So I am installing my radio and accessories today and I find the below pictured valve (?) behind the glove box. I start to wonder why it is spliced into the glove box light wire. I investigate further and looking up near the center dash vent that is supposed to be for the auto climate control I see the wires looked spliced. I feel for the connector on the climate control vent and nothing is there. This valve has a tube going up the pillar on the passenger side and there are two wires going up the pillar that look the same as the ones attached to the valve. I wonder if this is related to my other post with the strange hole in the headliner. So what it looks to me like is someone relocated the temp sensor to the roof. But why would anyone do this?

Attached Thumbnails

     

Which Mercedes Benz?

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83 SD

84 CD

It is in the roof in a 126, IIRC.

That rear view mirror stem looks like that of a W123. That's the correct placement of the vent in a W126, but not a W123.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

There appears to be a fan in that thing. Is that the interior air temperature sensor and aspirator fan?

That's what I was thinking too.

On a side note: Does every 123 have that crap around the edge of the rearview mirror? I had to scrape it off both of mine when I bought them.

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Chad
2013 Jeep Unlimited Rubicon
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL

Mine did, I thought that the PO had done a lousy job of regluing the mirror. Sounds like it's a Mercedes thing,

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Yeah, I thought that's what it is. The odd thing is it's clearly rigged by someone, as the power is spliced out of the glove box light using wire taps and I still have the vent in the dash but it's disconnected

I have no idea what car these pictures are from.

I am planning to relocate the sensor on my 123 from the dash to somewhere in the shade. In the Texas sunshine, it senses the change when conditions change from direct sun to shade from a building or cloud. The newer model had the sensor overhead so they may have been trying to upgrade to the new location. I'm planning to put mine below the wood trim on the front of the dash just left of the glove box if the piping will fit. I have a Coverlay cover with no hole to cover the original hole a lot of cracks. Warmer weather project.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/mercedes-benz-cars-sale/296386-fs-1-owner-83-mb-300d-turbo-rebuild-parts.html

Looking at it again, it appears to be from a W123. It's missing the signature sun blind over the rear view mirror that the 126s have.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Sorry guys, it's a w123 an 85 300 Turbo Diesel

My guess it's another factory oddity of 85 123s.

Sixto
87 300D

That is the Air sampler motor for the sensor in the hole in shown in the first picture, there is a tube that the sensor sets in(plastic holder with tube connected). The air tube runs to the sampler and then on to the heater box near the heater control. This is the automatic climate contriol. Didn't know they put them in the 123's but they are in Gen II 86-91 models.

Is the 123 a later model?

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.

There are 3 85 300Ds on eBay and all 3 have a temp sensor port in the dash.

Moving the temp sensor is a heck of a lot of work to be able to use the dash mat from an older 123

Sixto
87 300D

Both my 85's have them on the dash too.

__________________
Chad
2013 Jeep Unlimited Rubicon
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL