Mercedes P/N for alternate tone horn is A4515420320.
On my '05 (Grey market) 450 the wiring for the second horn was already in place. It was plug and play. Much better sound with the two horns. Planing to do the same on my '13 451, just have not gotten around to it.
On my '05 (Grey market) 450 the wiring for the second horn was already in place. It was plug and play. Much better sound with the two horns. Planing to do the same on my '13 451, just have not gotten around to it.
