FYI: My best friend is VP/GM of LA Auto Gallery
Over the last week, he loaned me his Carrera S, & an A4.
Even though the Carrera has DVD audio, the ELS system blows it away.
Of course, no comparison in terms of driving lol.
This Carrera did not have Nav, so I couldn't compare.
The A4 had cheap controls, & a DVD Nav; the TL blows it away; especially the Nav screen. The A4 Ipod interface wouldn't shuffle the tracks, & I couldn't get it to automatically change songs. I had to manually change every song; weird. I had the 3.2 Quattro/AWD; nice ride, but no TL.
I enjoyed both rides for my week's stay.
Kudo's to Acura for better seats, more room, & a much better audio system
FYI: the Audi Bluetooth was annoying; every time you get in the car, you have to manually link my BlackBerry; not in my TL!