Alright, you guys really have me thinking now. I was all ready to replace my shut off valve this weekend!!

However, the lock on my passenger side front door does not unlock or lock the rest of the car anymore. And if memory serves, these two issues developed around the same time.

Is there a way of determining wheather or not it is indeed the shut off valve? I know that there is vacume at the line- if I unplug the fitting there is a hiss.

Do I trouble shoot the lock first? Thoughts are appreciated.

1992 300D 2.5 173,000 miles