Hi

I have a 2005 C350, and have had this noise that sounded like a wheelbearing. The MB techies and my friendly mechanic agreed that it was the wheelbearing.

I had both rear wheel-bearings replaced today, and much to my dissappointment, the sound is still there! I changed the tires as well and the sound still remains The vibrations from this are quite heavy, and get louder with speed. I can hear it at low speed too.

I remember that I went over a pothole maybe 2-3 years ago, which burst a tire, and may have affected the suspension (I have also had to replace the entire front suspension).

I'm not sure what could be wrong here, can anyone point me in the right direction? My next guess is to take it to an alignment place (even though the tire guys have aligned it when I bought the new tires).

 

Transmission mount? Driveshaft flex plate?

 

I am assuming that you are absolutely sure the wheels are balanced perfectly.

Drive shaft flex discs do wear out and can cause the vibrations.
Any other work done on/around drive shaft/differentials?

 

My folks and a very trying noise (it was loud!) from the back of their Honda Accord that sounded like bad bearings, turns out that it was the new tires that were not wearing evenly (defective) and had to get new tires and the noise went away. The bearings, alignment and suspension parts were all checked and were fine.

 

Yeah, I had Federal 595's, thought my car was going to blow up, just turned out to the tires!

 

Thanks for the suggestions. It turned out that my mech didn't put the new bearing in properly. He refitted the bearing an the noise went away!

(time to find a new mech I guess).

Now to fit the oxygen sensors (costs about $850 in South Africa).

 

Yeah - this problem is almost always tyres or bearing.