yes you can remove the alda on an 85. Large nut under it, turn it while holding the body to remove. think the nut is around an inch or so.

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1977 240D turbo

No, sorry, I meant remove it completely from the car, and alter the vac lines.

the large nut under it does remove it from the car. plug lines. In a perfect world you fix alda and any problems related to it. Must say just removing it works too. At least this will give you an idea of how it performs with out it. Then you can decide what to do next. I do think you should check fuel pressure if you have not already.

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1977 240D turbo

I filmed my 300CD after doing some IP tweaks. I still can't get much smoke if any...

• 14psi MAX w/ wastegate fully tightened
• ~1100F MAX temps on a LONG pull
• ALDA Removed
• Rack Limiter Removed
• Horizontal Throttle Stop turned in 1/2 turn

Mercedes 300CD Exhaust - YouTube

I read on another site, about removing banjo bolt and cleaning it with carb cleaner if its gunked up

my 1987 300 sdl, I cannot find the alda boost system. any help or thought sure would be appreciated

Intake plenum, small air hose about above the Cruise Control actuator, hose runs out to a valve (switchover valve) bottom fitting, back out of the middle fitting and over to the ALDA. No banjo bolt on this engine.

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Gone to the dark side

- Jeff