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Q:

power locks are cattywampuss on 1997 Mercedes-Benz S320

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My power locking system is acting weird. The door locks don't go down in unision and the trunk will pop open by itself while I am driving. Is this a vacuum assist pump gone bad...appreciate any ideas.

CK
(1) Answer
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The locks going down as you mention can be caused by a leak in the system causing unequal vaccum to the different doors. The trunk opening while driving is unrelated and will need diagnosis. Good luck, Greg