Key Fob Battery Warning Mercedes A Class Premium Plus (Facelift)

JamieJ

New Member
Joined
Dec 5, 2021
Messages
4
Location
In the year 2077
Car
Mercedes A Class AMG Premium Plus (Facelift)
The key still works. Just got a warning about replacing the battery today in the instrument cluster.

I was warned if I changed the battery the key may need to be re coded.

I can't find any info online about this and if it is required. Thankfully I have 2 original fobs.

If I change the battery on the key fob (which is still alive and working just low) is this ok or would need recoding.

Thanks for any advice. Hoofully people have tried and can tell me for sure.
 

MSG2004

Active Member
Joined
Feb 5, 2005
Messages
541
Car
GLE, AMG Line
Changed battery several times on my 2016 GLE all ok, no code required.

Anyone reading this thread take note on the gLE and poss other models the doors will open/lock as well as the tailgate but windows stop working when battery is low and no warning given. Changing battery resolves this. I often open the windows and tailgate in hot weather before i get into the car and clean wet/misted side windows so find the auto open close useful
 

johnsco

MB Enthusiast
SUPPORTER
Joined
Nov 22, 2008
Messages
2,287
Location
Leeds, West Yorkshire
Car
E280CDI SPORTS ESTATE and C200 KOMPRESSOR SE Coupe Auto (1.8 lit petrol)
I've changed loads of MB key batteries over several models over many years.
(Three of them in the last 3 months).
I've never heard of having to have the key re-coded.
Don't delay - Do change the key batteries.
The batteries last a long time, but when they near the end of their life, the voltage suddenly drops quite quickly and the key stops working.
 

Spider10

MB Enthusiast
Joined
Aug 2, 2020
Messages
2,114
Location
Notts
Car
c63 amg w204 now w205 c63
MB change mine as part of the service 😁
 

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