Red Light Flashing on Key
12-04-2016, 09:40 PM
#1
Junior Member
Thread Starter
Join Date: Feb 2016
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
'13 E550 Sedan, '15 S550 Coupe, '15 RR Autobiography
Red Light Flashing on Key
Hi all,
Recently my key started flashing a red light night the panic button every time I press any buttons (lock, unlock, open trunk). I read that this could mean my key battery was low but I'm not getting a warning when I start my car. Any ideas as to what this could mean?
Thanks
Recently my key started flashing a red light night the panic button every time I press any buttons (lock, unlock, open trunk). I read that this could mean my key battery was low but I'm not getting a warning when I start my car. Any ideas as to what this could mean?
Thanks
12-05-2016, 09:20 AM
#2
Super Member
Join Date: Feb 2013
Location: Maryland
Posts: 580
Likes: 0
Received 62 Likes
on
61 Posts
2013 E550 4Matic
I'm responding to this thread because when I initially saw your username I thought it said "colon biter" which is my new favorite insult 
As for your issue, it probably is a low battery. I had a dead battery in one of my fobs and it didn't unlock the car or start it (I have Keyless-GO). I think it's a CR2025 battery, but I might be wrong (maybe CR2032). It's easy enough to pop off the back of the fob and check for yourself. If you don't have Keyless-GO, you probably won't notice this because you have to put it into the ignition slot and it should still work that way (my Infiniti fob worked if you put it in the slot, and it also had the keyless feature, so that's how I figured out that fob had died too).
As for your issue, it probably is a low battery. I had a dead battery in one of my fobs and it didn't unlock the car or start it (I have Keyless-GO). I think it's a CR2025 battery, but I might be wrong (maybe CR2032). It's easy enough to pop off the back of the fob and check for yourself. If you don't have Keyless-GO, you probably won't notice this because you have to put it into the ignition slot and it should still work that way (my Infiniti fob worked if you put it in the slot, and it also had the keyless feature, so that's how I figured out that fob had died too).
Last edited by blegthbloo; 12-05-2016 at 09:25 AM.
12-05-2016, 11:59 AM
#3
Out Of Control!!
Join Date: Jul 2003
Location: North Scottsdale, AZ
Posts: 15,903
Received 4,417 Likes
on
3,146 Posts
'71 Pinto
If you have keyless go it may be responding to wakeup request. Attachments cover battery.
The following users liked this post:
need2speed (12-05-2016)
12-05-2016, 04:37 PM
#4
Junior Member
Thread Starter
Join Date: Feb 2016
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
'13 E550 Sedan, '15 S550 Coupe, '15 RR Autobiography
I'm responding to this thread because when I initially saw your username I thought it said "colon biter" which is my new favorite insult
As for your issue, it probably is a low battery. I had a dead battery in one of my fobs and it didn't unlock the car or start it (I have Keyless-GO). I think it's a CR2025 battery, but I might be wrong (maybe CR2032). It's easy enough to pop off the back of the fob and check for yourself. If you don't have Keyless-GO, you probably won't notice this because you have to put it into the ignition slot and it should still work that way (my Infiniti fob worked if you put it in the slot, and it also had the keyless feature, so that's how I figured out that fob had died too).
As for your issue, it probably is a low battery. I had a dead battery in one of my fobs and it didn't unlock the car or start it (I have Keyless-GO). I think it's a CR2025 battery, but I might be wrong (maybe CR2032). It's easy enough to pop off the back of the fob and check for yourself. If you don't have Keyless-GO, you probably won't notice this because you have to put it into the ignition slot and it should still work that way (my Infiniti fob worked if you put it in the slot, and it also had the keyless feature, so that's how I figured out that fob had died too).
So the light has always been blinking and I just haven't noticed it? The first pictures says the battery is working properly if the check lamp lights up..
12-07-2016, 01:13 PM
#5
Junior Member
Join Date: Sep 2016
Location: Arizona
Posts: 47
Received 0 Likes
on
0 Posts
2014 Mercedes Benz E250 Bluetec
Well, I didn't see the red light flashing and the message on my dash about my key fob battery but my car couldn't find the key so I replaced it and it did the trick. Mine's equipped with Keyless GO.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
12-08-2016, 05:08 PM
#6
MBWorld Fanatic!
Join Date: Feb 2014
Location: MA
Posts: 6,080
Received 1,467 Likes
on
1,148 Posts
2008 E350 4Matic, 2011 E350 4matic
Well, I didn't see the red light flashing and the message on my dash about my key fob battery but my car couldn't find the key so I replaced it and it did the trick. Mine's equipped with Keyless GO.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
12-10-2016, 01:23 AM
#7
Junior Member
Join Date: Sep 2016
Location: Arizona
Posts: 47
Received 0 Likes
on
0 Posts
2014 Mercedes Benz E250 Bluetec
Trending Topics
12-12-2016, 10:00 PM
#8
MBWorld Fanatic!
Well, I didn't see the red light flashing and the message on my dash about my key fob battery but my car couldn't find the key so I replaced it and it did the trick. Mine's equipped with Keyless GO.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
How are you guys getting the Low Key Battery Warning messages, it never showed up on mine? Just says that it couldn't find/recognize the key at the time.
My car says "Replace Key Battery", which I understand it is telling me battery is getting weak. Everything still works fine at this point though.
