1998 Mercedes-Benz S500 Q&A

1998 Mercedes-Benz S500 Question: door and trunk vacuum works only a few times after reconnection.

vacuum pump that located in the trunk works only a few times after I disconnected a connector and connected it again. All doors and trunk losses vacuum one after another. I though that vacuum pump creates the problem therefore I replaced it with a new one. But the problem is still occurs. Thank you. -
Answer 1
possible leak in vacuum system -
Comment 1
how to check it? -
Answer 2
have a smoke test done on vac system to determine if you have a leak to start with -
Comment 1
thank you! -