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Thread: Genuine RENNtech ASR Defeat - New Old Stock

  1. #1
    Malachite Mensch
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    Genuine RENNtech ASR Defeat - New Old Stock

    Hello:
    For Sale:

    Genuine RENNtech ASR Defeat for E500E, new - never installed. Complete with all original paperwok including Renntechs' invoice to BHMA, Inc (Beverly Hills Motoring Accessories) for $559.00 (wholesale) dated 9/14/95. BHMA was the west coast AMG distributor.
    The last list price on this was close to $900.00 I think.

    Probably the LAST opportunity to get one of these brand new.

    I will ship anywhere in the world but YOU will pay actual postage and insurance.
    Paypal accepted.
    $550. OBO.

    Thanks,

    Ron

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    E500E explorer 500AMM's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hi Ron.

    I have some questions:
    - Do this ASR-switch give a constant or temporary defeat?

    - Does the switch include a warning light when it's activated?

    - Any pics of the kit?

    Cheers
    '92 500E, 6.0AMG, König SC, Black on Black --- '94 E500 Limited, Sapphire black --- '05 E220 T Cdi Avantgarde, Cubanit silver --- '85 Kawasaki Z1300 DFI, Black

    -- The best thing with telling the truth, is that you don't need to keep in mind what you said --

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    E500E Guru Jimbo's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Constant defeat....and yes, a little red warning lamp should be on if their kit used the correct switch. Dash warning lites still come on btw with this kit.

    I just un-plug 1 speed sensor (by the CAN or the other shock tower area) for my no-ASR foolery.
    1992 500E - Spruce Green(249) Cream-biege (275) ... owned since 1999
    2007 CLK63
    2003 RS6
    2001 allroad
    1966 250C

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Interesting... does the RENNtech rocker switch have an LED that lights up when the defeat is active? All the kits I've seen don't have an LED in the switch, only the dash lights come on.

    Pulling the wheel speed sensor by the front strut mount does accomplish the same thing, but also disables ABS, which may not be desireable for some people (myself included). The switch on the dash makes it nice & simple, and leaves ABS fully active.


    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hello Arnt:

    As Jimbo said.... it is a constant defeat as long as the switch is activated (on). And the switch does have an internal LED which lights up when the ASR Defeat is activated. When the switch is "off" the ASR returns to it's normal function and no light is on .

    I also have a Mercedes first gear start transmission valve body ($370.) which, when combined with the Renntech unit, will allow you to out hooligan the most dedicated Polish football fan.

    Pics to come later today.

    Kind Regards,

    Ron


    Quote Originally Posted by 500AMM View Post
    Hi Ron.

    I have some questions:
    - Do this ASR-switch give a constant or temporary defeat?

    - Does the switch include a warning light when it's activated?

    - Any pics of the kit?

    Cheers

  6. #6
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Ron,
    Are you sure the LED lights up when ASR is deactivated as opposed to just lighting up with the rest of the panel lights?
    '94 E500 (744) | '94 E500 (199)         Misc. snapshots

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by Glen View Post
    Ron,
    Are you sure the LED lights up when ASR is deactivated as opposed to just lighting up with the rest of the panel lights?
    I'm with Glen... there is an LED inside for backlighting, but is there a second LED for an indicator...? I've never seen a setup like that (well, except for the Hagmann kit, which has a weird switch with two red indicators).

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by gsxr View Post
    I'm with Glen... there is an LED inside for backlighting, but is there a second LED for an indicator...? I've never seen a setup like that (well, except for the Hagmann kit, which has a weird switch with two red indicators).

    There are 2 (two) LED's inside the switch. I just took off the "ASR" cover, as soon as the damn camera is charged I'll take a pic and post it.

    Kind Regards,

    Ron

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Ah, interesting! I didn't realize they had done that. It's a bit different than the setups in my cars. Thanks for the info, Ron!!

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    The switch RennTECH used is not un-like the 'frosted donut' switch that came with the cars and has a red lite on it when activated...but there are other OE switches that can also be used and do not have a red indicator lite. I think Mike Curcio had used a few of them in his 'kits' way back when...

    Yes, I do know it's tire with chains on the switch we all got !
    1992 500E - Spruce Green(249) Cream-biege (275) ... owned since 1999
    2007 CLK63
    2003 RS6
    2001 allroad
    1966 250C

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    needs quiafe...
    Blue Ridge Mercedes Jonathan Hodgman
    Mercedes Repair Atlanta
    http://www.blueridgemb.com/
    05 E55 Estate; 93 500E Brumos; 92 500E 6.0 RENNtech;
    91 560SEC ECE (199) 87 Hammer Wagon 6.0L 32V; 87 Hammer 6.0L 32V; 86 560SEL AMG 6.0L 32V

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by jhodg5ck View Post
    needs quiafe...
    LOL. You a Quaife dealer yet, Jono?

    <--note the twin black stripes
    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by Jimbo View Post
    The switch RennTECH used is not un-like the 'frosted donut' switch that came with the cars and has a red lite on it when activated...but there are other OE switches that can also be used and do not have a red indicator lite. I think Mike Curcio had used a few of them in his 'kits' way back when...

    Yes, I do know it's tire with chains on the switch we all got !
    Jimbo:

    I have the frosted donut switch (FDS) apart and.... The FDS can be compared to a DPST where the ASR switch can be compared to a SPDT switch (I think).

    The FDS is an air circulation item. And I bet anyone who uses the FDS can be assured of getting rid of that musty unwanted smell that frequently gathers in confined unused areas of the interior. Especially with the organic material used on the seats. Frequent use will probably prevent the oder from being overwhelming.

    Kind Regards,

    Ron

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    Senior Member Prime's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Interesting about the light. My ASR defeat switch lights up with a yellow light when engaged. I thought they all did. I also thought mine (installed prior to my ownership) came from the standard Benz parts bin, but does this mean it's a Renntech? Entirely likely, since the previous owner installed some other Renntech bits. See pics below, normal and engaged:

    Click image for larger version. 

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    1993 500E - SOLD
    ASR defeat, Renntech chip, remote start, remote entry,
    Debadged, Color-matched cladding & Grill, Silver Arrow brake upgrade

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Prime,

    The switch in your photo is definitely non-factory. The factory ASR off switch (as seen in the W140 chassis) does not have black letters in a white square, it has white letters on the black background, as seen (fuzzily) below. No LED indicator in the switch however:

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    You can see a 140 ASR OFF switch as modified and retrofitted in my car here:
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  17. #17
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Thanks, GVZ... much better photo of the W140 switch. This is what I have in my cars.

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Senior Member Allgonquin's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hmmm. You guys just reminded me that I have a Mike Curcio kit in my garage which I've never installed. Have to see if I can dig it up.

    Rgds,
    Chris
    Allgonquin

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    Member david hendy's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    You guys just reminded me I have Mike Curcio in my back pocket, I need to have him make me some kits I can sell.....
    David Hendy
    '97 Renntech E60RS - 6 liter M119
    '92 500E 199/275
    '92 400E
    '85 190E 16V

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    E500E explorer 500AMM's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by david hendy View Post
    You guys just reminded me I have Mike Curcio in my back pocket, I need to have him make me some kits I can sell.....
    Wow - several choices comes up here, that's fine.
    I'm curious about the Mike Curcio solution, pics is highly appreciated.

    Cheers
    '92 500E, 6.0AMG, König SC, Black on Black --- '94 E500 Limited, Sapphire black --- '05 E220 T Cdi Avantgarde, Cubanit silver --- '85 Kawasaki Z1300 DFI, Black

    -- The best thing with telling the truth, is that you don't need to keep in mind what you said --

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    E500E explorer 500AMM's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by Ron500E View Post
    Hello:
    For Sale:

    Genuine RENNtech ASR Defeat for E500E, new - never installed. Complete with all original paperwok including Renntechs' invoice to BHMA, Inc (Beverly Hills Motoring Accessories) for $559.00 (wholesale) dated 9/14/95. BHMA was the west coast AMG distributor.
    The last list price on this was close to $900.00 I think.

    Probably the LAST opportunity to get one of these brand new.

    I will ship anywhere in the world but YOU will pay actual postage and insurance.
    Paypal accepted.
    $550. OBO.

    Thanks,
    Ron
    Ron,

    If this ASR-defeat fits a '95 E420, I have a possible buyer here in Norway.
    He needs to know how it's hooked up and to see pics of the kit.

    -------
    BTW, do this kit fit into SL500 and SL600 too?
    -------
    Last edited by 500AMM; 06-14-2012 at 06:24 AM.
    '92 500E, 6.0AMG, König SC, Black on Black --- '94 E500 Limited, Sapphire black --- '05 E220 T Cdi Avantgarde, Cubanit silver --- '85 Kawasaki Z1300 DFI, Black

    -- The best thing with telling the truth, is that you don't need to keep in mind what you said --

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    Senior Member Prime's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hmm... I never really cared for the look of my switch with the black letters on the white background. The other looks much nicer, IMO. But I do have a light, so I guess I'll take it.
    1993 500E - SOLD
    ASR defeat, Renntech chip, remote start, remote entry,
    Debadged, Color-matched cladding & Grill, Silver Arrow brake upgrade

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    E500E Guru Jimbo's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by david hendy View Post
    You guys just reminded me I have Mike Curcio in my back pocket, I need to have him make me some kits I can sell.....
    What's Curcio doing in your shorts David?

    Nevermind, I'd rather not know !
    1992 500E - Spruce Green(249) Cream-biege (275) ... owned since 1999
    2007 CLK63
    2003 RS6
    2001 allroad
    1966 250C

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by 500AMM View Post
    -------
    BTW, do this kit fit into SL500 and SL600 too?
    -------
    The kit SHOULD work with R129's with LH injection (1993-95).... but I don't know if it's the same for early R129's (CIS-E injection) or later R129's (ME injection).

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by 500AMM View Post
    Ron,

    If this ASR-defeat fits a '95 E420, I have a possible buyer here in Norway.
    He needs to know how it's hooked up and to see pics of the kit.

    -------
    BTW, do this kit fit into SL500 and SL600 too?
    -------
    Here are the installation instructions.



    1993 500E
    http://2phast.com/500e/500e-sig.jpg

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    E500E explorer 500AMM's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by 2phast View Post
    Here are the installation instructions.
    Thanks Rik. I'll show it to the E420 owner so he can decide what he wants.


    Quote Originally Posted by gsxr View Post
    The kit SHOULD work with R129's with LH injection (1993-95).... but I don't know if it's the same for early R129's (CIS-E injection) or later R129's (ME injection).

    Dave,

    I know that the owner of the Brabus 7.3 SL here wants an ASR-defeat too, so I just wondered. But I don't know which injection system the SL600 has.


    -arnt-
    Last edited by 500AMM; 06-14-2012 at 04:47 PM.
    '92 500E, 6.0AMG, König SC, Black on Black --- '94 E500 Limited, Sapphire black --- '05 E220 T Cdi Avantgarde, Cubanit silver --- '85 Kawasaki Z1300 DFI, Black

    -- The best thing with telling the truth, is that you don't need to keep in mind what you said --

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    PM sent

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hi there. Tried sending you a PM, but I'm not seeing it in my sent items.
    Anyway, I'm totally interested in the ASR Defeat if it's not sold. Please email me at jesster76@shaw.ca.

    Cheers,
    Jesse

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    E500E Guru 2phast's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    FYI. In the document, Renntech listed wires 25, 35 and 37 with 25 being blue/white, 35 being brown/blue and 37 being brown/blue or brown/yellow. In reality, on my 5/93 build 500e, the colors for the wires were; 25 blue, 35 brown/yellow and 37 brown/green.

    What matters though is not the color, but the actual wire numbers, so pay attention to them as they are listed on the bottom of the socket. DO NOT just go by the colors.
    1993 500E
    http://2phast.com/500e/500e-sig.jpg

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by 2phast View Post
    FYI. In the document, Renntech listed wires 25, 35 and 37 with 25 being blue/white, 35 being brown/blue and 37 being brown/blue or brown/yellow. In reality, on my 5/93 build 500e, the colors for the wires were; 25 blue, 35 brown/yellow and 37 brown/green.

    What matters though is not the color, but the actual wire numbers, so pay attention to them as they are listed on the bottom of the socket. DO NOT just go by the colors.
    Thanks Rik, that was very important info!
    I just had that question on my list since I plan to follow the set-up presented on your homepage.
    '92 500E, 6.0AMG, König SC, Black on Black --- '94 E500 Limited, Sapphire black --- '05 E220 T Cdi Avantgarde, Cubanit silver --- '85 Kawasaki Z1300 DFI, Black

    -- The best thing with telling the truth, is that you don't need to keep in mind what you said --

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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by 2phast View Post
    FYI. In the document, Renntech listed wires 25, 35 and 37 with 25 being blue/white, 35 being brown/blue and 37 being brown/blue or brown/yellow. In reality, on my 5/93 build 500e, the colors for the wires were; 25 blue, 35 brown/yellow and 37 brown/green.

    What matters though is not the color, but the actual wire numbers, so pay attention to them as they are listed on the bottom of the socket. DO NOT just go by the colors.
    Rik,

    I made that schematic on PowerPoint when I was installing my renntech ASR defeat. I remember the wire colors weren't matching up. I think that was originally posted either in the hotrod forum of what was then mercedesshop.com or Scott's old site. I still remember the smudges on the renntech instructions!

    The Mac that was originally on has since crapped out taking most of my files.

    Careful with that ASR defeat though. Back when it was new, I turned on the defeat one day to see what it was like to drive with asr off the whole time...I hit a puddle as I was accelerating into the highway. Shortly thereafter I could hear a low pitched moaning, like a police siren several octaves lower in the audio equivalent of "slow-mo." When I looked in the rear view I could see nothing but a huge wall of white smoke and the speedo was reading much too fast for my actual rate of speed. I let my foot off the gas and only then did I realize it was my rear tires spinning like crazy creating all the sound and smoke. At first i thought my engine blew causing all the smoke. Took a while for me to regain my composure but when the smoke dissipated, behind it were several cars on the highway...stopped....waiting for the smoke to clear! Haha!

    On a serious note though, after all that expense, it's not someone I use regularly. In fact, I don't recall the last time I used/needed it. It seems to me that the only times ASR really gets in the way is on freeway on ramps in the rain, (and on dyno runs). ASR likes to engage on certain on ramps...and in the wet, it's pretty dangerous when it does engage cause what you get is the equivalent of lift off oversteer. But turning on asr defeat in the wet is so counter intuitive. I just end up trying to be smoother on on ramps, leaving the shenanigans for straightaways.
    1993 W124.036 500E | 1993 S124 300TE 24 AMG 3.4L | 1990 W126 300SE | 1982 S123 300TD Turbo | 2007 E70 X5

  32. #32
    Senior Member Hollybrook's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by rainmaker View Post
    ASR likes to engage on certain on ramps...and in the wet, it's pretty dangerous when it does engage cause what you get is the equivalent of lift off oversteer. But turning on asr defeat in the wet is so counter intuitive.
    Having read horror stories about ASR induced handling problems, I was always cautious cornering the 500E. One day I had a great chance to try cornering at the limit with plenty of run-off room at the outside of the off-camber turn. It was quite a shock! When the computer chopped the throttle, I encountered massive understeer and the car pushed two lanes to the outside, using just about all the room I had. I was expecting MUCH less effect than I encountered.

    Until I get an ASR defeat switch in my car, there will be no more playing around in the corners...

    That said, the ASR is really fantastic in most conditions and engages so smoothly that you really don't know that it is there except for the light on the dash and the lack of spinning wheels. MB was way ahead of their time in the early '90s with this system!

  33. #33
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Interesting results from rainmaker (oversteer) and Hollybrook (understeer). I wonder if the effects are different based on wet vs dry, and how good your tires are for the condition of the pavement. At any rate, most of the time under normal driving, ASR works quite well. When really pushing traction limits, you may want to turn it off, but the peg-leg differential often spoils the party.

    ASR III (the version we have on the 500E) was way ahead of its time in the early 90's. The ESP system, which replaced ASR in the late 90's, took things a step further and would correct for oversteer/understeer during traction loss by having the ability to brake each of the four wheels separately (ASR can only brake the rears separately, not the fronts at all).

    I still only turn off ASR at the dragstrip in the burnout box.

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
    Click here for my YouTube channel

  34. #34
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    death to ASR....!! it's caught me out on many on occasion. It's nice when I want to launch the car in the wet..Then I like it..

    ASR w/ Quaife and STICKY tyres, not all that bad, very transparent.

    Jono
    Blue Ridge Mercedes Jonathan Hodgman
    Mercedes Repair Atlanta
    http://www.blueridgemb.com/
    05 E55 Estate; 93 500E Brumos; 92 500E 6.0 RENNtech;
    91 560SEC ECE (199) 87 Hammer Wagon 6.0L 32V; 87 Hammer 6.0L 32V; 86 560SEL AMG 6.0L 32V

  35. #35
    Senior Member Hollybrook's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by gsxr View Post
    Interesting results from rainmaker (oversteer) and Hollybrook (understeer). I wonder if the effects are different based on wet vs dry, and how good your tires are for the condition of the pavement.
    I think a lot of it has to do with the difference in what we were doing. Rainmaker was probably already at steady state cornering, so when the throttle was chopped, he encountered typical trailing throttle oversteer. My case was a bit different -- as I entered an off camber turn, I was trying to initiate a bit of throttle induced oversteer at turn-in to counteract the inherent understeer. Before the weight had adequately shifted to the rear tires, the throttle was chopped. Since the front tires were doing most of the work and the 500E is set up with a fair amount of steady state understeer, the front tires were grossly overloaded and they lost all grip, leading to the massive understeer.

    Vehicle dynamics are a very interesting subject! It is also one that I dislike playing with if the car has a mind of its own and does not correctly respond to control inputs...

  36. #36
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by gsxr View Post
    Interesting results from rainmaker (oversteer) and Hollybrook (understeer). I wonder if the effects are different based on wet vs dry, and how good your tires are for the condition of the pavement. At any rate, most of the time under normal driving, ASR works quite well. When really pushing traction limits, you may want to turn it off, but the peg-leg differential often spoils the party.

    ASR III (the version we have on the 500E) was way ahead of its time in the early 90's. The ESP system, which replaced ASR in the late 90's, took things a step further and would correct for oversteer/understeer during traction loss by having the ability to brake each of the four wheels separately (ASR can only brake the rears separately, not the fronts at all).

    I still only turn off ASR at the dragstrip in the burnout box.

    I've never experienced under steer whenever ASR engages. Back when I used to take the 500E to the racetrack, there was always these series of tight esses that would cause ASR to engage right after the first apex just when you get back on the gas. To avoid it, I'd have to take the esses much slower. But taking the corner at what seemed to me to be the appropriate speed, ASR would engage. I'm the farthest thing from a race pro but iirc, lifting and getting right back on the gas with a bit of counter steer always worked consistently. But this was in the dry.

    In the wet, it's a totally different story. It seems a lot more unpredictable to me, maybe because im probably not concentrating as hard on public roads (i.e. relaxed as compared to the track). I just basically pee in my pants a little.
    1993 W124.036 500E | 1993 S124 300TE 24 AMG 3.4L | 1990 W126 300SE | 1982 S123 300TD Turbo | 2007 E70 X5

  37. #37
    Senior Member
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    If the kit is still for sale, I am interested.

    Thanks,

    Mike
    1969 Pontiac LeMans Red/Black 105k
    1993 500E Silver/Black 180k
    1991 420SEL Anthracite/Saffron 176k
    2014 Subaru Impreza

  38. #38

    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Quote Originally Posted by gerryvz View Post
    You can see a 140 ASR OFF switch as modified and retrofitted in my car here:
    limo panel?

  39. #39
    Junior Member
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Hi, is this kit still available?

  40. #40
    E500E Guru Trae's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    Gentlemen,
    Does pulling the ASR relays disable the ASR (to do burnouts)? This was how I found my car two days ago. I could not find the original relays and the shop owner pulled two relays from one of his customers SL500s and put them in my 500E. So far, no problems.
    Trae
    1992 Renntech 500E
    1993 500E
    1994 E320 Wagon
    2001 SL500

  41. #41
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    You can just unplug one of the two front wheel sensors (one is near the CAN box underhood) to disable ASR and ABS. This will allow you to do burnouts all day long, although the dashboard ASR and ABS lights will light up as long as the connector is unplugged, and the system will store an ASR/ABS sensor code. There is no need at all to remove the ASR CAN computer from the CAN box, or any sort of relay.

    In fact, if one of the computers was removed to do this, then it shows extreme ignorance of the cars by the mechanic(s) involved, which would lead me to question their competence.

    You can also bridge two of the contacts in the 38-pin CAN connector with a cut paper-clip or other short/fine wire, to disable ABS/ASR. However I always found that just unplugging a wheel sensor is quickest and easiest. I used to do this for drag-racing.

    Cheers,
    Gerry

  42. #42
    .036 Hoonigan™ gsxr's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    FYI. Some ASR defeat kits use multiple cube relays, as shown in this photo. Normally you just flip the switch on the dash to temporarily disable ASR. Removing the relays would also disable ASR but that seems silly unless the dash switch was broken. Otherwise the methods GVZ describes above are the more usual methods to disable ASR on cars without the defeat kit installed.

    If a car does not have an "ASR Off" switch, there is no relay that you can remove to disable ASR. Can you post a photo of the "relays" which were missing from your car?

    Dave M.
    1997 E420 (Bugeyes)
    1995 E420 (R.I.P.)
    1994 E500 (Q-ship)
    1992 500E (Mach 5)
    1987 300D (Sportline Stage 2)
    Click here for my website
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  43. #43
    Senior Member
    & "Bitter Mechanic"
    jhodg5ck's Avatar
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    Re: Genuine RENNtech ASR Defeat - New Old Stock

    No ASR + Quaife and crappy tyres = LOTS of fun..!!
    Blue Ridge Mercedes Jonathan Hodgman
    Mercedes Repair Atlanta
    http://www.blueridgemb.com/
    05 E55 Estate; 93 500E Brumos; 92 500E 6.0 RENNtech;
    91 560SEC ECE (199) 87 Hammer Wagon 6.0L 32V; 87 Hammer 6.0L 32V; 86 560SEL AMG 6.0L 32V

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