Quote:
Originally Posted by clm
 Only seen one case of bearing failure? In my ten years of exprience of mercedes repair,I have had: 3-4 123's, 2 210,s , 1 140 and 1 107 car.I know thats not a lot compaired to the hundreds of cars I have worked on,but dont make it sounds like it never happens.ou mush have worked at a light duty shop or something.
And yes, I have had 2 catastrophic wheel bearings happen to me personally (not m.b.'s though)
310 bucks Is not too far off at dealership prices- I am sure they are 100 bucks an hour. They charged 2.8 hours to just replace the disks- Plus removing the hub, replacing the seals and packing the bearings . Its simple work, but it does take time and know how to do. Just depends if you want to get your hands dirty 
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Most cases of wheel bearing failure are do to improper service methods or the wrong grease being used.
I have changed bad wheel bearings, but none had failed; which is the paranoia being posted by others.