Marvin:

Sounds like a bad lock actuator on the driver's door -- if it doesn't properly unlock, it may be causing the latch to jamb. Could also be a leaking plastic or rubber fitting.

Quick guide to vacuum lines:

Brown and brown with blue stripe are engine shutoff.

Green is AC. check vavle on firewall.

Yellow, yellow with red stripe, and yellow with green strip are vacuum locks. Locks are switched by a valve in the driver's door. Check valve on firewall

White is for the transmission modulator control. There is a restrictor at the connection to main vaccuum line.

There are two vacuum reserviors -- one for the locks (big) and one for the AC (small).

There is a vaccum diagram posted in this discussion group for the vaccuum modulator system, I don't remember which one.

Hope this helps!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!