How do you fix the power locks on a Mercedes-Benz 1986 190E the outside key will lock the doors but won't unlock them?

In: Mercedes-Benz 190-Series

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The door/trunk locks run off a vacuum system. The pump is located under the rear seats. If you have this sort of problem with the locks, you can typically hear the pump continuing to run for perhaps 45 seconds after you have locked the doors/trunk. Diagnosis: you need a new lock, or a vacuum line has a leak. Either way it's a relatively simple repair for your mechanic. Of course, if you have a Chilton's, and want to trace the lines or replace the lock, then you can DIY.

First answer by ID1112642902. Last edit by ID1112642902. Question popularity: 43 [recommend question]

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