W116, Body and Interior Specific Aid

The vehicle is a 1980 300SD, 116 Chassis with nearing 300K miles. My problems began with a slight delay in the engine shutting off with the key, and has progressed to no door locks and I have to raise the hood and manually shut the engine off. I have also noticed the engine is running rough at idle, but smooths out at about 1000RPM. I intend to troubleshoot the vacuum system, but can't tell from the descriptions which of the guides I should purchase: the vacuum door lock one, the my engine doesn't shut off one, or the larger, apparently more comprehensive diesel survivor's guide.

Our 1979 300D runs great at speed. We just installed Kent's boost pump kit and it really does help starting and idling and did help a little on power too. I was hoping it would also solve our shifting problem as well but it did not. From a dead stop, the car will always start rolling in second gear (which as everyone knows makes it painfully slow) even if I mash the pedal down. It will do this even if I shift into neutral while stopped then shift to drive just before moving.
We've already done the following to this car: recent valve adjustment, timing chain replaced (has good timing now), recent diesel purge, new filters, fuel lines and fuel strainer, adjusted kickdown rod from throttle to transmission (which did improve the shifting above 20mph to earlier shifts for more power).