Originally Posted by dodahman

I was having the shut off problem myself on my '85 300D as well as the door locks. Using a Mighty Vac I was to rule out the door, trunk actuators. Line and rubber connectors all holding vacuum. Except one, the drivers door master switch. I plugged the yellow line with a golf tee and the engine shuts off! I replaced the master switch and...the problem persist. Thinking I had a defective part, I replaced it with another. The door locks still do not work! Am I missing something? I have done a lot of research on the previous posts to no avail.