W204 / C204 2013 Key Issue - Spare suddenly dead

Knuckle89

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Jul 22, 2017
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Your Mercedes
B180
2013 C class - Normal mercedes key not keyless entry or start.

I went to use the spare key today and it wouldn't unlock the car, once opened with the other key i also found it wouldn't start the car, turning it does nothing at all.

The battery didn't seem flat (red LED lights on press) but changed it anyway. Hasn't resolved.

The key has been in a safe for a year, it was used by the garage during service at least once in my ownership and the blade definitely fitted the door so it's the right key (i.e. not a mix up at the garage etc ).

So has anyone experienced this and more importantly know how to reprogram it ?
 


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