siegfried_brown1
Mercedes G Klasse Emergency Call System Malfunction
Summary of the thread
A 2016 Mercedes G Klasse owner experienced a malfunctioning emergency call system, indicated by an error message and warning light. Diagnostic codes suggested a cable or plug connection issue, likely related to the telematics control module. While not a critical safety concern, resolving the issue was important. The problem was traced to a corroded connector, which was repaired at a workshop, restoring the system's functionality.
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4 comment(s)
siegfried_brown1 (community.author)
Thanks. The error is constant. I don't have the specific diagnostic codes right now, but they pointed to a connection problem. Where is the telematics control module located? I'd like to check the connections before taking it in.
ludwigeis82
A constant error suggests a hardware issue. Tracing the telematics control module wiring in a G Wagen can be difficult, and you could damage something else. Given that it's a car safety feature and you're seeing error messages, I'd recommend taking it to a workshop. They can properly diagnose and repair the wiring, which is probably faster and safer than doing it yourself, even if it seems like a simple cable.
siegfried_brown1 (community.author)
I took it to the workshop. It was a corroded connector, as suspected. 95€ later, the emergency call system is working. Thanks for the help!
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MERCEDES
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GKLASSE
ludwigeis82
Mercedes call failure issues can be tricky. Is the error constant, or intermittent? Knowing the specific diagnostic codes would help narrow it down. It's likely related to the telematics control module. While it's not a critical safety issue like brake failure, the emergency call system is important, so it should be resolved. Have you checked the telematics system fuses? Sometimes the solution is simple.