I'm becoming convinced that I'll be replacing a wheel bearing in the future but not sure which one, yet. Based on my research, the wheel bearing assembly is a unit that is just bolted to the knuckle from the inside but it could be a tight fit. The job doesn't look hard if the bearing unit isn't seized to the knuckle; that's a big unknown but this car hasn't seen much winter salt so may be OK . The actual part is in the $50-200 range (RockAuto economy to dealer). I need for the noise to get significantly worse before I can locate the offending wheel. Thanks for the help. I haven't experienced problems with this type bearing before.
> -----Original Message----- > From: Peter Frederick via Mercedes > > Having just finished replacing the third wheel bearing on the Golf, I'd guess > a > wheel bearing, especially if they are similar to the MB rear bearings. > > Since those are double race ball bearings, they don't make the same noise as > tapered rollers when they go, they tend to hum, then growl, then howl and the > noise will change withe speed (because the tire is vibrating). Usually > accompanied by minor cupping on one side of the tread. > > The test is that the inner race is almost always the one that fails (due to a > failed > seal letting water and dirt into the bearing) and the noise will change or > vanish > when you un-load the bad race when turning. Sound will also change with > dips in the road as you change the loading on the bearing. > ... _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
