Why can't the driver's seat of a Mercedes-Benz be adjusted?

[EmmanuelLynn]

Mercedes-Benz driver's seat adjustment failure is due to wiring issues. The following are the inspection and measurement procedures for the vehicle: 1. Inspection: Check the power supply and grounding of the right front seat fuse, both are normal; upon removing the connector of the right front seat control unit, signs of water corrosion were found on the connector, and visual inspection also revealed water corrosion on the right front seat control unit; check the air conditioning drainage outlet is normal, and the sky drainage is normal; inspect the front and rear carpets for no wetness or water accumulation, the right front door window lift operates normally; external water collection trough drainage is normal with no blockage, conduct a leak check at the right front door area of the vehicle, no signs of leakage were found. 2. Measurement: Measure the seat control unit wiring harness for no open or short circuits, power supply and grounding are normal, CAN line is normal; measure the right front seat adjustment switch wiring harness for no open or short circuits, the connector shows no corrosion, and the pins are properly connected without looseness.