Key issue
Thread Starter
Newbie
Joined: Apr 2018
Posts: 1
Likes: 0
2009
Key issue
Hello, I have W204 2009, suddenly one key working perfect and the other one not detecting very much!! I mean need to be very close from the car to lock the door and turn car ON.
I changed the battery but still the same
Please for your help and advice.
Thank You
I changed the battery but still the same
Please for your help and advice.
Thank You
Super Member
Joined: Feb 2007
Posts: 809
Likes: 74
From: Dallas, TX
2008 E63 wagon (1 of 62)
If you have 1 key working normal and the other key is not working normally, then you already diagnosed it for yourself. More than likely something is wrong with the key that is not working normally. You'll have to visit the dealership to order a new key for the vehicle if this issue concerns you.
Junior Member
Joined: Jul 2015
Posts: 40
Likes: 6
From: SF Bay Area, CA
G63
Are you sure the new battery you put in has full charge? I say this because I bought a pack of batteries on Amazon and they were almost dead. If you don't want to take a volt meter to the batteries then you may want to swap the batteries between the good key and bad key just to be sure.
Senior Member
Joined: Feb 2013
Posts: 390
Likes: 37
From: Melbourne, Australia
2010 C63 and 2018 GLC63s
I have found my key remotes fussy re batteries - a brand new premium brand battery will not work yet the next one in line in the blister pack will work fine. Both batteries will be good on the volt meter.
Swap the batteries over between remotes.
I keep my keys in a"faraday" box as my front hall table is cloe enough to the C63 to communicate.
Swap the batteries over between remotes.
I keep my keys in a"faraday" box as my front hall table is cloe enough to the C63 to communicate.
Member
Joined: May 2016
Posts: 113
Likes: 4
From: Rocklin, CA
'15 AMG GLA45
These key fobs eat batteries faster than any other car I've owned. It's not a huge deal but I'll start randomly getting "key not detected" messages on the dash about 2-3 weeks after replacing the battery. I can usually get another 1-2 weeks out of the battery at that point. I've tried all different brands of batteries and it's the same thing.
