Closing Assist/Door Lock Issues Due to Pneumatic System Problems on Mercedes-Benz 600SEL

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 87,000 (87,000–87,000)
2 model years affected: 1992, 1993
3 people reported this problem
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Just using the the key fob door lock/unlock remote, the driver rear door is slow at best in locking and will only unlock when actuating from the driver's side. The driver side rear door is also not closing in "auto" form either.