Rear wheel bearings

[Scott Elliot Gilman]

What are the most common sounds/indications of an impending rear wheel  
bearing failure?  I have just over 105K on my '91 20 valve 200 so  
hopefully there will be plenty of trouble-free miles, at least as far  
as the bearing issue.  I have had so many other problems over the  
years, even with a relatively low mileage car.  Latest issue was  
transmission braces.  However, my Audi is a keeper for me, since I  
bought it new.  Appreciate the help.

Scott
NYC