I have a 2006 c230 where is the fuse for the horn or whats the problem

Check fuses

I would say a new horn

Put battery voltage directly to it
& see if it works

If it made any sound-- how could it be a fuse ?

If it was a fuse, nothing would happen & a new
fuse wouldn't do anything, until you found & fixed
the reason a fuse failed

I would suspect an underhood fuse, the steering wheel clock spring, or a wiring problem. It's cheap to triple check all the fuses. The other two will require some troubleshooting to figure out. Since the horn works with the keyless entry, the relay, the horn, and its control wiring seem to be ok.

Your horn relay perhaps.

the horn does not work on my 2006 saturn vue change all fuses and relay switch. were is the horn location

Check the connection at the horn. It could be dirty, lose or corroded. There may be a relay for it somewhere.
I don't where the horn is located, usually up front around the grill.
If you are handy, try unplugging the horn and run a jumper wire from the battery to the horn and see if it honks. I don't know if your horn grounds by the mount or of you need to run a pos and neg to it.

check the horn relay # 25 ; located underhood in the fuse and relay box.

most new cars have what is called a clock spring be hind the steering wheel.this is a flat ribbon cable like what you would Se in a computer.what can happen when the ribbon is damaged is the horn can quit working.the cruse control .and the air bag light will come also.but most likely one of the problems will occur.but over time the other problems start happening also.so are you sure you are getting power to the relay .use a volt meter on the terminals under the relay and have someone to push the horn button.this will tell you if you are getting power from the horn button.

check fuse then check relay or just check for power on the horn it self

works manual only ,not given out to stop weekend mechanics form working on cars,