Test 15: Wiper System Circuit 31B
WARNING: This page is about a different car, the 1996 Mercedes-Benz E320 and 1996 Mercedes-Benz E300. However, it is still accessible from the selected car via links, so may be relevant.
Using Harness Adapter (210 589 01 63 00), connect Breakout Box (129 589 00 21 00) to combination control module. Turn ignition switch to RUN position. Ensure wiper arms are in PARK position. Measure voltage between ground and terminal No. 40 at breakout box. If less than one volt exists, wiper system circuit 31B is okay at this time. If greater than one volt exists, check wiring. If wiring is okay, replace wiper motor.