Strange. I replied to post #12 long ago, but now don't see the response. Anyway, I checked McMaster's site and still see PN 5269K311 at same price. I even posted the screenshot (not going to repeat).

In answer to other questions, all three 300D engines I have are turbo-diesel (917.952? I forget M-B PN's). I have no idea how the 1984 engine wound up with 3 non-turbo injectors (before I bought it). Not in there now.

I use both the analog gage and the electronic recording. Without a "peak capture" needle, it is hard to catch the exact "pop pressure", and if not damped, some of the needle bouncing could be from momentum rather than true pressure fluctuations. My gage has neither I recall. Last pass, I didn't use the Dataq recording because their software keeps hanging up, making usage very tedious, and I was rushed. I'll try to find a better A/D product or write my own custom software.