kevm14

There was a bulletin on this. I think they fiddled with the idle speed to find a slightly happier place to cut down on steering wheel vibes.

tbilisi79

That is correct. Thats one part of the solution. raising rpm by 50 in drive.

Still wonder what the 1500-2000 stumble is.

kevm14

Is it really a stumble? Put your hand on the engine to see if it's actually running any differently.

tbilisi79

Will give it a try. Thank you

Phatboiondiet

I’ll tell ya, I’m getting tired of this myself. I’ve done complete tune up, TB Cleaned and relearned. Changed motor and tranny mounts twice with no luck. Today i disconnected mid pipe from exhaust and ran it to see if vibrations get better. I still felt same vibrations in reverse and drive. Looses top bolt on engine mounts and loosened transmission mount nuts. I made sure exhaust was fitting perfectly all lined up 100%. After adjusting everything I bolted it up started the car ran super super smooth until I put it in gear and turned the wheel. If I don’t turn the wheel it’s smooth. I had someone go inside put it in gear while I’m under the car on the lift without wheels turning and I can feel the vibrations I feel inside flowing through the mufflers. I’m guessing it does have something to do with the pipes. Btw after fiddling with it today I get a slight driveline vibration now 🙄.

Phatboiondiet

Forgot to add, when car was in the air I felt the vibration in mufflers but the vibrations weren’t felt inside the cabin until wheels touched the ground again.

Phatboiondiet

Happy to finally announce I have solved my dang vibration. When I tell ya I’ve done everything believe me. Almost freaking changed the torque converter too cause there was nothing left to change. My issue was axles 🙃 they were replaced with aftermarket axles. Pulled Mercedes OEM axles from junkyard and replaced my aftermarket’s. Night and day difference 98% vibration is gone!! Might not be everyone else’s issue but if you’ve put on after market axles I’d look into it.

DanT1977

Thank you very much Juha. This was exactly the problem with a w221 that tormented me for 2 weeks with body vibrations in D and R. Exact. The rollers in the tripod were reversed. I would never have thought of that. I changed everything that could be changed in the car without success. That is until I read your post. Thank you again. The car in question, S350 cdi 4Matic from 2010




The images are from another post and are for reference.