can you help me with my error codes if i get them to you? I have no red light on but my ac is not blowing.Do this procedure. First put the key in the second positiion - do not start the car. Jack the driver temp to high and the passenger to low. Press and hold both the EC and REST buttons at the same time. This will enter the climate diag mode. Press the right auto buttom when the screen blanks out on the climate control. It will run a diag. Report back the error codes. you get each but pressing the right auto button.
If the first code is FF then there are no error codes.
We have a 2000 CLK 320 with the EC light illuminated on the Climate Control Unit, I have run the diagnostics and found that I have two codes that were not in the error code list: 42 and 43. The values are as follows 42 = 232 and 43 = 14. This past summer I filled the system with R134 refrigerant as the system has a front seal leak in the compressor and I have not replaced it yet. Within hours of recharging the system, it no longer blew cold air and the EC light came on. I have yet to purchase the service manual simply because MB wants too much for it.We discussed a/c diagnostic error codes for W208 & W209 a few months ago here.