Replace key

[Rexsdad]

Hi
I just got my w212 hybrid back from the body shop. I noticed a message saying REPLACE KEY nothing else. I guessed it was the fob battery so I replaced that twice and the message is still there. The key works fine I don't have a start button just put the key in turn it and go. Any ideas how to get rid of the message or is it actually telling me to change the fob.

 

[markjay]

Are you sure that this isn't a scrolling message that says "REPLACE KEY BATTERY"?

Also, are you using CR2025 or CR2032 batteries?

 

[Rexsdad]

Hi Thanks for the prompt reply.

The message doesn't scroll . I am usingCR2025 as that's what it says in the manual. I've tried an energiser lithium and a Varta. Both were newly purchased and had readings of over 3 volts.

 

[ALFAitalia]

Maybe not much help....but this was posted a while back.

C250 CDi 2012 "Replace Key" message on dash | Electronics and Audio

Hi Guy as per the title, I changed the battery in my spare key which worked but now i get the error message "REPLACE KEY" when using that key. The original main key works fine. The key with the problem still unlocks the car, starts the engine, everything works apart from that error message...

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