Okay here's how I'm gonna do this: I have an '85 300TD in the woods, I know it runs because I drove it there (before I pulled the wheels, brakes, rotors, and all sorts of other goodies off it... best $600 investment I ever made, and I haven't even gotten into the engine yet ). I'm gonna pull the pump on that car this weekend, and order up one of those IP locking screws, an IP gasket, and fabricate some sort of a bar/clamp assembly to facilitate timing the IP using the millivolt method. Anything else required for an IP replacement? Then I'm gonna yank the suspect IP and put the known good IP in, and see if it runs... maybe even stick the suspect one on the parts car to block up the hole if I'm feeling especially kind towards the mercedes species. If problem persists then I take a sledge hammer and a cutting torch to the car... just kidding... or am I?