Thanks, again ...
Larry - is it your impression I need to replace the tensioner bearing, then? And, that this is at the heart of my repetitive replacement of the shock?
Is there a chance that "this engine just does this?" Trying to think it out ... seems reasonable that the lack of proper belt tension from the tensioner could force the shock to do all the work and at a higher frequency than the shock is designed for?
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg