I did have the injector lines in place, If you still have your adjustment knob in place you'll be fine I think. Without it you'll encounter resistance like I did. One of my lines ended up rubbing against the intake manifold...had to wedge some rubber between them to prevent them grinding.

No, I did not have my engine running... I DO remember reading somewhere that it's not safe to adjust the pump while running. I don't know why though, but better safe than sorry. (A few years back I did adjust a non-turbo 300D this way... nothing bad happened, maybe I was lucky?)

I've never seen or used an AB timing light. It was an ALL FEEL thing both times.

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project