christopher-mann
How to Fix 'SOS Inoperative' Message on Mercedes C-Klasse?
Summary of the thread
A Mercedes C-Klasse owner is experiencing a general electrical malfunction, specifically an 'SOS Inoperative' message on the dashboard, despite the SOS system functioning correctly. Possible causes include a weak battery or poor connections. Suggested solutions involve checking the battery and connections, ensuring they are clean and secure, and using the Carly app to scan for error codes for further diagnosis.
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MERCEDES
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CKLASSE
CarlyMechanic
Start by checking the vehicle's battery and connections, as a weak battery or poor connection can cause electrical malfunctions. Ensure the battery terminals are clean and tightly connected. If the issue persists, consider using the Carly app to scan for any error codes that might provide more insight. Let me know how it goes or if you have any further questions!