You're right. I remember taking delivery of my '87 W124030 and the salesman checking me out in my new dream machine and he depressed the horn on. $42,590.00 and I get a VW horn! I have two of them, the alarm system sounds the same! I was flipped out. Today I still have the road runner sound, I tell people it came from a Dodge Super Road Runner. I keep it as a novelty. Now I have been found out, Beep Beep. Happy Trails Beep Beep from Houston.