shamrode

I thought maybe to rephrase my question. When you guys are driving your cars hard with the windows up and a/c on do you experience any bad smells in the cabin? If so can you please identify them for me. I still can't figure what is causing the burnt smell in my cabin at high speeds and hard acceleration.

unruin

I'll let the mechanical experts chime in but it sounds like it could be an exhaust leak or something.

Is your car under warranty? I just had my car checked for odd smoking and a smell and it turned out I ran over a plastic bag and it had got caught on my headers and melted. Dealer didn't charge me for the diagnosis but I'm under warranty.

shamrode

No warrentee. Actually found the old remnants of a bag; wasn't making the smell. I had the exhaust checked and no leaks were found. I inspected the whole rear end and everything appears to be air tight. I was thinking perhaps it may be the vents on the sides of the car under the back bumper. They are meant to release cabin air to keep pressures stabilized. Perhaps when driving at high speeds at wot cat converter rank is creeping back in through those vents because of high wheel pressures in the wheel well.

GRam

I had a bad stench on start up, never while accelerating.
Changed the cabin filter out and been good since. Cheap enough thing to try for you if you haven't already..

unruin

Sounds like other people have had success of getting rid of smells by changing the cabin filters:
https://mbworld.org/forums/c63-amg-w...placement.html

Not a bad way to go since you said the smell happens when the A/C is on.

Just bought one for myself:

Tinbucket

I have the same problem. They checked the car twice I think. i may go to another Dealer.
The smell is stronger in the trunk. It occurs when idling or windows open. i suspect the vents to let out positive pressure in the trunk too. I've even though maybe a plug was left out of the spare tire well.
Did not encounter the problem until the Dealer where I bought it detailed the car and soaked the carpets with spot cleaner. we like to have died on the way home, with the windows open and the air running on high. Since that time we have had the funky Road dirt/exhaust smell. With air going and running down the road it doesn't seem to be there, just if you open the windows or go slow.
The leather smell is gone since the detailed it too.

jl9j

Any chance it is the catalytic converter? I know after a hard run, the garage smells like rotten eggs. That's the cats from what I've searched.


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shamrode

It definately could be. Probably is the cats. The questiob is why I smell it in the car.