I have 2 malfunctions, right lamp, right back up lamp on. All the bulbs are new genuine mercedes and the panel holding the bulbs have been replaced. The 2 malfunctions will only come on when the headlights are turned on. The lights work correctly at all times.
The SDS tells me it is the Front SAM (n10/1) or light switch module (S1). Has any one had this problem before?
I have another W203 that I could swap parts to help diagnose, if one of these parts are swapped from one W203 to another is there any programming that needs to be done?