Ok, thanks. Thought there were two sensors - one for the outside temperature and another that reads air coming into the airbox. Since the gauge cluster reads true 100% of the time and the climate control module when in sensor mode reads only true when driving at speeds and way high at idle my thinking was that another sensor may have been loose and was reading engine bay temps.

Is is possible to check the coding from the climate control unit without a scan tool.
Have read all the codes and I was able to get into a mode that displays P1 and P2 that allows the user to change values.

Seems like my MB dealer has put someone really inexperienced on the job - know I have an extended bumper to bumper and seems like they just want to throw parts at the problem. Don't want to "soak" the extended warranty company just in case I have a major repair that they may think twice about.

Any help would be appreciated. My last two values which are within the P1 and P2 mode are 200 and 15 if that helps.