Yeah ... meant pistons ... one for each side of the rotor on the rears ...
Can buy the problem alternatives ... just seems odd that it would be on BOTH rear brakes with no difference ...
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