Causes of vibration through steering wheel and floor of car/gas pedal?
Thread Starter
Junior Member
Joined: Sep 2021
Posts: 68
Likes: 22
From: Orange County, CA
2012 C207 E550 RWD
Causes of vibration through steering wheel and floor of car/gas pedal?
I had to replace my shocks/struts after about 140K miles due to them leaking and ended up going with coilovers and then H&R lowering springs with stock replacement Monroe shocks. For some reason the ride is pretty rough, mainly on small bumps, surface level changes, and road imperfections. It feels like it crashes and bangs over them while larger bumps or dips are fine. There's also minor but noticeable vibration at almost any speed in my steering wheel and through the floor/gas pedal of the car. I've changed all of the following which did not help and I'm at a loss for what else to check:
- Front control arms complete with new ball joints/bushings.
- Front and rear shock top mounts, bearings, spring retainers, etc.
- New wheels, tires, balancing, alignment.
- New front sway bar, new adjustable sway bar end links in the front and rear installed on the ground with zero pre-load on the sway bars.
- New hub and wheel bearings for front driver and passenger sides (used dial indicator to set play according to Mercedes spec).
- Brand new Monroe (OEM maker of our shocks) front and rear shocks.
- Checked and re-checked and re-checked torque values on all shock/strut bolts.
Last edited by RosSauce; Oct 15, 2024 at 12:26 AM.
Thread Starter
Junior Member
Joined: Sep 2021
Posts: 68
Likes: 22
From: Orange County, CA
2012 C207 E550 RWD
Yup changed those and the transmission mounts. Also a weird thing that makes me think I'm crazy: some days my suspension rides smooth and other day it rides really rough, even in the same non-sport mode. I ran over the same bumps and areas over the past few days and it was crashy yesterday but soft today. No idea what is going on.
Last edited by RosSauce; Oct 16, 2024 at 12:37 AM.
Senior Member
Joined: Mar 2022
Posts: 267
Likes: 61
From: Chicago
Bi-Turbo E550 Coupe (W207)
Thread Starter
Junior Member
Joined: Sep 2021
Posts: 68
Likes: 22
From: Orange County, CA
2012 C207 E550 RWD
Thanks! I'm planning to put my stock springs back on but used brand new shocks with the H&R springs. I had similar crashy ride issues with two different coilovers, one of them being highly regarded Bilstein B16 PSS10s. Right now I'm thinking there could be an issue with my wheel bearing and knuckle since I think I'm hearing some whine from it but originally thought it was noisy tires. I might have messed up the install or have a bad knuckle since there is still play in the hub even after putting on new wheel bearings. I also noticed the driver side hub spins more freely than the passenger side (checked it with my brake calipers taken off and also made sure the bearing play was correct on both sides). My car keeps pulling to the right, even after several wheel/tire swaps and alignments so this might make sense with bad bearings?
Last edited by RosSauce; Oct 17, 2024 at 12:31 AM.
