rudolfcrystal82
Mercedes CLA system errors and warning lights
Summary of the thread
A 2015 Mercedes CLA is experiencing random error messages related to driving mode, warning lights, and failures in the audio and navigation systems, with control units occasionally shutting down or freezing. An OBD-II scan indicates an error, and a potential cause could be a bad cable connection to the control unit's BUS system. A similar issue was resolved by fixing a bad connection, suggesting that checking and possibly replacing the cable connections at a shop might solve the problem.
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4 comment(s)
rudolfcrystal82 (community.author)
Thanks for the reply. The warning light is random, sometimes on, sometimes flickering. And yes, the 'Service required' message has appeared now and then. Can you tell me more about what happened with yours and how it was fixed?
denniseagle89
Okay, random lights and service warnings sound very familiar. The shop found a bad connection. They changed a cable, and the problem went away. With your error codes and what's happening, it sounds like a similar cable problem on the BUS system. I'd suggest having it checked at a shop.
rudolfcrystal82 (community.author)
I appreciate the advice. Based on what you experienced, I'll take it to a shop to have the cable connections checked carefully. The invoice was 155€. Thanks again!
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MERCEDES
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CLA
denniseagle89
That sounds frustrating. I had a similar problem with my Mercedes before. Warning signal, system failure – the whole thing. Was your warning light on all the time, or did it flicker? Did the service required indicator show up too? I wonder if it's a BUS system issue.