M-Class (W166) Produced 2012-2015

*REPLACE KEY BATTERY*

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Old Feb 3, 2013 | 01:22 PM
  #26  
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300D Turbo 1984
- Scenario - !

Lets say the battery dies and the remote is DEAD. You had it in your bag for the day and a pen or laptop was pressing on a button the WHOLE time draining the battery completely. Battery is completely DEAD & your M brace just expired. How does one get into the vehicle?

I don't see a key hole anywhere? It seems that electronically is the only way to get into the vehicle?

Ingenious huh?
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Old Feb 3, 2013 | 01:39 PM
  #27  
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Originally Posted by 300DTurbo
Lets say the battery dies and the remote is DEAD. You had it in your bag for the day and a pen or laptop was pressing on a button the WHOLE time draining the battery completely. Battery is completely DEAD & your M brace just expired. How does one get into the vehicle?

I don't see a key hole anywhere? It seems that electronically is the only way to get into the vehicle?

Ingenious huh?
you call road side assistance and they come pry your door open with an air bag.. .. if your roadside expired than you call a tow truck and they will do the same thing and charge you for it.
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Old Feb 3, 2013 | 04:48 PM
  #28  
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Originally Posted by 300DTurbo
Lets say the battery dies and the remote is DEAD. You had it in your bag for the day and a pen or laptop was pressing on a button the WHOLE time draining the battery completely. Battery is completely DEAD & your M brace just expired. How does one get into the vehicle?

I don't see a key hole anywhere? It seems that electronically is the only way to get into the vehicle?

Ingenious huh?
Isn't there a keyhole in the driver's door handle? Blade key in the remote.

Attached Thumbnails *REPLACE KEY BATTERY*-ml_keyhole.jpg  

Last edited by YYZ-E55; Feb 3, 2013 at 04:51 PM.
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Old Feb 4, 2013 | 12:03 AM
  #29  
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picked up my car today and sales guy explained the hidden blade in the remote and the keyhole for getting into the car in the event of a flat battery (wasn't sure if he meant flat car battery or flat key battery).
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Old Feb 4, 2013 | 03:18 AM
  #30  
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Haters crazy
Haha funny I just had this message come on about 3 days ago too... was thinking wow in 8 months needs new batteries already...
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Old Feb 4, 2013 | 03:05 PM
  #31  
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Buy Japanese replacement lithium batteries - earlier post should link you to Amazon where Jana made Maxell are like under $.35 each... MB brand replacement batteries from the dealer unfortunately are now made in Indonesia or China and are not that good at all.
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Old Feb 5, 2013 | 10:40 AM
  #32  
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Originally Posted by 300DTurbo
Lets say the battery dies and the remote is DEAD. You had it in your bag for the day and a pen or laptop was pressing on a button the WHOLE time draining the battery completely. Battery is completely DEAD & your M brace just expired. How does one get into the vehicle?

I don't see a key hole anywhere? It seems that electronically is the only way to get into the vehicle?

Ingenious huh?
There is an analog key in the remote. Surely it is explained in the manual or your dealer can demonstrate.
That said, the "Key battery low" warning appears on the dash well in advance of complete battery discharge. Replacement batteries are available very nearly everywhere.
Your scenario would border on gross operator error in my opinion.

Wayne
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Old Feb 5, 2013 | 09:31 PM
  #33  
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300D Turbo 1984
Originally Posted by venchka
There is an analog key in the remote. Surely it is explained in the manual or your dealer can demonstrate.
That said, the "Key battery low" warning appears on the dash well in advance of complete battery discharge. Replacement batteries are available very nearly everywhere.
Your scenario would border on gross operator error in my opinion.

Wayne
Thank you for that gentlemen. Security system goes off if you use the analog key...
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Old Feb 5, 2013 | 10:26 PM
  #34  
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Originally Posted by 300DTurbo
Thank you for that gentlemen. Security system goes off if you use the analog key...
Glad you found the keyhole.
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Old Feb 7, 2013 | 03:18 AM
  #35  
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Originally Posted by 300DTurbo
Thank you for that gentlemen. Security system goes off if you use the analog key...
I understand that it will go off, but once you pull out the stop/start button and insert the key, the alarm will silence. Fortunately I have not had to try it yet.
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Old Mar 9, 2013 | 05:31 AM
  #36  
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From: Hollywood Fla
Defender 90/360 Modena/2012 MLBTC on order
2 bucks...follow the simple video...replacement complete

Thanks to all...and 4 spare batteries !
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Old Mar 9, 2013 | 09:08 PM
  #37  
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Damn shame on the crappy Indonesian/China "MB" batteries plus Keyless Go is original BlueTooth which zaps remote batteries fairly quickly - all to the good this forum present cost effective solution... from my side I send 2 fresh Japanese lithiums to my customers on their 6 month new car "anniversary", but that's me !
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Old Nov 24, 2016 | 03:29 AM
  #38  
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mercedes c class 200
Originally Posted by 300DTurbo
Car is only 10 months old. The warning showed up for the spare key that never gets used but 4-5x/month.

Anyone else?
same problem car only one year old
warning with spare key the battery is made in indonesia CR2025 3v
the dealer workshop is looking at how to remove the message no feed back
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Old Nov 24, 2016 | 09:30 PM
  #39  
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Press lock on fob. Red light flashes on fob. No red light, battery low or "gone".
If gone, go to Batteries +. Have them test battery. Buy new battery.
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