Mercedes W211 Bj 2002, the electronics does not work inside

Question

I'm new here and just trying to get help here before I go completely crazy ??

I have a Mercedes W2 111 built in 2002 270 CDI. I've been to several workshops and nobody can help me everyone says something different and I'm really desperate now.

The following things have recently stopped working in the car: indicators, horn, window regulator, heating and central locking no longer work. When I remove the key, everything lights up in the AI. Recently the vehicle beeps even when it is driving because it indicates that the parking brake is applied even though it is not. I'm nervous at the end and just need advice on what it could be.

Ps. The car starts and just stops the electrical system does not work.

Answer 1

Sounds like a CAN bus error.

Turn signals, horn are controlled by the SAM driver,

Window regulator is clear

Heating is controlled by the air conditioning control unit primarily and secondarily depending on the task of SAM drivers,

Central locking is controlled by the SAM rear.

EZS could be the problem here even without an error memory entry. Or a control unit that is defective or was under water. Or the CAN distributor in the driver's footwell / cable duct got wet.

Answer 2

Take out the floor mats and dry everything. In the footwell on the passenger side there are control units and a fuse box. On the driver's side, the seat heating SG would be installed under the seat under the floor, as well as the CAN distributor in the cable duct on the driver's side, as I wrote above. Go find it. Your problem will be there. Also look at the equipment box in the engine compartment if the water ingress was on the driver's side. There, the SAM driver, Motor SG and your ESP are installed in the foreman.