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Help, Boot locked and battery disconnected jump start under the bonnet doesn't work.

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by TomP83, Sep 13, 2017.

  1. TomP83

    TomP83 New Member

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    Your Mercedes:
    CLK/2000/200
    Hello,

    I have an old 2000 clk and have a big problem.

    I disconnected the battery and shut the boot. The boot locked itself and now I can't get in it to fit the new battery.

    I have been in a situation before where the battery had gone flat with the boot shut and I used the jump start under the bonnet to power up the boot open switch with a battery charger. From what I have read this can be done with the battery disconnected however I have tried and nothing, it doesn't seem to put any power in at all. I have checked fuses and they seem ok.

    I really don't know what to do?.. any help would be much appreciated!
     
  2. OP
    TomP83

    TomP83 New Member

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    Your Mercedes:
    CLK/2000/200
    Sorry - I should also add I don't have the mechanical key.

    Thanks
     
  3. flowrider99

    flowrider99 Senior Member

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    Your Mercedes:
    ML350 (W166) .............. SL500 (R230) ................
    open the boot with the key.
     
    S5000L likes this.
  4. flowrider99

    flowrider99 Senior Member

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    Your Mercedes:
    ML350 (W166) .............. SL500 (R230) ................
    Bummer.
     
  5. LostKiwi

    LostKiwi Senior Member

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    Your Mercedes:
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    Instead of using a battery charger (which may not give any output if the charger doesn't detect a minimal voltage present) try using a connection from the new battery.
     
  6. EmilysDad

    EmilysDad Senior Member

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    What kind of 'key' do you have then? Bear in mind the mechanical blade lives in the side of a Merc key/fob
     
  7. Droverunner

    Droverunner Senior Member

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    Your Mercedes:
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    Did this recently with my old BMW 5-series but luckily it's an estate so I could release the back seats and crawl through to reconnect the battery.

    I too am not surprised a charger won't do it... so would also say use the battery connected to the underbonnet terminals.
     
  8. Arzaam

    Arzaam Senior Member

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    Your Mercedes:
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    yep as above you'll need to try a jumper pack or a battery. if for some reason that still doesn't work and you cant figure it out then there are some jump starters that provide power through the power outlet in the interior maybe that'll be enough to open the boot and also I saw one guy once failing all that undo the connections to the license plate bulbs and apply 12V momentarily to that which was enough to open the boot and same can be done with the start motor live wire, again these are very far fetched methods, with a battery across the jump terminals you should be fine. most chargers if they don't detect the battery won't even start charging or providing any power maybe thats why that didn't work.
     
  9. OP
    TomP83

    TomP83 New Member

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    Thanks so much to all the response! I lost the mechanical key a while back - a long story but I hooked the new battery up with some leads and it worked! Must have just not liked the battery charger. Thanks once again problem solved.
     
    daibevan and Arzaam like this.

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