Found another one.
Porsche -
http://www.porsche.com/uk/multimedia/mobile/You need speakers for this - turned right up
Go to the tab marked "Sound" and the choose a car and then press "listen"
and then the best bit - start from the top and work you way down and press "Listen" all at the same time!
Annoys the dog - so its fun! - A bakers dozen all on your pc at the same time.
"Gentlemen - Please start your engines"
Kev_Mk3 - checked with the Vauxhall site, they don't anything like this..........
is my favorite.