Mercedes 600 air conditioning fuse

Hi everyone, this is my first post on the forum and I'm asking for your help.
I work for my uncle and he has a Mercedes 600 SE. The problem is that the air conditioning is draining the battery, and his nephew, who's a mechanic, told him that removing the air conditioning fuse would stop it from draining the battery. The thing is, I have no idea which fuse it is, and I'm not sure if it would be a good idea to start removing them all to find the one. I would be extremely grateful if you could clear this up for me.
Thanks.