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-   -   Rechargeable key? (https://mbworld.org/forums/e-class-w213/702340-rechargeable-key.html)

nas2344 03-23-2018 08:45 AM

Rechargeable key?
 
My car is having a hard time detecting my key and the car is brand new with 1100 miles, I gotta recharge this key?

ua549 03-23-2018 08:57 AM

The key can not be recharged. It uses an inexpensive button battery that should last for years.

nas2344 03-23-2018 09:18 AM

How do you open the key to replace the battery?

Egonvdv 03-23-2018 09:57 AM

you look in the manual

https://cimg2.ibsrv.net/gimg/www.mbw...03d1f4d340.png

nas2344 03-23-2018 10:04 AM

Thanks, that helped since I donít have the manual next too me

petee1997 03-23-2018 10:44 AM

The batteries don’t last for years because they are always sending a signal. My dealer replaces both batteries when I do my annual maintenance as part of the service.

ua549 03-23-2018 12:18 PM

On my previous car the original battery was replaced at 4 years with another replacement when the car was 9 years old. IMO a key fob transmits only when a button is pushed or it responds to a transponder signal. Otherwise battery replacement would occur more than once a year because those 3v batteries do not have very much power.

Cao Black 03-23-2018 03:46 PM


Originally Posted by nas2344 (Post 7411651)
How do you open the key to replace the battery?


elnos 03-23-2018 09:39 PM

before changing your key fob battery, you might consider this
when you lock your car using key fob, if you press "lock" twice, the car will automatically set to "sleep" and won't receive any signal from key anymore. So if you come close to the car and grab door handle, it won't recognize it.


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