Mercedes EQC multifunction steering wheel issue

The multifunction steering wheel can be a nuisance when it malfunctions. Based on the symptoms and error description, a defective cable connection within the steering wheel is a plausible cause. Have you checked the fuses related to the steering controls? Also, is there any noticeable damage to the steering wheel itself, such as unusual looseness or signs of wear around the buttons?

I have inspected the relevant fuses, and they appear to be in proper working order. Furthermore, there is no readily apparent physical damage to the steering wheel assembly itself. The buttons exhibit no unusual looseness, nor are there any visible signs of excessive wear. Could there be any other potential causes for this issue besides the cable connection, or is it likely that a more in-depth vehicle diagnostics procedure will be required to pinpoint the precise nature of the electrical fault?

Given that the fuses are intact and there is no visible damage, the internal cable connection is indeed the most probable culprit. While other sensor issues could theoretically contribute, the symptoms strongly suggest a localized electrical fault within the steering wheel itself. At this point, I advise a qualified technician to properly diagnose and repair the issue. Continuing to operate the vehicle with a compromised steering control system may present safety risks.

I appreciate your advice. I will schedule an appointment with a qualified technician for a comprehensive diagnostic assessment and subsequent repair. As a point of information for others who may encounter a similar predicament, the repair entailed replacement of a faulty wiring harness within the steering wheel, with a total cost of 95€. Thank you again for your assistance.