hi, i just took my cls500 to the dealer because my horn wasn't working properly i only heard a low sound. they said both horns need replacing, and they want $600 to change them!! can you believe this exorbitant sum?! i asked them why its so much they said the parts are $300 and labor is $300 as its a 2.5hr install since they have to remove the aromatic pump to reach the horns. is this true??? does anyone know the location of the horns on a cls500 and is it a straightforward install to do myself if i get the parts. i see the horns on ebay for about $50.00 each

thanks