The heater is no longer working on my 1980 300sd again. AC seems OK. My mechanic said it is too expensive to rebuild this system but I was thinking that it might just need a servo (read this among postings found in a search of this site).

My thought is to go to the junk yard and try to find an aluminum servo and take it to the mechanic. Trouble is that I don't know what one looks like or where it is located on the car. Also would not know how to determine if the one I find (if any) is in good operating condition.

Does this sound like something that would be worthwhile.

A manual system would be an excellent alternative for me because the manual system on my 240d never fails but I would have no idea how to set this up or where to find a kit if such a thing is available. Is there a kit available to do this conversion?

Thanks

__________________
DCM

1977 240d
1980 300sd
1987 Chevrolet Suburban

it is under the hood by the passenger side hood hinge

__________________
1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins

if its like the 80 300d i have, then it will have about 8 vacuum lines and an electrical harness going to it too. but im not sure if our cars are the same.


i bypassed mine for the time being, because it was leaking and had a huge draw on the battery when ignition was off. im looking for one now myself.just cant afford buying a $600 replacement right now.

__________________
1980 300D

Good luck finding an alu body ACCII in a junk yard!!!

the Servos from W107, W123, and W116 are the same for all the models.

Transforming your system to manual is a major undertaking even if you have a complete donor car (in this case only a 280SE or a 450SEL from 1972-1976).

another alternative is the digital upgrade, but it is a 700bucks toy...

__________________
------------------------------------------
Aquilae non capunt muscas! (Eagles don't hunt flies!)


1979 300SD Black/Black MBtex239000mi
1983 300TD euro-NA. White/Olive Cloth-MBtex 201000mi. Fleet car of the USA embassy in Morocco
1983 240D Labrador Blue/Blue MBtex 161000mi

i see the aluminum models all the time, i will try and rescue the next one i see

__________________
1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins

Sounds like anything but a used Servo is not worthwhile. I will start browsing the junk yards next week.

Thanks

__________________
DCM

1977 240d
1980 300sd
1987 Chevrolet Suburban

I opened the hood this evening and am sure I found the Servo. It had a red part on the bottom with hoses running into it and the top part had a very large number wires running into it. Looks like it will be very easy to identify and remove in the junk yard.

Will the aluminum ones be painted black or will they be easy to tell from the black on that is in my car?

Thanks

__________________
DCM

1977 240d
1980 300sd
1987 Chevrolet Suburban

The aluminum one I purchased was not painted. Only the lower portion is aluminum on mine. It's the part that typically cracks on the plastic version.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I got one lying around that may very well work. not sure when I get to it, but you can have it for a junkyard price

DCM, you should be able to find it easy enough in a parts yard. the top portion look pretty much the same. the location of the aux water pump bracket might differ. i have seen the bottom either shiny unpainted aluminum and one that was painted black. just make sure it is not the black plastic bottom.


i just wanted to put it out that if anyone stumbles on this thread and has one to offer up, please dont be afraid to let us know, there are a couple of us on the forum looking for a used servo.

__________________
1980 300D