E-Class (W213) 2016 - 2023

replace battery in keyfob?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 11-04-2018, 11:04 AM
  #1  
Member
Thread Starter
 
nas2344's Avatar
 
Join Date: Jan 2018
Posts: 93
Received 14 Likes on 10 Posts
Lexus RX350
replace battery in keyfob?

i'm getting this message after owning the car for 11 months, how much time do i have before the battery completely dies?
Old 11-04-2018, 11:33 AM
  #2  
Senior Member
 
parkwood's Avatar
 
Join Date: Jan 2015
Posts: 446
Received 56 Likes on 45 Posts
EQC 4matic AMG line Premium Plus replacing S213 220d 4matic with airmatic
Not sure but if it does you will need to open the car with the metal key in the fob and then put the fob in the holder to start and run.
i usually change batteries no more than a day after getting the message. I have had a dead key before in a c class and i just got the key not recognised message.
Old 11-04-2018, 11:35 AM
  #3  
MBWorld Fanatic!
 
rbrylaw's Avatar
 
Join Date: Aug 2004
Location: Tampa, FL
Posts: 3,447
Received 327 Likes on 260 Posts
2019 E450 4Matic & 2018 E400 4Matic
I wouldn't delay on that. It's not difficult to do and there's a really good chance that after only 11 months, your dealer parts department will replace it for you without charge.

When you park, turn off your car and lock it, double lock it, by tapping the lock button twice to hear two horn beeps. You'll see the led on the front of your key fob light up for a second. What this does is stop your key fob from constantly looking for the car and it preserves battery life significantly.
The following users liked this post:
lensjack (11-04-2018)
Old 11-04-2018, 11:39 AM
  #4  
Member
Thread Starter
 
nas2344's Avatar
 
Join Date: Jan 2018
Posts: 93
Received 14 Likes on 10 Posts
Lexus RX350
Originally Posted by rbrylaw
I wouldn't delay on that. It's not difficult to do and there's a really good chance that after only 11 months, your dealer parts department will replace it for you without charge.

When you park, turn off your car and lock it, double lock it, by tapping the lock button twice to hear two horn beeps. You'll see the led on the front of your key fob light up for a second. What this does is stop your key fob from constantly looking for the car and it preserves battery life significantly.
do this each time i exit the car or once?
Old 11-04-2018, 11:40 AM
  #5  
Member
Thread Starter
 
nas2344's Avatar
 
Join Date: Jan 2018
Posts: 93
Received 14 Likes on 10 Posts
Lexus RX350
and what size battery does it take?
Old 11-04-2018, 11:43 AM
  #6  
MBWorld Fanatic!
 
rbrylaw's Avatar
 
Join Date: Aug 2004
Location: Tampa, FL
Posts: 3,447
Received 327 Likes on 260 Posts
2019 E450 4Matic & 2018 E400 4Matic
Originally Posted by nas2344
do this each time i exit the car or once?
Yes, every time you lock the car.

Originally Posted by nas2344
and what size battery does it take?
The keyfob uses a CR 2032 3V cell battery. Your owners manual details how to replace the battery on page 58.
Old 11-04-2018, 11:58 AM
  #7  
Member
Thread Starter
 
nas2344's Avatar
 
Join Date: Jan 2018
Posts: 93
Received 14 Likes on 10 Posts
Lexus RX350
What about locking from the trunk button that sounds the horn, does that have the same effect?
Old 11-04-2018, 12:06 PM
  #8  
Senior Member
 
parkwood's Avatar
 
Join Date: Jan 2015
Posts: 446
Received 56 Likes on 45 Posts
EQC 4matic AMG line Premium Plus replacing S213 220d 4matic with airmatic
Originally Posted by rbrylaw
I wouldn't delay on that. It's not difficult to do and there's a really good chance that after only 11 months, your dealer parts department will replace it for you without charge.

When you park, turn off your car and lock it, double lock it, by tapping the lock button twice to hear two horn beeps. You'll see the led on the front of your key fob light up for a second. What this does is stop your key fob from constantly looking for the car and it preserves battery life significantly.
Really good advice. It stops the key transmitting hence the power saving and therefore protects the key from being cloned as in the video.

https://youtu.be/AJb-P7TJFI0
The following 2 users liked this post by parkwood:
lensjack (11-04-2018), rbrylaw (11-04-2018)
Old 11-04-2018, 12:27 PM
  #9  
MBWorld Fanatic!
 
rbrylaw's Avatar
 
Join Date: Aug 2004
Location: Tampa, FL
Posts: 3,447
Received 327 Likes on 260 Posts
2019 E450 4Matic & 2018 E400 4Matic
Originally Posted by nas2344
What about locking from the trunk button that sounds the horn, does that have the same effect?
No, it doesn't. The only way to stop the fob from doing it is to double tap the lock button directly on the fob.
Old 11-04-2018, 12:42 PM
  #10  
MBWorld Fanatic!
 
JTK44's Avatar
 
Join Date: May 2018
Location: Long Island, NY
Posts: 1,945
Received 556 Likes on 419 Posts
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
Battery is covered under warranty and is replaced at normal service intervals.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: replace battery in keyfob?



All times are GMT -4. The time now is 01:39 AM.