So, when I found a green wire coiled up under the passenger side of the dash in my car that was plugged in to a vacuum line for no apparent reason, I figured it was an idiot PO's work. I may be wrong, as it turns out.

At the salvage yard the other day, I found another '77 300D exactly like mine in every way except for having a sunroof. The dash had been pulled, and this is what I saw.



The red arrows point to the wire and the vacuum line it is stuck in to. What the heck is that there for? One end is just cut off and coiled up. The other end is plugged in to a vacuum line behind the climate control panel. Why? Both my car and the salvage yard car have this same ridiculous wire! My brain is going to explode!

Seriously, folks... Anyone know why this exists?

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- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread

I see why your brain is exploding. Mine is quite perplexed too???? Where does the vacuum line go to?

__________________
-disav

99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete
98 E300 TURBODIESEL Alexandrite Green on black leather 289K
95 E300 DIESEL Green Queen 267K SOLD
84 300D 216k SOLD
87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD
76 300D 214K SOLD

Not positive, but I believe it hits a tee fitting that looks as though it's connected to one of the tiny vacuum pods directly behind the climate control. I don't recall what those do, as I haven't really dug in to the interior vacuum system, yet.

__________________
- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread

It is one of the cabin vents. I too asked the same question. Apparently the coil of wire leaks air. After 20years not nearly as much as the joint where it connects. I removed this on mine. The problem is that in doing so I ended up popping one of the bigger vac pods shortly there after. Dont mess with it. It is a "feature" of the type 2 climate control.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

May not be vaccume line at all. might be a light pipe for something.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.

To my knowledge, a '77 has type 1 ACC. Do you mean to tell me that Mercedes-Benz, in all their engineering glory, used a freakin' coil of wire to allow a slight vacuum leak?

My brain still hurts.

__________________
- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread

I saw this on my car and thought it was quite obvious what it was for. It is a catheter for use on long road trips. Mine works really well.

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85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale**
84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds
00 Toyota Sienna 208K (Sold)
15 Subaru Outback 43K
11 Subaru Outback 67K
98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now.
30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60

Same function as the PRT in airplanes?


AKA, the Pilot Releif Tube.....

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1983 Mercedes 300D
Atlanta, GA

It is a "leak point"... as designed by CHRYSLER that MB bought the system off of. I'm sure Chrysler laughed all the way to the bank on that one (its so bad we won't use it, but we convinced the Germans to buy it!! )

http://www.duricy.com/~imperialist/AutoTemp/autotemp.html
http://www.imperialclub.com/Repair/Lit/Master/244/index.htm

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

There's just some things those of us living on the ground don't need/want to know.....

So is that what the occasional odd feeling of drizzle is on a nice sunny day?

__________________
Chris
64 190D R.I.P.
80 240D W/617 engine -for sale
82 240D -for sale

Ok, that answers my question as well....

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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FACEBOOK: PANZER450

Yes, that is the couse for the drizzle on sunny days.... lol......

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1983 Mercedes 300D
Atlanta, GA

My old '77 parts car had the exact same coiled green wire. I assumed it was previous owner's hack job. Quite surprising to find out otherwise......

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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

I'm aware that Chrysler designed the POS ACC (Automatic Climate Catastrophe) system. What I still don't understand is why Mercedes used it. It's a mostly ingenious system that for the most part simply suffers from the utilization of poor materials. This wire, on the other hand, is just shear stupidity. A chunk of wire for a vacuum bleed? Holy crap. If I ever find the guy that made the decision to use this ridiculous green wire instead of a proper vacuum bleed valve, I won't care how old he is. I'm kickin' him right in the junk. Maybe twice for good measure.

__________________
- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread

LOL! I am not condoning it but please do get a video of it if you do.

__________________
-disav

99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete
98 E300 TURBODIESEL Alexandrite Green on black leather 289K
95 E300 DIESEL Green Queen 267K SOLD
84 300D 216k SOLD
87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD
76 300D 214K SOLD