My horn got stuck on my '96 C280 to the point of burn out and I
tried to replace them myself (no mechanic here). I bought original
parts (2 horns) from a dicount parts dealer who assured me these 2
horns were the ones for my car. The boxes do say Merce-Benz Original
they are identical looking and a tiny bit smaller than the originals.
Originals are marked one with 400Hz and the other with 500Hz. The new
ones dont have any markings and look identical. They are not working
after what looked like a very easy install and now neither is my ac.