Key fobs
09-28-2022, 09:05 PM
#1
Junior Member
Thread Starter
Key fobs
2009 C63. I’ve always had an issue with one fob, always says change battery. Battery is alway fine. Cleaned all contacts, still same message. Anyone have same issue and know a fix? Thanks
09-28-2022, 11:59 PM
#2
MBWorld Fanatic!
Either a bad key, or you're keeping it too close to the antenna. A lot of new current production cars can't read the key if it's in the cup holder. If it's in your pocket then it's the key.
09-29-2022, 01:05 AM
#3
Super Member
On that note
If you need an Extra key, do you HAVE to get it from the dealer or is there a way to program another key to your car?
If you need an Extra key, do you HAVE to get it from the dealer or is there a way to program another key to your car?
09-29-2022, 08:15 AM
#4
Member
Had to show title and registration as well to get order approved.
OP, I had that and I switched to a 2032 battery, after a day or so the message finally went away, not sure if that will work for your situation or not.
09-29-2022, 08:58 AM
#5
Senior Member
Join Date: Jan 2018
Location: Whitehouse Station, NJ
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2012 C63 P31 Sedan
Was also going to mention that a CR2032 does fit. It's just a bit thicker than the original CR2025. Same voltage, but more capacity and should last longer.
09-30-2022, 09:56 AM
#6
They do fit. I put one in my accident when I first got the car. When it finally ran down many years later I had a tough time getting the battery out but it was doable.
