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Does key in pos 1 drain battery?

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by d215yq, May 17, 2019 at 8:20 PM.

  1. d215yq

    d215yq Senior Member

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    Your Mercedes:
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    Not too interesting but i got a 2hr wait for a ferry and trying to charge my phone so may as well ask..To do that i need key in pos 1 (no ignition). If i turn radio off is that ok to leave a w124 with key in pos 1 for an hour or so. I assume the power hungry stuff comes on in position 2?

    Thanks in advance,
     
  2. Blobcat

    Blobcat Moderator

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    Why not charge your phone on the way to the ferry? It will drain in Pos 1, not that much but if your battery isn’t the best it could stop it starting...
     
  3. OP
    d215yq

    d215yq Senior Member

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    This time it's a ferry Valencia to ibiza, so the journey to the ferry was only 10 minutes! And the boat was delayed but as I'd checked in when I found out I couldn't drive home again... Perhaps the guy in front of me was equally concerned as he just left his engine running for the whole 1h45 minutes! In the end it was charging for an hour and started OK after...
     
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  4. Botus

    Botus Senior Member

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    I'd never leave the key on in a Merc.... the rear battery even when brand new is dead in 30 mins on the 221
     
  5. RhodiBill

    RhodiBill Senior Member

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    Yes.
    Not that I make a habit of it but on numerous different cars on numerous occasions I have had the Ign on Acc, that be Pos 1, for hours with the Radio/CD Player on, (quite loud) whilst Washing/Polishing the car.... Never had a problem.
     
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