Dear Listers, I seem to have a lazy door lock on one of the rear doors of my 88 535i. The left rear door lock doesn't want to lock the first time you turn the key in the driver's door. I usually have to cycle all the locks 4 or 5 times before the lazy one finally locks. Unlocking isn't a problem. Is this a sign of a failing solenoid? Guy Cheesman 88 535i w/91K