Whats the point of removing the ALDA? I heard it increases power once removed, is that true? Is it an easy diy job? Can someone guide me as to where it is and how to remove it on a 1993 300D 2.5 turbo?

Yes it increases power and throttle response in low boost situations at the expense of more smoke if you floor it. If you have even a little bit of dexterity in your right foot you won't make any additional smoke. Its especially handy with a manual transmission. I think it was installed for people who treat the accelerator like an ON/OFF switch. Your 602 should be very similar to this.
OM603 ALDA removal instructions

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CENSORED due to not family friendly words

Arm yourself with a 24mm wrench and a 27mm wrench....it can be very difficult to break free.

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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 on Tan, 142k mi, wastegate conversion, ALDA delete

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

Shouldn't be a problem, thanks for the advice.

Thanks for the link I'll check it out when I get home.

Or, just arm yourself with a screw driver and a hammer. The best car i ever had, a 1993 black on black country club owner 1993 300D , had trouble running and I fixed it by chiseling off the alda with a screw driver and a hammer in the driveway in about 10 minutes, think opening a can with a swiss army knife on a campout. The 1993 has that dashpot model that seems to clog easier. The benefit is its easier to disable.

That car i got 4 years ago and the owner thought it needed an engine. It had 250,000 or so. I drove it a year and a half or so and sold it and is still going, no issues, with the alda still disabled and a definite hand hazzard if you ever put your hand under the intake

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

Does it really run all that better?

it runs much better with the alda off, than with the alda hose plugged... if the hose is clean, there is little difference aside from the smoking ability...

keep in mind, the alda hose, is coupled to the transmission vacuum tranducer for firmer shifting... so, if the alda is disabled, be SURE you reroute the alda pressure correctly to the tranducer, or remove all of the tranducer mess, and recondition your transmission modulator...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

A '93 2.5 shouldn't have a transducer.

Sixto
87 300D

93 don't have the transducer mess right? If I recall i just plugged the vacuum hose off the alda with an official mercedes benz golf tee. Btw, Mercedes golf tees are the only bargain I have ever found at the dealer. I got a bag of 100 or so for 3.59 at the dealer. It was cheaper than the public golf course. If you want to do it right, you have to use a mercedes-benz golf tee.

Its funny to think of the next mechanic looking at it and thinking "Wow, the dealer put a golf tee in here "

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

The car wouldn't move out of my driveway before i chopped off the alda. Been running like a scalded dog with 35 mpg avg ever since and still going for the last 4 years. Literally, the car wouldn't drive up a small slope out onto the road. I tried the cleaning the alda T fitting first.

Ever since then, if there are any symptoms of no moving when you put your foot on the pedal, the first thing i do is check the alda vacuum lines and then remove the alda. Older cars you have to wrench them off. But the 93, screw driver and hammer is easier and you never have to worry about that problem again.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

I have driven with mine on and off and I noticed no difference other than more smoke. If your ALDA is functioning properly and the supporting parts are in good shape, I see no reason to remove it.

A turn or so on the screw doesnt hurt.

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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

For those of you who just chisel and hammer it off should i be afraid of anything? Where should i strike it? wouldn't i have to seal whats under it?

You'd be much better advised to use the two-wrench method.

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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 on Tan, 142k mi, wastegate conversion, ALDA delete

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