Some of you may or may not be familiar with my recently acquired S280 which has featured somewhat in my owners thread. The car has full service history and all records from new and was due the 45k mile service now. I usually do all my own stunts regarding maintenance and this S280 has recently had a lot of work done to it since I bought it– including the oil change / service BUT given the low miles I did want to ensure the service book was kept updated / stamped by a Mercedes Main dealer none the less.
I first phoned them to book the car in and advised it was due the 45k miles lubrication service only in the book. When I queried what oil they would propose to use they suggested 5W-30 initially.... I declined. I was advised that they did not actually have any suitable oils for this car on the shelf and that I would be better to bring my own oil in the car for them to use. (They have MB 5W-30 for example but not m104 suitable oils) I had no problem with that and duly ordered up / supplied 2x 5 litre bottles of my preferred oil for them to use.
I dropped the car off yesterday evening with the oil in the passenger footwell and they serviced it today. I was curious where they might fill the oil level to as there was a service bulletin issued by Mercedes for the m104 and motors of that era to only fill them with engine oil to half way up the dipstick. (Attached) I did think of telling that to the service advisor when handing over the keys but decided the message would likely not make it to the guy in the workshop anyway and besides – they should know that anyway!!
They were very complimentary on the condition of the car which was nice of them to say. So I collected the car and I went on my way home – 25 mile trip or so. Now being a pedantic git I didn’t like the felling of driving the car not knowing precisely where the oil level was at. So when I got home I checked the oil level. I needn’t have worried about them filling it above the half way mark on the dipstick. They had in fact overfilled it above the max mark by a good 4mm. Above the max lettering itself too. The actual oil level is hard to see on the picture below but you can see the markings on the dipstick I am referring to.
So I had to get my oil vac out and remove approx 1.2L of oil from the car just to set the level 1mm under the max mark. (I will also vac more oil out tomorrow to bring down further to meet half way mark) Now I’ve never overfilled oil in any car in my life and it’s ironic that the first time I bring a cherished car of mine to a MB main dealer they overfill it for me. Is this because they blindly followed a specified oil fill qty without even checking the dipstick? (Some modern MB models don’t even have dipsticks now....)
So are my expectations too high re the half way mark? Is overfilling it above the max mark a big deal?
I’m not the complaining type so I do not know if it is worth phoning them to notify them of this.... what good will it do at the end of the day I’ve already corrected the oil level to where it needs to be.
It makes you wonder if you got more work done on an older benz beyond the scope of just an oil change what else might they mess up due to being out of touch with the older models? Do you negate the MB stamps and keep your own service records instead then?