Im a first time Mercedes owner and my 1986 300SDL driver side door will not lock! The vacuum pump locks all the other doors from any other lock access point but not the drivers side. The lock will NOT manually push down and I really need it to! What could be the cause of this. Also, the vacuum doesnt seem to be activating from the drivers side door lock.
I just bought this car today and I got some other SMALL chassis issues. The center console seems be bulging out and the wood trim that surrounds the shifter just wont stay down! The clock doesnt work. The vinyl on the seatbelt towers are coming off (how do you remove them to re-upholster), and is it normal for the heat to take 1 minute to start warming up?

Any tips on this model Mercedes would help a lot...tips, tricks, all that. Also...is this model year the doomed diesel year?