THANX Charlie ! .

I'm still trying to figure out how I got so much condensate water in the passenger side footwell yet not a drop when I ran the garden hose in there via the blower motor opening...... .

FWIW , I'd replaced the blower's brushes a year or so ago with the Mercedes Source kit , it was easy but the commutator was worn unevenly and has been worrying me so I bought a new Uro brand blower and installed it ~ it works great but is *much* noisier than the original Mercedes blower ever was .

I can hear that electric motor whine in addition to the squirrel cage noise .

On the other hand , I now have more air volume and that's good .

I'm about the install a SANDEN 7 series AC compressor and a new condenser plus an expansion valve as the system is charged and has pressure but only blows luke warm air no matter what .

The current R4 compressor was apparently replaced not long ago , it's a DELPHI (AC Delco's new name) unit , # 52390419 that's been trouble free as long as I've owned this Coupe .

I'll save it and prolly install in in my European 300TD that I'm pretty sure still has the original 1984 compressor in it , leaks out the charge in a few months every time I re charge it .

I include the AC Delco part # so others can find one cheaply .....

I'll report back on the SANDEN up grade after Summer .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

I used the spray can evap cleaner fron Autozone 2 summers ago and as I recall, it did not work that great because not much crud came out (I followed the instructions). I think the method presented here by 1980sd is far superior. The only thing I would do different is I would use LA Awesome cleaner and dilute it 10 to 1 and spray the solution onto the evaporator with a small plastic nozzle using a windshield washer pump. With the amazing grime cleaning power of LA Awesome and the forceful jet from the washer pump, the tooth brush is not necessary IMO, the jet of LA Awesome will easily blast all the grime away and leave it squeaky clean. LA Awesome is $1 a quart from Dollar General, mixed 10 to 1 you have 10 quarts and I wouldn't even consider filtering and recycling thru the pump (chance of clog if not filtered well). Much cheaper than evap foam cleaner ( I think the kit was around $17). With a cheap USB camera, you can easily verify results before/after.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

that's pretty funny. good one

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2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900

Professional AC people... who deal with long neglected heater and AC radiators know the power of good cleaning bubbles.....
On a part this important......as easy as it is to BEND FINS....and how hard it would be to get them straightened...... AC places have a ' comb' with multiple number of teeth per inch to use for straightening.....but that requires way more space than we have here...so don't take any chances on bending fins....with too much fluid power nozzles.... or any kind of brushes... or vacuums....
Ample use of proper professional chemicals... with ample patience.... and loads of water afterwards..... is the key to a happy job ending...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html