Changing key batteries

Discussion in 'Electronics' started by anderoo, Mar 10, 2017.

  1. anderoo

    anderoo Active Member

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    92
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    C350 coupe
    First, am I right in thinking that when I press lock/unlock on the key fob, if a little red light flashes it means that the batteries are running low?

    Second, when looking up how to change the batteries, I've seen some pretty uncomfortable stories about keys suddenly not working when old batteries are replaced with new ones. Is this something to worry about, or is it fine and normal to stick new batteries in yourself?

    Ta :)
     
  2. renault12ts

    renault12ts MB Club Veteran

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    Car:
    2005 W215 CL500.
    When I use my fob the red light always flashes...always has done, even with new battery.

    Yes...change your own battery (assuming you would also empty your own ash tray if used).
     
  3. OP
    OP
    anderoo

    anderoo Active Member

    Messages:
    92
    Joined:
    Jun 21, 2016
    Car:
    C350 coupe
    Cool, thanks - I hadn't ever noticed the red light, maybe it's always done it, I just wondered if it was a low battery indicator.

    Good news I can change my own batteries without the car freaking out!
     
  4. clk320x

    clk320x MB Club Veteran

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    The red light will always flash when you press the button...

    Its very very easy to both change the batteries or even reshell the entire key if your old shell is looking a bit tatty.

    £7 it cost me for a new shell and batteries, key is now good as new.:bannana:
     
  5. 190

    190 Hardcore MB Enthusiast

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    It is a low battery indicator. You'll know the batteries need replacing when the light doesn't come on !
    Seriously, that's what it says in the owners manual.
     
  6. clk320x

    clk320x MB Club Veteran

    Messages:
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    Guess my key is dodgy or battery must have been low for months :bannana:
     

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