Need to know the transmission model in order to answer this.
Need to know WHICH Mercedes engine, as there've been a couple. On an M2, you probably have either the 6.4 or the 7.2 engine.
Bad fuse, bad relay, bad switch, bad wiring... take your pick.
If it has one, it'll attach to the engine at the bottom of the oil pan, and, on some engines, the right side of the block.
Question's a bit too vague to be answered with any certainty. Most likely, you either have a short somewhere, or a bad relay.
The M2 family ranges from Class 5 to Class 8 trucks... weights vary greatly throughout, not to mention there's the matter of configuration (e.g., box van, dump truck, etc).
Attached to the brake pedal.
0776 N S/m2
Could be a number of things, and you'll probably have to get a digital multimeter to trace the problem. It could be a problem with the headlight switch, the dimmer switch, the wiring, the lamp harness, or the fuse panel.
If it's OEM installed, it should be directly under the door on the driver's side.
Disconnect the battery, keep it disconnected for five to 20 minutes, reconnect the battery.
Code 128 whats is that for. Would it be egr