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Mercedes B Klasse Electric Sporadic Faults

My 2015 Mercedes B Klasse Electric is showing sporadic faults. I'm getting sporadic errors in driving mode or intermittently illuminated malfunction indicator lamps. Various systems are failing, mostly audio/navigation. Control units temporarily shut down or become unresponsive. Engine diagnostics show a stored error. Mileage is 41973 km. Could this be a defective control module connection to the BUS system?

4 comment(s)

Whoa, that sounds like a digital Christmas tree! Is the check engine light on solid, or is it just flashing? Have you tried any troubleshooting steps yourself, or just read the error code? That many systems going haywire suggests a central problem. Keep us informed.

The service required light is also on sometimes. How can I confirm it is the control module?

Confirming the control module definitively without proper equipment is tough. Given the symptoms and error codes, it does point towards a BUS system issue affecting multiple modules. A workshop with proper diagnostic tools will be able to pinpoint the exact cause. But it does sound like the cable connection of the control unit is defective.

Thanks, it was indeed the cable connection of the control unit. Repair cost was 155€. Appreciate the input.

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