Update:

I went out to the garage and tried it again. It looks like the HF kit does have an adapter for the MB fuel injectors. I screwed in the adapter, made sure everything was tight but the adapter leaked and I couldn't get a reading. So, I tried using the glow plug holes. I was able to get readings on cylinders 1 and 2. I had to use a different adapter for 3 and 4 because of the IP and that adapter leaked and I couldn't get a reading.

I guess quality control at HF isn't that good and I've got a bad tester. I'm sure other people have them and have had better luck than me but I wouldn't recommend it to anyone.

Anyway, the readings I got on cylinders 1 and 2 were 270 psi and 320 psi, respectively. I'm not happy about the first reading but I guess the engine still has some life left it it. I'm thinking cylinders 3 and 4 will read like cylinder 2 because they had the same reading as number 2 yesterday when I was using that other fuel injection adapter.

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)