PLEASE, I need your help. My 190 E, 2.6L, 1988, was token to
the Blacksmith for fixing the Locks. This Guy does'nt know how
lost the vaccum signal pressure, then We can't lock the doors.
What are the critical points for checking the vaccum pressure?
We feel vacuum pressure going out from the engine, but not enough vaccum at the driver door?
How to increase the vaccum pressure?
Any possible damaged parts to change? How to test it?
I would appreciate a vaccum system diagram.