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Thread: New E420 project

  1. #1
    Senior Member Hakie's Avatar
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    New E420 project

    I bought a parts car yesterday. The car is probably to rusty to get it fixed. The engine runs great and has lots of new parts like radiator, ETA, EZL, wiring harness, etc. All the maintenance is done by a mercedes dealer in Luxemburg. They know all about throwing in new parts.
    Best is the E500E interieur. Also a nice steering wheel, SLS, Almost every option available
    I will investigate if the car can be saved but i have to store it for a while. My 400E needs to get my attention first. To busy working at the moment. Just could not let this one go....



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    Last edited by Hakie; 07-13-2018 at 03:37 PM.

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  3. #2
    Senior Member S70/2's Avatar
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    Re: New E420 project

    Fine lookin’ burl

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    Senior Member Hakie's Avatar
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  7. #4
    E500E Guru sheward's Avatar
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    Re: New E420 project

    Wow, nice find!

    drew
    Drew
    92 500e 58,500 miles
    92 500e 180,000+ miles
    93 500e 179,000 miles sold
    92 500e 110,000 miles sold

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  9. #5
    E500E Guru a777fan's Avatar
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    Re: New E420 project

    Guh!!! Super jealous of all those parts!! Great find.


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  11. #6
    Senior Member Hakie's Avatar
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    New E420 project

    I was in doubt about the wiring harness. The car runs ok with some used caps and rotors but still has a misfire somethimes. The used stuff must be the cause.

    I hope this is the correct date for upper harness?
    It says 2010 but the other side of the label says ZD 09.09.92?
    IMG_5118.JPG

    The blower motor is not running. Took it out but the motor is ok. Could the regulator be blown? Can i test and/or repair the regulator?
    All the fuses are ok. Also the 30A strip fuse. (Read about it on the forum).

    I probably will put the car up for sale. I have my 400E and E500 to take care of.
    Bought the car as a parts-car but it is so nice and clean inside i can not part it out.
    Hopefully i find someone who will take it as a project. There are a few holes and a lot of rust on the common places.

    IMG_5133.JPGIMG_5127.JPGIMG_5125.JPGIMG_5126.JPGIMG_5131.JPGIMG_5129.JPG

    I will pull codes and clear them and see which come back.

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  13. #7
    .036 Hoonigan™
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    Re: New E420 project

    Quote Originally Posted by Hakie View Post
    I hope this is the correct date for upper harness?
    It says 2010 but the other side of the label says ZD 09.09.92?
    2010 is the manufacturing date, the harness is fine. 1992 is the design date.


    Quote Originally Posted by Hakie View Post
    The blower motor is not running. Took it out but the motor is ok. Could the regulator be blown? Can i test and/or repair the regulator?
    All the fuses are ok. Also the 30A strip fuse. (Read about it on the forum).
    The regulator is the most likely fault, however it could also be the pushbutton unit. I'd swap the PBU from one of your other cars and see if that makes any difference. If not... you probably need a new regulator, and no the regulator cannot be fixed. 1994-95 (with dust filter) use a different regulator than without dust filter, make sure you order the correct one if buying new.


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  15. #8
    Senior Member Hakie's Avatar
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    New E420 project

    Thanks, Dave. Glad the harness is fine. I pulled and cleared al the codes i could. However, i had code 22 on the LH unit. This can not be cleared. It says a faulty O2 sensor? This explanes the smell of gas and instable idle?

    I will swap the PBU when i find the time.

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    E500E Guru a777fan's Avatar
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    Re: New E420 project

    I am in LOVE with that steering wheel!

    How much to convince you to source a normal replacement, and take it off and sell it to me before you sell the car??

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  19. #10
    Senior Member Hakie's Avatar
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    New E420 project

    Quote Originally Posted by a777fan View Post
    I am in LOVE with that steering wheel!

    How much to convince you to source a normal replacement, and take it off and sell it to me before you sell the car??
    I know! The wheel is an eye-catcher and thought this question would come up. I really dont know for sure yet what to do with the car. For now the wheel stays at the car. When i decide to sell it in parts you can get the wheel. That is all i can promise, sorry.

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  21. #11
    E500E Guru sheward's Avatar
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    Re: New E420 project

    A few years back I initiated a group buy for custom recovered steering wheels and never saw it through. Apologies to all members here. The company was Dallas Steering Wheel and there are many happy users here on the board as well as a dedicated thread with pricing. I believe the standard price to refinish your wheel like the example here was $600. I have one to send myself for the same treatment but they can do nearly anything you would like.

    drew
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    92 500e 180,000+ miles
    93 500e 179,000 miles sold
    92 500e 110,000 miles sold

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  23. #12
    E500E Guru Trae's Avatar
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    Re: New E420 project

    Who says I'm not the captain of my ship?

    Trae
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  25. #13
    Senior Member Hakie's Avatar
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    Re: New E420 project

    Another problem occurs.. it is indeed a faulty O2 sensor. In fact, the whole sensor is MISSING!
    IMG_5137.JPGIMG_5138.JPG

    I have a few exhaust invoices of a total of 2300 euro including a cathalyst.
    Unfortunately they did not mount back the sensor. They screw it up at the Mercedes dealer in Luxemburg. Work was done in 2011 so i think the car must be driveable without the sensor?

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  27. #14
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    Re: New E420 project

    Um... actually, that appears to be the factory non-catalyst pipe... much cheaper than the catalysts. But there is no provision for an O2 sensor, you have to cut a hole and weld in a bung for it.

    While the car will run & drive without the O2 sensor, it will be stuck in open-loop mode, which results in reduced power & economy. The better solution is to add the O2 sensor, which keeps the computers happy. If there are no emissions tests where you live, no need to install catalysts.


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  29. #15
    Senior Member Hakie's Avatar
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    Re: New E420 project

    I will investigate later, the invoice says they mounted a catalyst.
    Can i mount the nut for the sensor on only one of the pipes? Original the sensor is in a T-joint.

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  31. #16
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    Re: New E420 project

    Quote Originally Posted by Hakie View Post
    I will investigate later, the invoice says they mounted a catalyst.
    Based on that photo, nope, there are no cats present. See attached picture of the catalyst pipe next to non-cat pipe. It's not unheard of for shops to put things on the invoice that don't match what was actually done to the car.



    Quote Originally Posted by Hakie View Post
    Can i mount the nut for the sensor on only one of the pipes? Original the sensor is in a T-joint.
    Yes. Works fine. The location shown in the attached photos is NOT ideal, but does clear everything ok.

    Attached Images Attached Images

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  33. #17
    Senior Member Hakie's Avatar
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    Re: New E420 project

    Quote Originally Posted by gsxr View Post
    Based on that photo, nope, there are no cats present. See attached picture of the catalyst pipe next to non-cat pipe. It's not unheard of for shops to put things on the invoice that don't match what was actually done to the car.
    Yes it is definitly no cat. advantage is that it is quit "new". I can easy weld in the sensor.
    I believe there is no need for the CAT's as long as the car passes emission values for 1994. These values are not high. It is done before. I have read about it.

    Have seen most of the info on your pages, Dave. Forgot about this one. It is a great help, Thanks!

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  35. #18
    E500E Guru Trae's Avatar
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    Re: New E420 project

    I one does not have a common pipe, does it matter exactly where the O2 sensor is mounted? Left or right?

    We deleted our CATs also.
    Trae
    1992 500E Renntech
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    1990 560SEC/ 2001 SL500
    1991 560SEC ECE/1995 E320 Cabriolet

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  37. #19
    Senior Member Hakie's Avatar
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    Re: New E420 project

    I think is does not matter witch one but i will place it on the position as on the picture.

  38. #20
    .036 Hoonigan™
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    Re: New E420 project

    Quote Originally Posted by Hakie View Post
    I think is does not matter witch one but i will place it on the position as on the picture.
    Correct - it doesn't matter, as long as the engine is running well, and one cylinder bank isn't burning significantly different vs the other.

    Double-check the position before you drill & weld! The O2 sensor and wire needs to stay away from the spinning driveshaft. From memory, a slightly different position, possibly at an angle, may work better than what you see in the photo above. There's a small section of pipe that offers the appropriate clearance to the chassis/propshaft.


  39. #21
    Senior Member Hakie's Avatar
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    New E420 project

    Ok, i will mark the position before removing the exhaust.

  40. #22
    E500E Guru JC220's Avatar
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    Re: New E420 project

    Quote Originally Posted by Hakie View Post
    Yes it is definitly no cat. advantage is that it is quit "new". I can easy weld in the sensor.
    I believe there is no need for the CAT's as long as the car passes emission values for 1994. These values are not high. It is done before. I have read about it.

    Have seen most of the info on your pages, Dave. Forgot about this one. It is a great help, Thanks!
    I have a tip for you (which you might already know) prior to welding on your new 02 sensor blank boss I would strongly suggest installing an old O2 sensor or a 02 sensor thread cleaning tool into the boss. This will help to minimise distortion from welding heat. If a boss was welded on "empty" it's quite likely to distort the shape and you may not be able to thread the new sensor in.
    1987 w124 200 - 3.6 AMG build | 1990 w124 300E-24 | 1992 w124 500E

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  42. #23
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    Re: New E420 project

    Quote Originally Posted by Trae View Post
    Who says I'm not the captain of my ship?

    Wooooooh, anything on the starboard side? I'm too drunk too see.

    drew
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    92 500e 180,000+ miles
    93 500e 179,000 miles sold
    92 500e 110,000 miles sold

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  44. #24
    Senior Member Hakie's Avatar
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    Re: New E420 project

    Quote Originally Posted by JC220 View Post
    I have a tip for you (which you might already know) prior to welding on your new 02 sensor blank boss I would strongly suggest installing an old O2 sensor or a 02 sensor thread cleaning tool into the boss. This will help to minimise distortion from welding heat. If a boss was welded on "empty" it's quite likely to distort the shape and you may not be able to thread the new sensor in.
    Thanks for the tip! Knew that in the back of the head. I will buy a boss with a plug.

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  46. #25
    Senior Member Hakie's Avatar
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    New E420 project

    Removed the exhaust from the car this morning and ordered a boss and plug for installing the sensor.
    IMG_5656.JPG

    Last plan was to part the E420 out and keep the valuable parts for myself as spares. Now that I removed the cladding, bumpers and trunk "interior" I can see what is rusted.
    Thought it over a couple of times to save the car or part it out.
    Made de decision to try and fix the bad-rusted areas. These are common places like jack points, (part) battery compartment, door corner, under wiper fluid tank, and more.
    I have only little experience with welding but I will give it a try. It will be a challenge.
    Goal is to get the car on the road winter 2019. It will be my winter car and don't have to be in showroom condition.
    Technically the car seems to be ok, except the missing O2 sensor and failing blower regulator. I know there will be popping up other things.
    Started to dismantle the car to get easier access get it repaired.
    Park heater lines went leaking because I touched them... so I have to fix that too.
    I see this as a learning project to get welding skills. It will be far from perfect I'll do my best. I am not the person to let someone else do the job.


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  47. #26
    E500E Guru a777fan's Avatar
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    Re: New E420 project

    Guss!

    Glad to see you’re going to try and fix it. Shame about all that rust... almost looks like it was driven in winter and parked in the ocean come summertime.

    Great color though, and all those options!! )




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  48. #27
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    Re: New E420 project

    Wow. I had no idea the stationary heating system had all that plumbing up front, across the top of the bumper, in the fender wells, etc... that's crazy!


  49. #28
    Senior Member Hakie's Avatar
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    Re: New E420 project

    Quote Originally Posted by a777fan View Post
    Guss!

    Glad to see you’re going to try and fix it. Shame about all that rust... almost looks like it was driven in winter and parked in the ocean come summertime.

    Great color though, and all those options!! )

    Jon, this is indeed a good example of a rusted car. . Though it also can be much worse. Places were I expect rust are completely clean. Nevertheless it is a lot rust...
    There is a guy here who dismantles W124's and I will bring him a visit to cut some good, rust free peaces to weld in the car. I think that will work. Jack points are rusted in any car there so have to buy that part new.




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    Quote Originally Posted by gsxr View Post
    Wow. I had no idea the stationary heating system had all that plumbing up front, across the top of the bumper, in the fender wells, etc... that's crazy!

    Did not know that too! This is a factory installation. There is a pump, maybe 2 the left front and de heater is in the right front. My E500 has the heater also but that one is build in after delivery and don't look that much "professional".

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  51. #29
    Senior Member Hakie's Avatar
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    Re: New E420 project

    I have one question: there are 2 vacuüm valves? On the right side behind the headlight/wiper tank. One of them is not connected. What was the function of that one? Could that be headlight adjustment? Headlights were not stock version.

    IMG_5635.JPGIMG_5634.JPG

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  53. #30
    .036 Hoonigan™
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    Re: New E420 project

    Those valves are for emission controls. One is for the EGR, the other is for the air pump.

    The headlight vacuum system does not use any solenoids.


  54. #31
    Senior Member Hakie's Avatar
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    Re: New E420 project

    Ah ok, I already disconnected the air pump electrically. I will check the other connections. Thanks!

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