Question Details

I have changed batteries in my fob but as soon as I start car a message comes up to replace battery, I have tried 2 times and get same message.

thanks for your help

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MercedesMedic  2 months 2 weeks ago

I would remove eveerything else you got on the key chain and retry. Also try a new battery from a different supplier. If both batteries came from the same batch, they may be problem.

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