Hey guys,

Just a long shot here, but does anyone know the location of the blower motor regulator on a 123 1983 300D?

Ron

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the resistors are in the engine compartment

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

passenger side fender, in a metal housing that has holes in it.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D

I found the resistor and removed the blower motor....are those the only parts the impact operation? I was driving and the blower stopped working.....played with the CCU and ti started back..only to run for a few minutes and stop.

I did notice that the blower was not blowing on high when it restarted ...also the fuse does not have power? Will a bad resistor cause this or the blower regulator?

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That's the resistor, not the regulator. The regulator is in the vicinity of the glove box.

http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1983@@1983&makeid=63@@MERCEDES+BENZ@@X&modelid=6191%3AMBC%7C1504%3AED%7C10000135@@300D&catid=242213@@Climate+Control&subcatid=242297@@Blower+Regulator&applicationid=W0133-1715333&mode=PA

Where around the glove box...I even pulled out the glove box liner, lower kick panel, removed the blower motor, and still don't see it. Am I missing something or just that stupid?

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tango has got the right idea but its attached the ccu unit not the glovebox

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

okay, Is it behind the CCU? I had it out and it wasn't part of the CCU? Thanks for everyone's help thus far, but I have looked and must be over looking it.

I had seen the picture of the part too.

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If the blower regulator is attached to the CCU I will eat my torque wrench!!!

With the glove box liner removed, both the blower regulator and temp regulator should be easy to see.

The MB Electrical Manual describes the location as "behind the glove box." That's where it is on my '82 300D.

Sounds like your pushbutton unit is having some issues.

Before you open that thing up, check your fuses first - inspect them with a fine toothed comb. Wiggle them around or turn them. They can look good, but still be bad.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D

1. I dd check the fuse an actually changed it. Replaced with new.
2. Switched out the CCU with my spare and it still did not work.
3. I checked at the dealer and was told that there isn't a strip fuse either.

Had a guy jump the fuse with another and the wires started heating up.

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There is only 1 screw. The back side is just a metal tab which slides into the metal bracket, as I recall. Per the schematic, all that is inside that "blower auto-speed" box is an array of relays. I don't think the box itself decides upon blower speed, but has an array of command lines (~6) which come from another box, like the silver "TemperatureRegular" box next to it, though could be and/or the pushbutton box. The schematic should tell you.

While "in there", you might consider doing as I did and power that box via a new 12 awg wire direct from BAT+, with an inline fuse. You can easily push the wire thru the grommet below the battery tray (can work blind). The reason was that the high blower current may otherwise melt the #8 fuseholder if there is any resistance from corrosion. You see that in many of these cars in the junkyard. My 1985 300D had that problem, which appeared due to it having a special crimped part below the #8 fuseholder. I measured high resistance across that piece (google my post w/ photos). Not true on my 1984, though I rewired it similar just in case. That is also a much shorter path from the battery. I don't recall wiring a relay in there, since that power wire is always hot (recall). If switched, I would have.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans