Corrado135

Hi guys, first off let me just say I did some searching and have yet to find any thread with someone have the same symptoms as my C32's having . When driving the car is drives perfectly smooth with the exception of between about 36mph and 44mph ( Exact I know but that's when it's noticeable) I feel a pretty decent vibration that almost feels like it's coming from the rear of the car and seems like it changes with the speed of the car. There is no shake is at lower speeds and is perfect at 100mph and after looking under the car and checking wheel balance I can't seem to find what is causing it so the only things I can think is maybe driveshaft? Rear diff issue of some sort? Any input would be greatly appreciated!!!!!!

Zeppelin

It still could be the tires. Even though they are staggered on a stock C32 you can put the fronts on the back and the backs on the front just for a test drive. If the car is lowered you might not get the rear tires on the front.

Corrado135

Appreciate the input! However, I am almost 96% sure it has nothing to do with the tires due to the fact that when I balanced them ( Work for BMW ) I also did a road force test to see if the tires were out of round or had any heavy spots and they came out great which leads me to believe the issue is something more in the drivetrain aspect of things which is hard to diag when the car is up on a lift.

W203Ramos

i have the same problem and i gave up on it.....still had the vibration even after I bought new rims and tires. I also thought drive shaft but not likely....my last guess would be warrped rotors, the rear ones specificaly. I noticed that upon hard braking the vibration comes from the rear...I haven't change them since i got the car almost 10 yrs ago. I have 50,000 miles on the clock. I do plan to change all the rotors in a few weeks when I have a chance. GL

JUAN CASAUS

Check your transmission mount...they go out and are easy and cheap to replace.

Corrado135

I'm right there with you Ramos, my C32 just rolled over 60k so it's got plety of life left! Juan, thanks for the input, is something you had an issue with before and this helped you?

loudandheard

Your car definitely has a lot more life left, I have almost 160k miles on my car.


It could be your struts, strut bearings, or various suspension bushings?

Corrado135

Thanks, Loud. I don't see why struts/strut bearing's would cause the symptom I have especially since everything suspension related feels pretty tight. As far as bushings go that still could be a possibility but when I inspected them prior there appear to be no cracks or play, that doesn't mean something couldn't be bad though! Glad to hear you're at 160k!

JUAN CASAUS

I'm having that issue now and an getting ready to swap mine out. They are super cheap and interchangeable on many Mercedes models.

Corrado135

Great! Let me know if it improves it!

johnng117

I'm getting slight vibrations at high speeds only over 120km/h, i had all my wheels re-balanced and re-tracked. Still no good.
One thing i have notice is when braking hard at high speeds my brakes seem to judder a little, could it be the brake disks slightly warped which is causing the high speed vibrations.
I dont feel the steering wheel shake tho, also the brakes feel fine at normal driving speeds.
Any ideas?

W203Ramos

my thoughts exactly, but the question is do warped rotors cause vibration even w/o the brakes being applied? also the"judder" that i feel during hard braking isn't felt on the steering but the rear of the car. I'm hoping that changing the rotors will do the job since i'm due for them anyway. this guy from the scca porsche club said my rotors are warped because i used to ALWAYS put the park brakes on after using the car, thus, uneven cooling of the rotors....dunno if thats a fact or not.