you're better off having wrenches handy to loosen the injector lines. I was a bit paranoid about the runaway issue, so here's what I did: I set several vise grips on the nuts leading into the injectors. The nuts were "almost" fully tightened, just enough to seal, but not fully tight to securely stay that way for long. The vise grips were attached, similarly pointing 1/2 way back. This way I could rotate several nuts CCW in just a second if I needed to. All you need is to loosen them a little, because the injector will not open without over 100 bar of pressure.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.