siegfriedroth1

Mercedes CLA Key Battery Issue

My Mercedes CLA, build year 2023, hybrid engine, is showing a 'key battery low' warning on the instrument panel. Keyless access isn't working, an error is stored, and unlocking/locking is impaired. I think the key fob battery is dead. Any advice?

4 comment(s)

I had a similar issue with my CLA. The key fob became completely unresponsive. Have you tried using the spare car key to see if that works? If so it's probably the fob battery. I had to replace my car key battery at some point.

Thanks. The spare car key works fine. Can you tell me what kind of battery the car key needs?

It’s likely a CR2032 battery, but check your owner's manual to be sure. If you're not comfortable doing it yourself, the dealer can replace the fob battery. Parts and labor cost me 37€, but the price may be different now.

I replaced the key battery and the key is working now. Problem solved.

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