vincentlion2

S Klasse electrical anomaly and error messages

Has anyone experienced sporadic error messages related to various systems on a 2012 Mercedes S Klasse diesel? I'm seeing driving mode faults, warning lights, and audio/navigation failures. My OBD-II scan tool shows a possible defective cable connection to the BUS system.

4 comment(s)

I have a similar S Klasse and had comparable issues. Are you experiencing intermittent electronic failures? Did the scan tool give you specific codes, or just a general BUS system error? When I had this issue, it was a loose connector. Check all the relevant fuses before you proceed.

I observed U0155 (Lost Communication With Instrument Panel Cluster Control Module) and U110E (Lost Communication with Steering Column Control Module). Do these codes align with your experience, specifically pointing to a cable connection?

Yes, those codes are familiar. Given your report, I strongly recommend taking your vehicle to a qualified workshop. Tracing the specific wiring harness and ensuring proper connection integrity requires specialized tools and expertise.

I proceeded with the repair as suggested. The technicians identified a corroded connector on the CAN bus, leading to intermittent signal loss. The cable connection repair including diagnostic efforts amounted to 155€.

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