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Yesterday I noticed an burning oil smell while waiting in the car wash line and found oil coming from the driver side valve cover, just under the oil cap. We've only had the car 3000 miles since buying it; it has 23,000 total miles, and never noticed this before. It's an '05 C55.

Is this a normal thing for these cars? It could just be a bad seal, but it could also be too much pressure in the system, which means bigger problems.

c32used

I don't think its normal but there are cases where our cars have them...I have the same issue with my 2002 at the same spot.

hooleyboy

Yeah Mine was leaking from the same spot too, I would say its normal for them to leak.. in a bad way. I would just get it fixed an you will be fine.

Also check the inside of crank pulley and see if the oil has found its way down to it. Some say oil cant get into the crank bolt and that maybe true but its good to have your eye on it, get it fixed ASAP.

Also check your motor mount they go bad and leak too. I'm on my 3rd set

performance1st

bring it to the dealership, i got the same leak fixed (supposedly) under warranty.

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It's going to the dealer on Thursday. It's still under factory warranty so at least I won't be out any money. I'll have to ask them to give the engine area a good look over to see if there is oil leaking anywhere else, but I can't see anything other problem areas from the top of the engine.

cruzinquick

There is a TSB for the crossfire and I assume it's the same for you. My car only has 4000 miles but had the lead at 200 miles. I went to MB and bought the gasket sealant and did it myself. I didn't want any scratches or crappy service for something so small. I also changed the aluminum bolts to stronger ones.

mkonei

i had it too, not really a big deal. im a bit over 50k miles now, and thats the only issue ive had....thank god

NitrogenBalance

Love the screen name...

Here is a link to a nice DIY that just posted in the W211 forum, should be the exact same job sans 2 cylinders and a few less valve cover bolts. Ignore the coil/plugs/wires part as thats not needed in your application unless you've never changed them, which would be a good time to do it.

https://mbworld.org/forums/w211-amg/...lug-wires.html

From what I've seen many M113/M112's have weaping or leaky valve covers. Mine are due for this job.

turbo16lbs

That's actually what got me to click on the thread. I read the name before reading the title of the thread and curiosity just took over.

bmjdevelopment

Same problem here two years agos. Since I had them replaced, no problems.

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That is a great write-up. As much as I would like to do this myself I'll still let the dealer work it out since the car is under warranty.

The screen name refers to my profession. All legal of course.

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Dealer sealed the cover with their silicon band-aid fix. I'd rather have a new seal but it's workable for now. If it happens again then it'll get a new seal.