W124 no power after charging battery

Discussion in 'Electronics' started by Dickie14, Nov 4, 2018.

  1. Dickie14

    Dickie14 New Member

    Messages:
    19
    Joined:
    Apr 6, 2014
    Car:
    W124 E220 Coupe
    Hi guys

    Left my E220 coupe with the interior light on and drained the battery... So I removed it, charged it, put it back in and went to start the car. There was a pop like a fuse blowing and then nothing - completely dead. There's 13.2V at the battery, double checked I hadn't got the polarity wrong and none of the fuses in the fuse box are blown. What have I done? Is there some master fuse somewhere that I've somehow popped?

    Cheers,
    Dickie
     
  2. kid-jensen

    kid-jensen Hardcore MB Enthusiast

    Messages:
    1,178
    Joined:
    Dec 16, 2002
    Location:
    Epsom Downs
    Car:
    ML 320 W164
    There's an Overvoltage Protection relay that is notorious for giving this problem.

    Unfortunately, I can't remember where it is..

    I good Google should narrow it down...
     
  3. brucemillar

    brucemillar MB Club Veteran

    Messages:
    8,663
    Joined:
    Nov 18, 2010
    Location:
    Next Door to Alice - 25 'kin years now
    Car:
    C55 AMG Wagon - W124 300te 4matic Wagon - BMW 4.8is X5 E53 - SWB Pajero 3.5 V6 24v
    On the 124 the OVP Relay is situated behind the battery. There is a floppy plastic pull out cover that, when pulled out gives you access. The OVP has two blade fuses.

    Your battery voltage does sound to be too high at 13.9? It may just pop your fuses again.


    Sent from my iPhone using Tapatalk
     

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