Our W210 had leaking main seals, defective Air Mass Meter, defective ball joints, cracking dash, defective glow plugs, ACC problems, power window problems, defective EIS/Key problems, blower motors and some stalling problems that we thought was glow plugs but was never solved. The new owner has not experienced it, which means it might be gone?
The car was in the dealer constantly. Now, it was an amazing car when it was running properly. Smooth and torquey, it could easily run 1000km's on a tank of fuel and outrun most gasoline sedans.
1998 C230 "Black Betty"