Thanks Hirnbeiss,

I'm thinking it's the solenoid too. For instance, when I lock the car now, everything locks except the driver's door. I can't push the lock plunger up or down on the driver's door, like I can on the others to unlock or lock the car. It seems restricted or seized. Inserting a key into the trunk or passenger side will yield the same results, but not the driver's door.

I'm pretty sure I have the new lock installed properly and it is seated into the white circular ring inside the door, but you'd think it would at least let me get into the driver's door from using the key?

I'm pretty sure the vacuum lines are good as the system is strong otherwise. I'll check the wiring next. Is the fact that the lock pin/plunger on the top of the door panel won't go up and down a tell tale sign the solenoid is broken?

-Mike

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1989 300CE - 269,000 km
1994 SL600 - 59,000 km