"Replace key fob battery" message Ml350 2014
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Member
Joined: Jan 2020
Posts: 129
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From: cheshire uk
ml350amg slk 320
"Replace key fob battery" message Ml350 2014
I am again getting a "change key batteries" message .
I have replaced with new but message will not go out.
I believe there may be a fix.
Can anyone advise please, it's driving me mad!
Thanks
I have replaced with new but message will not go out.
I believe there may be a fix.
Can anyone advise please, it's driving me mad!
Thanks
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,569
From: unbegrenzt
2017 GLE350 4MATIC
Antennae on MB SUVs have been known to require replacement. There are several receiver antennae distributed throughout the vehicle. Do you get the message when the key is placed in each of the four seats while the engine is running?
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,011
From: Miami, FL
2003 CL 600
Test the voltage on the new key battery. I've seen many come out of the package at 2.8 or lower. A good healthy one will be 3.2ish. The warning messages start when it drops to about 2.7 so a weak new battery can be bad enough to not even clear the warning. I always put a meter on them when replacing before I suspect anything else in the car.
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
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From: Ft. Lauderdale Area, USA
2015 ML 350
I also believe that having both keys in the car, close to the start button somehow weakens the fob batteries faster. (Probably superstitious behavior, but a nagging suspicion.)
