I think that both of the statements above hold true in this case...We don't even own a brake lathe and do not EVER turn down rotors. Once below min, they will overheat quickly. The reason for the rear failure is the thin rotors cause the pistons to ride in a spot where years of buildup has produced rust, when this passes the seal, it will cut it and the seal will leak...
Sorry about the trouble.. Make the other shop pay for the damage and have the dealer repair it.
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM