Keyless Go Battery
Member
Joined: Aug 2008
Posts: 233
Likes: 13
From: Brisbane, Australia
C43 AMG Sedan Update GLE 43 SVU - A200 W177
Funny you should say that... I've gone through about 2 batteries in just over 2 years. My non keyless MB has been going 3 years on the original battery.
Maybe it's just a keyless thing.
Maybe it's just a keyless thing.
Super Member
Joined: Feb 2012
Posts: 620
Likes: 7
From: Sacramento, CA
'09 C63
I think that's normal. Apparently, the keyless go is always searching for car and thus uses up the battery quite a bit. I also heard that placing it around metal also depletes its life faster...not sure if there's any truth to this.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Yes they eat batteries at a fantastic rate, I got a 12 year old Tiburon still on the original fob battery, but it does not sound the same when started 
. Usually a fresh set very year to year and a half.
. Usually a fresh set very year to year and a half.
Super Member
Joined: Feb 2012
Posts: 620
Likes: 7
From: Sacramento, CA
'09 C63
Batteries should have some juice when it's running low, and a few gentle taps to the key fob should generate enough juice for you to start the car to drive to the nearest store that sells that battery.
Or just have a few spares in the car as someone suggested earlier.
Trending Topics
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
The guys are correct the doors will usually still open but you will notice a diminished distance as the batteries get low and the car will tell you to replace them long before they go dead. But it is my understanding that if completely dead use the manual key to open the door and then insert the fob into the dash and turn key as in a other car. Keyless go will not work with dead batteries. Or get the other fob out of the wifes' purse
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Oct 2013
Posts: 352
Likes: 2
From: Montreal, QC
2013 C63 coupe P31
So I assume the car doesn't charge the key?
My previous bimmer was charging the key when it was inserted in the slot, which was nice. It was also telling me when the key's battery was low.
That been said I still had to change the battery after 3 years.
My previous bimmer was charging the key when it was inserted in the slot, which was nice. It was also telling me when the key's battery was low.
That been said I still had to change the battery after 3 years.
MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,744
Likes: 8
From: Sydney, Australia
2010 C63 Estate
BMW was great for the key charging thing.
But yes, batteries dont last forever when with BMW charging.
Still need to be replaced.
Back to our benzes though, if battery is dead, can still pop keyless go button out, and insert key into ignition to start car i think.
As for getting in the car, with battery dead, yes, emergency key will manually unlock drivers door, and trunk.
But yes, batteries dont last forever when with BMW charging.
Still need to be replaced.
Back to our benzes though, if battery is dead, can still pop keyless go button out, and insert key into ignition to start car i think.
As for getting in the car, with battery dead, yes, emergency key will manually unlock drivers door, and trunk.
MBWorld Fanatic!
Joined: Jan 2013
Posts: 3,745
Likes: 811
From: The Great White North
W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, Taycan GTS Sport Turismo, C5 Z06 & IS300 race cars
MBWorld Fanatic!
Joined: Jan 2013
Posts: 3,745
Likes: 811
From: The Great White North
W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, Taycan GTS Sport Turismo, C5 Z06 & IS300 race cars
It's keyless go. You don't insert the key anywhere - just keep in on your person or in your briefcase.
