R is ' reserve' ...
most of them jump.. but I think it can be fixed or minimized...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

80 is a good operating temperature.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

welcome to 240d ownership welcome to the club. Get used to it being a giant slug. Deffinitly disconnect the egr and prop the throttle plate open. If your shifts arent to your liking adjust the rod running over to the vacuum switch you showed (making it longer or shorter adjusts the way the trans behaves). But if you have a vacuum leak (which you do or your locks and stuff would work) you have to fix the vacuum leak first or you are just adjusting past a problem and it will be a problem again after its fixed (so just cut and cap that vacuum like going into the car and save yourself the headache). Depending on what you want these cars can be great (but if your like me and speed matters ... good luck). If you want to fix the jumping gas gauge you have to pull the sender out of the tank and clean it, plenty of write ups and it should be the same for 617s or 616s. The piece you put a X on is the oil seperator, if you remove that it will never stop burning oil (trust me, still trying to work around not having it).

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

thanks josha37. I am mostly doing research, I will have to do most of these a little at a time, but I think I will get most of this stuff, done. maybe not the locks...

what MPG should I REALLY expect? I have heard anywhere from 25 to 50.

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1982 240D 265kmi automatic
2005 4X4 Cummins 165kmi Manual
2006 Kia Spectra 130kmi auto
1969 Dodge Dart, 273cid V8, sold

I get 24 with my manual..
got 27 with my turbo wagon..at more than 70 mph...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

good, never fifty, something in the low 30's high 20's depending on driving style and daily route

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

With the AUTO trans ?

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

yea... be nice to it!

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

Great car,I also have a 82. Even with the dreaded auto trans I always get where I'm going. Never have got the trans to shift perfect, shift from 3rd-4th by hand. Have had it almost 3 years went on a 800 mile trip with the family a week ago, even got a speeding ticket last sunday. Mine gets 24-26 city, 28-30 highway. Study the forums and take your time to learn the secrets.

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1982 240d "butternut"
1991 F350 4x4 7.3 5spd

The item you point to and have no idea, is the oil separator.

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83 SD

84 CD