Well, is it? It looks nothing like the ALDAs from other OM60X engines I've seen. In fact, I bought a 1992 300D 2.5 Turbo today for parts and the ALDA on it looks like all the others I've seen but the one on my 1993 300D 2.5 Turbo (pictured) looks like something off of an old 240D injector pump. I'm currently enjoying no boost on the '93 and was getting ready to order PN 433489-12 from atpturbo.com but wanted to get some opinions on this ALDA.

Also pictured is the 1992 300D 2.5 Turbo that followed me home today.

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That's the wrong ALDA. Either (a) remove and plug the pressure line or (b) put the proper ALDA on there. I have a couple of extras if you need one.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

I'll just plug the line for now.

My 93 has the same alda, the 92 has the other style.

I removed mine and run with out. my foot is my alda.

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2011 e320 cdi (132,000) current
2005 Jeep CRD diesel--2.8L (138,000 miles) wrecked, insurance took
1993 Mercedes benz 300D 2.5 Turbo Frybrid powered. (336,000 miles) wrecked and sold as parts car
1990 Mercedes benz 300D 2.5 Turbo (170,000 miles) wrecked and sold as parts car

Check out my Frybrid Vegtable Oil Conversion at http://1990300dfrybridconversion.shutterfly.com/

when you remove it, do you do just that? Leaving the top exposed?