Where is the horn fuse on a 2002 Mercedes Benz C320 None is listed on the fuse listing but it does not work?

The fuse for the horn is located in the driver side fuse box under the hood and if u have a fuse chart it's a 15 amp fuse and it goes in slot #43. If you don't have a chart if u r facing the driver side of the car and looking directly at the fuse box it's the fuse in the top left corner and it's a blue 15 amp fuse. The fuse underneath it should be a red 7.5 amp fuse. I hope this helps because it took me a while to figure it out.