klaatu77 & MB-Man
There are different types of a/c unit fitted in W208/W209 CLKs. One has a display panel, and you can do a diagnostic test, which might give you a clue. See this thread here:
Also, there is a 'reset' command that puts all the flaps back into the right position at start up.
I know the reset instruction is in the archives here (as I posted it recently) but right now I am away from my own PC until Thursday and I have no access to my records. Also the location of those sensors is in the WIS on my own PC. I will get back to this thread later if still required...
Thanks so much ...yes, i found the notes in the archive and below are my readings. Readings were taken after 5mins of starting the car at parked for the whole day (was not able to use the car as the aircon is not blowing cold air)
01 The in-car temperature sensor. -> 33
02 The bumper temperature sensor. -> 28
03 The temperature of the left side heater core. -> 33
04 The temperature of the right side heater core. -> 35
05 The temperature at the evaporator sensor. -57
06 The engine coolant temperature. â€“ 72
07 The barometric pressure of the Freon. â€“ 7
08 The Freon temperature. â€“ 29
09 Blank. ->1
10 The voltage at the heater blower control (normal is 08-6.0, which is .8 to 6 volts). -> 4
11 Emissions sensor voltage (to detect atmospheric gases and recirculate interior air).
12 Sun sensor voltage (to shift airflow in car).
20 The current at the auxiliary fan (the electric fan on radiator, in milliamps or mA). -> 0
21 Engine speed (x 100 RPM). -> 7
22 Vehicle speed (km/h or mph depending on installation). -> 0
23 The percentage of battery voltage at terminal 58d (a percentage of total voltage, 99.0 = 99%). -> 0
24 Battery voltage (e.g. 12.8 = 12.8V). -> 14.2
40 The climate control software version. - V8 -> 5
41 The climate control hardware version. - V5 -> 3
Again do take note that did use the car and readings was taken after 5-8 mins of running the engine at idle.
Hope someone can interpret the readings.. not sure if item#5 and #7 are ok.