Bumping Sound from Under Driver Feet?

CHARLESTUCK

MEMBER
2014 MERCEDES BENZ S550
V8
TURBO
4WD
AUTOMATIC
78,880 MILES

There is a pair of soft bumping sounds coming from under the driver foot area. The soft noises come in pairs, evenly spaced, on level highway, at various speeds. It is not constant and I don't feel it through the steering wheel. It doesn't happen constantly.

Thursday, March 12th, 2026 AT 10:02 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
55,112 POSTS

Does the noise happen more as you accelerate? I have seen the engine mounts go out in these cars and allow the exhaust to contact the underside of the car to make a bumping noise that is rhythmic. It could be a loose underbody panel or splash shield so I would look under the car to see if anything is hanging down. There is a center support of the driveshaft that can go out and cause this kind of noise it would be at the transmission tunnel. All of these inspection will require the car to be on a lift. Once lest thing is the muffler system hangers might be broken allowing the exhaust system to move around excessively. Please upload a short video in your response of the problem, so I can see what's going on. Ken

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Friday, March 13th, 2026 AT 10:31 AM