Yes ....
I have the same problem.....
In the summer on a hot day the air will not work if the car gets hot outside.
However when its parked inside and car is cool the air comes right on. When the car is hot parked in the sun I have to drive down the road with the windows down for several miles Then all at once to air comes on.
Now it is winter ......and the blower stopped working again ......so now I have no heat....As I drive it may come on but then turn off .........
THE PLACE IS HAUNTED!!
I have read many posts ......The only code i get at this point is the code for the sun sensor .....which I have replaced....along with a few others.....
Any body have any suggestions??

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2003 SLK 230 (85000)
1999 E300 Turbo Diesel (388,000)
1991 350SD Turbo Diesel (185,000)