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1996 Mercedes-Benz S420 Question: Power door locks and trunk lock



sampsonfam, Richmond, VA, January 31, 2011, 21:27

My power locks and trunk won't lock. I have to manually lock doors and strap trunk down. I checked all the fuses and changed the battery. What else can it be?

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  • Answer #1

    overbys from Overbys Inc, February 01, 2011, 13:41

    the doors locks and trunk soft-close are both controlled
    by electric vacuum pumps. central lock pump is under the rear seat and the trunk closure pump is in left side of
    trunk. either bad pump or a leak somewhere in the vacuum
    hose nightmare.

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  • Reply

    ynotu2, November 19, 2012, 21:57

    what is the next step to fix this issue. i have the same issue with my s420 Benz. It just don't work after the head light goes out than I replace the head light. I don't understand it at all.

    any advise please?

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