Test 2: Circuit 15
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. Measure voltage between ground and terminal No. 58 at breakout box. If battery voltage exists, circuit 15 is okay at this time. If battery voltage does not exist, repair wiring.