This is what I got from my Chinese version repair manual.
After August 1995 MB changed diag program and the AC system.


1. In-car termperature sensor (with aspirator blower)
2. Outside temperature sensor
3. Heater core temperature sensor
4. Evaporator temperature sensor
5. Engine coolant temp. sensor
6. Refrigerant pressure in bar, e.g. 12*8 = 12.8 bar
7. Blower control voltage , e.g. 16*5 = 1.65 volts
8. N/A for 1995 model, Refrigerant temp. sensor for 1996
9. N/A
10. Blower control voltage (seems the same as 7, not sure)
20. Aux fan control current, 7=7mA
21. Engine Speed (RPM), e.g. 6*0 = 600 rpm
22. Vehicle speed (Kilometers Per Hour)
23. PBU illumination adjustable voltage, 88=88% input voltage)
40. Softare status
41. Hardware status
42. Version code 1 (ex.03)
43 Version code 2 (ex. bEn=gas engine)
50,51,52 not used
53. Compress status (On-Off)

JCE, I copy some of your typing. Hope don't mind!

Thanks
Charles