1997 S 500 Coupe Climate Control
 

I have tried to do the diagnostic tests as suggested, but I am unable to get a readout. I have replaced the blower motor regulator, the cabin air filter and the AC relay. Now, I am getting the issue of the control unit doing whatever it wants. Any ideas?

What exactly does the system do OR not do corectly?

Oddly enough...the problems with the climate control....which seemed like a blown blower regulator...which I had already replaced...disappeared on their own.

The day before the CC developed a mind of its own, I had traveled through serious standing water and a sustained torrential downpour. I believe that water reached some part it was not supposed to reach and just dried out on its own. However, I also did remove and clean the cabin temperature aspirator- that may have helped the "fix."

Thanks.