Once the servo assist stops working on one or more doors it signals that the pump is out of comission. It will do it only in one door, alternate between various doors or the trunk. Usually the pump controls all doors and the trunk through independent vacuum lines, although I don't think they can independently be turned off for a certain door.

The #9 fuse reset will help for a very SHORT while, but be prepared to change the pump sooner than later.

The servo assist pump for the doors and trunk is located on the trunk, driver's side, behind the upright panel just under the speakers. The pump under the rear seats controls the power locks and the lumbar support on seats. Completely different pump. Both pumps are expensive to replace $$$.

As mentioned, many forums have tailored with the idea of adjusting the pumps, although it seems the only real way to solve the problem is a new pump. Good luck!

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]