Driving in 1 degree weather my heater quit.Finally fuel line froze then 6 days later I got the car started.I noticed a smell like burning carpet.I've really had a time getting the car running when the hood cable snapped.Only solution was to punch out the grille.
Those who have had this smell please tell me where to look first.
I'm thinking heater control unit.Also aux water pump frozen.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

All other electricals work.Checked fuse .

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Sorry to hear of the smells. My guess is same as your the Climate Control printed circuit board as u already mentioned. One fellow had car burn up when one went bad. In it somewhere behing push buttons. Gooo luck.

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1982 300SD

Yep I'll service it hopefully with new solder or pick a used one.But also replace aux pump,as I hear they burn up the clima unit.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Few years back I put a 1A fuse in the power to pump wire. I was told to do this on this forum to eliminate the pump taking down the PCB.

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1982 300SD

Yes I heard about it when that guy lost his pride and joy. That was sad

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

just unplug the aux water pump if you want to test your new 2 u climate control. The aux pump isn't THAT important....depending on how much you idle. When you are driving, the coolant is pumped through the heater core very efficiently. My aux pump hasn't worked, ever. pretty sure it fried the ccu originally. I unplugged the pump and resoldered and my climate control has been fine ever since.

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg

Here is a thread about burned up/fried printed circuit CCU boards.

Good read for new members.

http://www.peachparts.com/shopforum/showthread.php?t=157591

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Unplug the monovalve connector, that should provide heat all the time.
With a dead ccu, heat could come out of any vent.

I ned a lot of info on component location and vacuum diagrams for my 91 350SDL W 126. It was incorrectly set up so when the defrost button is punched, max hot air goes to defrost. I have so far been unable to find the info I need to fix this.

I need the vacuum diagram and info on climate control. Does anyone have these files? I have so far not found them among the .pdf files benhogan provided, which were pretty complete.

Still also looking for a Xerox of the 350SDL owner's manual, may talk to a dealer and get a complete VMI when I have him make me a key copy this week.

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

My neighbor had a small stinky fire that I thought my car was burning.But I will still put a 1 amp fuse to aux pump.I check heater main fuse(good).So it maybe that blower has up and died.
I will have to wait till thrusday to fix,then we will have balmy 50 degrees.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

I took out battery and unpluged aux water pump heat works no smoke.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Isn't that set up correctly? At least that is what happens on the 123's and 116's.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

From the climate control manual...

Function selection "a" (defrosting)

With the ignition switched on, the blower will start immediately and operates in the 6th blower stage only.

Independent of the temperature dial adjustment, max. heated air will be routed to windshield.

The recirculating pump is always running along and the refrigerant compressor is switched on. If, with the ignition switch on, function selection "a" or "b" is pushed, followed by switching to "c" or "d", the system remains in operation also below 33 degrees C coolant temperature.

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mjk

'84 300SD 119KMi (Liesl der Diesel)
'84 300D 326KMi when the oil left (former parts car)
'82 300SD 253KMi (new parts car)