Closing Assist/Door Lock Issues Due to Pneumatic System Problems on Mercedes-Benz 400SEL

Problems with the pneumatic system can cause closing assist and door lock issues.

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Average mileage: 211,559 (178,000–271,000)
1 model year affected: 1993
4 people reported this problem
2 people shared problem details
driverside door assist does not work,only driver side door will lock auto.
The Pneumatic close assist system is very problematic. I have repaired this at all 3 San Diego MB dealers with no success..
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