Yes and the manual probably came with the original motor.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

well the reman motor manual says that a .912 was dropped in at 171,000 miles and the records for the upkeep of that motor stops at 234,000 miles.

So I think that after 234K another motor was dropped in and this one ended up being a turbo. No complaints here other than the difference in rear end ratios, 70mph sounds too fast to run the motor for very long, but it does encourage me to ride at 60mph.

if I was to do a rear end swap for a lower rear gear (2.8 something) what would I have to do to keep the odometer and speedo working right? get a new inst. cluster? or could it be as simple as changing the transmission gear that sends the speed to the inst. cluster?

Also aren't all '81 300D's NA?

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

If Erlend wants to swap rear ends to the turbo version, that would be ideal. But if not, he's no worse off than before, with regard to highway RPMs.

In my case I pulled the 5-speed from my 300D (Euro) parts car, mated that to the turbo engine, and left the rear end as-is.

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1995 E300 200k
1981 300GD unknown km

No. It's a general rule that wagons were turbo'd in '81 and the sedans and coupes in '82, but there are exceptions.

NAs are great in their own reicht, would be seemingly more productive to find another for the stable instead$.02

That turbo motor with the 3.46 rear diff and a 5 speed sounds like it will scoot around town. What kind of RPM's do you run at highway speeds?

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

I haven't added a tach yet. My car is basically just a 240D with a 5-cylinder engine. It has the big clock on the right side of the instrument panel. The turbo cars got the tach/clock combo instrument.

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1995 E300 200k
1981 300GD unknown km

yeah my 300D has the big clock off on the right too. other than getting a tachometer to put into the dash what else would be needed to install a working tachometer on a turbo motor?

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

tach amp.

Probably not an easy task.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

It is an easy task if you have a basic understanding of wiring diagrams and some wire crimpers. Mercedes designed the tach system very well in that its not tied into other systems until mid 84.

driving both a .951, and a .912 I gotta strongly disagree that their's not much difference off the line.
the .912 does have a strong kick from 0- 8 or so, but it really does not have enough power to rapidly accelerate. and to get the strong kick you HAVE to floor it to kick down into 1st off the line. then from 10-25 or so is ok on level ground, but gruleing on any kind of hill.
then the acceleration from 25 - 45ish is not bad, again unless you are on a hill and then it takes time.
the .951 on the other hand is brisk off the line and goes from 0-20 in first gear quite well, and from 10 or so on, the turbo really pulls the car along! hills are NO problem for the turbo! and the taller gearing makes the transmission gears last longer between shifts giving you much smoother acceleration.
I say if you do the swap, indeed swap everything. from the entire drivetrain.
from the alternator to the rear diff.
swap the instruments as well to get a good match.
and 85 motor/tranny/diff is the best, but i'm not sure of the problems with the newer electronics.
JM.02

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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!

I agree. Folks, he would not be thinking of this swap unless there are issures with the na engine,,,, right?

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I guess "off the line" is kind of vague and could mean different things to different people. I took it to mean off-idle, as in, when I let the clutch out and start to roll, do I feel any difference...not really. In other words, I was thinking of the immediate take off, before the turbo starts to spool. But yeah, once it does, then I do this -

I've never driven an automatic car so I can't make comparisons there. Bottom line, this is no sports car in any case. Yet it is an enthusiast's car, at least in my mind.

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1995 E300 200k
1981 300GD unknown km