Mercedes 600 air conditioning fuse

Hello everyone, it is my first message in the forum and it is to ask you for help.
I work for my uncle and has a Mercedes 600 se, he has the problem that he consumes the air conditioning and has told him a nephew that is a mechanic that removing the fuse of the air stops consuming battery, the case is that I have no idea what that fuse is and I do not know if it would be very convenient to line to remove everyone to see what it is, I would appreciate the question.
Thank you.