Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-29-2009, 04:06 PM
Wayfarer's Avatar
Registered User
 
Join Date: Feb 2006
Location: Boise, Idaho
Posts: 112
W123 240D year changes?

Hi all. I'm searching for a suitable replacement for my wife's now deceased '92 300D turbo. That was a great car, but we have both had a soft spot for W123's as both of us have happily owned them in the past. Since I intend to do most maintenance myself, we are starting to lean toward a 240D.

My question is what year/s should I be looking for and is regarded as the best? After searching posts here, it appears there may have been some changes from 1977-1983, some good and some bad. Some of the changes I think were: an improved head design somewhere around 81, addition of EGR and possibly other emissions components in 82, improved rustproofing and underbody coating maybe in 82, and switch from horsehair to synthetic fibers for the seat cushions at some point unknown. I don't know if this list is complete or accurate.

So concluding from what I've gathered, '81 looks to be the best year as it incorporates the new head but before the addition of emissions components. Does anybody know if this is an accurate assessment? Are there any other significant changes that might change my analysis? I know I might be able to make some changes myself, but I'd really like to keep the car as original as possible.

Thanks!
__________________
1972 280SE 4.5
1984 300SD, 250K
1991 300SE, 89K
1992 300D (330K miles when KIA'd by mother-in-law 8/10/09 - still sitting in my barn)
1994 E320, 109K
1995 E420, 60K
Proud Member of the Mercedes Benz Club of America - Idaho Chapter
Reply With Quote
  #2  
Old 08-29-2009, 04:14 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 32,257
I have had at least a dozen 240s both 115 and 123. I like the 82 and 83 best. More refined and better rust proofing. Stick.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #3  
Old 08-29-2009, 04:19 PM
Wayfarer's Avatar
Registered User
 
Join Date: Feb 2006
Location: Boise, Idaho
Posts: 112
Quote:
Originally Posted by t walgamuth View Post
I have had at least a dozen 240s both 115 and 123. I like the 82 and 83 best. More refined and better rust proofing. Stick.
Refined in what way? Can you be more specific, like were there any steering, suspension, or transmission changes?

So then better rustproofing started in 82. Do you know what more precisely what they did to improve it?
__________________
1972 280SE 4.5
1984 300SD, 250K
1991 300SE, 89K
1992 300D (330K miles when KIA'd by mother-in-law 8/10/09 - still sitting in my barn)
1994 E320, 109K
1995 E420, 60K
Proud Member of the Mercedes Benz Club of America - Idaho Chapter
Reply With Quote
  #4  
Old 08-29-2009, 05:06 PM
lietuviai's Avatar
Registered User
 
Join Date: Mar 2003
Location: SW WA
Posts: 5,741
I know that there were also changes in the manual transmission gear ratios on the later models improving their off the line acceleration.
__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
Reply With Quote
  #5  
Old 08-29-2009, 08:50 PM
Scott98's Avatar
Registered User
 
Join Date: Aug 2003
Location: Weston, FL
Posts: 1,254
There also was a change from the loop style glow plugs to the pencil type - easy to spot. As a general rule, the last few years of a model run are always the best. I have an '82 and it is the easiest car in the world to work on. I love it.

Scott
__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)
Reply With Quote
  #6  
Old 08-30-2009, 12:11 AM
Wayfarer's Avatar
Registered User
 
Join Date: Feb 2006
Location: Boise, Idaho
Posts: 112
Am I correct that emissions & EGR started in '82 on the 240D? And the new head giving 5hp or so came in '81. If so, '81 would appear to be the optimal year, as long as there were no other significant improvements after that. An '81 would be year 5 out of a 7 year model run, so most improvements should be incorporated I would think. I agree that you are always better off buying a car near the end of its production run rather than toward the beginning.
__________________
1972 280SE 4.5
1984 300SD, 250K
1991 300SE, 89K
1992 300D (330K miles when KIA'd by mother-in-law 8/10/09 - still sitting in my barn)
1994 E320, 109K
1995 E420, 60K
Proud Member of the Mercedes Benz Club of America - Idaho Chapter
Reply With Quote
  #7  
Old 08-30-2009, 12:20 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Don't overthink this thing too much!!
There are a couple of biggies, both around 1980 and later. Pencil style glow plugs and the R4 compressor on the lower left portion of engine as opposed to the giant York on the top right.
Remember, if 67hp is the question, 72hp ain't the answer.....
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #8  
Old 08-30-2009, 01:08 AM
tankowner's Avatar
You talkiní to me?
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 907
Quote:
Originally Posted by JimmyL View Post
Remember, if 67hp is the question, 72hp ain't the answer.....
LOL. Nice, I like that one.
__________________
'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
______________________________________

"Back off, man. Iím a scientistĒ ~ Peter Venkman
Reply With Quote
  #9  
Old 08-30-2009, 01:15 AM
Wayfarer's Avatar
Registered User
 
Join Date: Feb 2006
Location: Boise, Idaho
Posts: 112
Quote:
Originally Posted by JimmyL View Post
Don't overthink this thing too much!!

Remember, if 67hp is the question, 72hp ain't the answer.....
Awesome!

Well, back to overthinking, this thread says the better rustproofing started in '81:

240D's different body style??

'81 looks like it's going to be my year.
__________________
1972 280SE 4.5
1984 300SD, 250K
1991 300SE, 89K
1992 300D (330K miles when KIA'd by mother-in-law 8/10/09 - still sitting in my barn)
1994 E320, 109K
1995 E420, 60K
Proud Member of the Mercedes Benz Club of America - Idaho Chapter
Reply With Quote
  #10  
Old 08-30-2009, 01:54 AM
Cyberbach's Avatar
Registered User
 
Join Date: Aug 2009
Posts: 1
You might want to check into the differences in the tranny setup between 81 and 82. If I read correctly, the 1981 240D had a completely vacuum reliant transmission and can be a bear to set up correctly, where as the 82 was more refined? Mine is an 81 and it gave me fits until I finally got it set correctly.
Reply With Quote
  #11  
Old 08-30-2009, 06:17 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 32,257
Quote:
Originally Posted by Wayfarer View Post
Refined in what way? Can you be more specific, like were there any steering, suspension, or transmission changes?

So then better rustproofing started in 82. Do you know what more precisely what they did to improve it?
The only thing that comes to mind is the delayed shut off on the inside front light.

There were other running changes along the way like electric window switch changes and seat belt changes too.

I don't know what they did to improve rustproofing I just know they seem to hold up better. No mechanical changes I am aware of in steering or suspension. There were different gear ratios along in there but I am not aware they make a lot of difference.

As for the extra five horsepower? pffft!

MB simply made improvements along the way and the cars kept getting a little better each year.

Find a nice clean one with the ac mounted down low and have fun!

If you find a 79 and 83 both for the same price and both in exactly the same condition () go for the newer one.

Good luck looking. They are pretty old cars now so the nice ones are getting pretty rare.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #12  
Old 08-30-2009, 09:09 AM
Registered User
 
Join Date: Mar 2004
Posts: 375
I have a 77 240D all manual, I had this car for about 26 years and love it.

But.

If I had to do it again I would start at 81 and up. The single major improvement is the A/C compressor, on older 240Dís they installed York, it is a monster and it drains what little power that the engine can produce. York is a Chrysler product very durable but is designed for big V8 engines.

Vahe
Reply With Quote
  #13  
Old 08-30-2009, 10:07 AM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Please don't limit yourself to a certain year. Look for the one in the best condition you can find, and that you can afford.
my .02
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

Reply With Quote
  #14  
Old 08-30-2009, 01:30 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
OK, Since I overthink EVERYTHING I am IN....
I would only get a stick 240d. Look at the threads concerning fixing any of these old auto transmissions and you understand that.
I would avoid the York for reasons noted.
I would BE SURE MY CAR HAD THE TYPE ONE AIR CONDITIONING. Not the vertical wheel on the dash... for the same reasons you would avoid the auto transmissions.

If you run across a five cylinder (non turbo ) five speed manual forget the 240 completely ..but still look for the type one AC...
Reply With Quote
  #15  
Old 08-30-2009, 08:40 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Do some research on the HVAC unit, the older ones can be a nightmare.
__________________
83 SD

84 CD
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:13 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page