DO NOT SHOUT. It is rude and offensive.
Remove the CCU (Climate Control Unit), and resolder all button connections to circuit board.
Do a search, all instructions have been posted many times.
Good Luck, and post the success story.

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1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car
609 Certified