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Mercedes W123 Vacuum Lock System Diagnosis Technique

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Mercedes W123 Vacuum Lock System Diagnosis Technique: crwdns2935265:00crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

  • Reach up inside the shell of the door and gently pull the switch down towards the opening in the door. Do not force the vacuum lines to bend excessively.

  • Inspect the switch, especially the metal end. If it looks heavily corroded/rusted or if the metal mechanism on the switch is very loose the switch may be a source of leaks. Consider replacing it. The switch on this car was leaking and was already replaced in this picture.

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