raverx3m

what else besides engine mounts can cause vibration while driving on freeway and accelerating

it feels like unbalanced driveshaft or engine mounts. but driveshaft is well hidden on this car im assuming its not a common issue with 2011 c300 4matic

i know engine mounts are worn out slightly just wanted to see what else can it be.
wheels have been checked for balance. they are good. brakes are good.

RobertR728

It's just a car in reality even tho it's a fancy car. So you need to keep it simple and start with the basics. Check every front end part for wear suspension and steering. Check the drive line meaning engine mounts trans mounts and the flex discs on the drive shaft. And check the rear suspension for any problems. Doing that should find the issue with almost any shake or issue.

JettaRed

iTrader: (1)

When did this start? How many miles on the car? Any particular speed? Do you feel the vibration in the steering wheel or your butt?

raverx3m

Just bought the car 194k
im feeling it through gas pedal and butt and center console

i know engine mounts are shot
im asking what else can cause vibration in this car

JettaRed

iTrader: (1)

Wheel balance. Drive shaft balance. Bad shocks. CV joints. To name a few.

antboii

@raverx3m , hey - as suggested youll want to check the drive line.

When I picked up my c250 there was a slight steering wheel vibration on the highway. It ended up being the front brake rotors. Engine mounts wouldnt make a drive line shake cruising down a flat highway. That would shake the whole car at idle, and or you would hear rattling at idle. I had also replaced the engine mounts in my c250. It would rattle the exhaust at idle.

Check the below-

-check brake rotors
-check motor mounts
- front drive shaft axle u joints
- check tires. They might be worn unevenly.
- if tires are wearing unevenly, check tie rods/control arms.
- you might need an alignment? If you just bought the car and they changed front end parts and never got an alignment that could be the issue.
-check rear subframe for rust/rot - the w204 had a subframe recall where they rot out. I had mine replaced as I would get a bad sway on the highway if I hit a bump.

Hope this helps and keep us posted!

Ant