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Old 06-09-2005, 10:22 PM
younger than most trees
 
Join Date: Jun 2004
Location: Albuquerque
Posts: 88
w123 vacuum system check

I am thinking about buying a '95 300CD (170k miles) and would like to know if there is a relatively simple single point (or just a few) connection to test integrity of the vacuum system. Other systems have obvious funtionality - I hope. Anything else tricky to look for?
Jacob
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Old 06-10-2005, 07:47 PM
Johnhef's Avatar
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Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
I assume you meant "85" 300CD...

1) if the door locks work well for 5 or 6 turns with the engine off, theyre good.
2) if you turn on the economy button on the climate control and don't feel air blowing out the defroster vent, its probably good.
3) with the engine running and doors closed, try to fold the seats foward, if they dont move, the seat locks work good
4) if the car shuts off right away when you turn the key off, its good.

if you have a tester, test the systems in various conditions at the main spliter at the firewall.
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1980 500SE/AMG Euro
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1983 300TD
1983 500SEC/AMG Euro
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1986 190E 2.3-16
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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
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Old 06-11-2005, 04:46 PM
younger than most trees
 
Join Date: Jun 2004
Location: Albuquerque
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Yup, it's a beautiful '85 CD. Thanks, I'll look for those things.
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