All of a sudden I have no horn.
I checked the horn fuse .
I checked the horn replay.
I checked the alarm fuse.
I ran a hot wire from battery to horn and the horn blew ok.
When i push on the wheel to blow the horn, there is a ticking noise in the box where the relays/fuses are located.

What should I test next?? thanks.

__________________
Steve Danville
what i did myself.
CPS
rear shocks
MAS x 3.
SparkPlugs (twice)
Fuel pump & Filter
Window switch
replaced both failed horns with Honda horns.
Cleaned ERG Tube
Oil changes
Oil consumption Fix
Brake Pads
A/C Recharge
Anti-Freeze change X 2.
Front Shocks. Monroe. $90
Mercedes Warrenty Work:
Harmonic balancer,power steering clamp. Cat converters.Drive Shaft Bearing.s
Replaced Outer Lower Tie Rods and front lower ball joints at 156,000 miles