Fault codes aren't possible on ASR/ABS systems on these cars as the computers don't have any MEMORY. Only cars with Electronic fuel injection have traction control systems w/readable computers. Diesels never had ASR but started with ASD & now ETS. If the car is a 300TE then the accelerator potientiomer is the most common failure on M103.
MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V