Monovalve question?? 94 E320

[acha3]

I have trouble with the a/c climate control ( it burns). I buy another one, but I and now I fear that if I put the climate control it will be burn. My car is a 94 E320. The aux water motor it is in the battery compartment beside the monovalve. When I take the climate control out (the old one) the a/c side vents keep blowing heat. I dissconet the aux motor, my question is it will be okay to put the new climate control. Other thing I check in the forum and someone said that the monovalve that my car have does not have the problems that the earlier monovalve have, it this true??. Thanks in advance