1990 Mercedes-Benz S-Class - Page 6 - Answered Questions & Fixed issues
The front passenger side's door of my s420
look at the hinge area of the door and look for a small stepped bar that holds the door in positions when opening. It moves over a small roller. They have a habit of rusting up and instead of rolling will jump over the notches. Tyr some oil or grease and see it that fixes the problem. Some oil on the hinges may help as well.
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