I just replaced my acc servo on my 1979 300sd with an unwired tools acc upgrade. What a difference. It brought the climate control system from 1960's technology to the 21 century.

It is very easy to install (3 hours and 4 beers). It is not cheap,but worth every penny,if you are planning on keeping you old Mercedes for an extend time.

I have no afflialtion with Unwired Tools, I just wanted to pass along my satisifaction with the product.

Augusta

I was able to score an aluminum body servo for the 1980.

Had I not found it, I would have gone to the unit you purchased.

It seems totally like the right thing to do.

If this ever fails, I will go to unwired tools.

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80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250

Like I have said before, I installed one last year in a 450SLC and was very impressed with it and the ease of installation. The owner loves it and it's still working great.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350