I don't normally work on M-B but this is a friend and needs help. The two rear doors will not lock when the key is used to lock the doors. They will unlock but are slow in doing it. They are vacuum operated, and you can hear the motor run that makes the va...

FIX posted 4/3/1999

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle