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  #1  
Old 09-17-2013, 11:05 AM
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Join Date: Jul 2004
Location: Barrington, RI
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What vacuum line controls headrests on 92 300D?

Got 92 300D back from indie after gas-in-tank fiasco. Somehow the vacuum system got disturbed, but I don't notice any disconnected lines. The symptoms are a mild transmission bump under certain circumstances and the rear headrests won't go down.

Does anyone know which vacuum line goes to the rear headrests? I figure that if I can identify it I should be able to figure it out.

Thanks.
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06 E320 CDI "Benson", Platinum Blue, 169k mi, DD
91 300D "Otis", Smoke Silver, 123k mi, other DD
98 E300 "Murray", Silver, 120k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 227k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #2  
Old 09-17-2013, 11:47 AM
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Join Date: Nov 2010
Location: TX
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if you look behind the brake booster you will see a few vacuum lines, the white one is for the headrests and leads to the vacuum valve under the rear seat that directs vacuum to the pods that pull the headrest locks which makes them fall.
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  #3  
Old 09-17-2013, 12:33 PM
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Join Date: Jul 2004
Location: Barrington, RI
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D'oh! After inspecting and replacing hoses on the DRIVER side, I noticed a disconnected hose over on the PASSENGER side. Further proof that passenger side vacuum is evil and must be eliminated!
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06 E320 CDI "Benson", Platinum Blue, 169k mi, DD
91 300D "Otis", Smoke Silver, 123k mi, other DD
98 E300 "Murray", Silver, 120k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 227k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #4  
Old 09-17-2013, 02:22 PM
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Join Date: Oct 2011
Location: Columbia, SC
Posts: 2,987
That is one hose I don't have on my 300TD, no headrest dropper on a wagon...

I did the evil right side hose delete on mine.
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2014 ML350 Bluetec (wife's DD)
2008 ML320 CDI (Kids college DD)
1998 E300DT (my DD)
1987 300TD (eternal project, I'm in too deep to quit now)
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gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
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