W140 AC Question
 

I drive a 93 300SE. The dual Climate Controls have worked fine until now. When i turn the air conditioning to dual auto mode, and i turn the rotary dial in the center from "AUTO" to "MAX", i lose the blower motor. Is there a seperate relay for the Max and Auto functions? Is this a simple fix? Or is this gonna cost me $6000 and a new Evap. core?

Electronic blower regulator sounds bad. Apparently not uncommon as MB has issued an improved part. The new # is 140 821 83 51 , I believe (double check). The blower goes to highest when temp wheel turned to "MAX" and your highest circuit would seem to be out.

Edit:.... looks like joe p already addressed this issue in another thread... look there.

Alright then, one more question
 

Is this a cheap part, where is found at on the car, and will the labor price be incredible?

Check the previous thread http://www.peachparts.com/shopforum/showthread.php?threadid=44727

OH, I see it now.....
 

Thank You!