I have the following genuine factory Mercedes publication for sale:
"Service Manual: Heating, Air Conditioning Automatic Climate Control Model 123"
This has pretty much everything you wanted or needed to know about your 123 HVAC system. Electrical schematics, etc., etc. Why pay someone to diagnose and fix the problem when, with this, you stand a good chance of doing it yourself. One use and it paid for itself. This is EXACTLY the same item the service technicians use.
It's a little over an inch thick of unnumbered pages. Very clean, but there are a few loose pages where the glue has become unstuck. From its appearance it looks hardly used.
This is a genuine factory manual, not a pdf or disc which is pretty much impossible to use when under the dash if you know what I mean.
These were generally not available to the public but designed for use by service technicians. I bought out the inventory of a retired service tech, all 400lbs of paper manuals to get the few 124 items I wanted, clearly a case of more money than brains....
I'd rather sell them to someone who actually needs them for either their use or for their collection rather than donate them to the local library or put them on eBay. So if you need something from the 1980-2000 era or so I just might have it. Lots of rare and unusual stuff like training courses, internal documents, etc.
As 123's are becoming collectible the paperwork is also becoming more and more desirable. In a few years these may be close to impossible to find.
Any questions, please ask.
Anyway, I feel $75.00 shipped anywhere in the lower 48 is a fair price for this item.
124.092/M119 Non Malachite Red/Mushroom (for sale)