Lately my 94 S500 has developed an intriguing problem with the alarm/keyless system.
Suddenly the keyless entry system does not work (yes I checked the batteries and tested with both keys) and further more when I lock the doors manually, the alarm light does not flash, it is as if the system has died. When I try to use the keyless system I get no lights at all, no red, no green on the door handle.