Leather upholstery is standard, along with Sirius Satellite Radio; a CD player; cruise control; a sunroof; and Audi's MMI system, which uses a rotary controller to aid the driver in setting climate, audio, and phone functions on the go. It's a menu-based system like BMW's iDrive, but the software's a little more user-friendly and logical.
The Premium Plus Package—which our editors found to be a decent value—includes tri-zone climate control, Bluetooth, heated seats, a garage-door opener, trip computer, and rain/light sensors, and an auto-dimming mirror, among other features. The sound system lacks a USB input, but turn it up with SD or CD inputs and the sound is rich and satisfying.
Bluetooth, a navigation system, Sirius real-time traffic and an iPod connectivity kit are options, as is a high-quality Bang & Olufsen audio system. Audi gives buyers a choice of wood and leather colors, and the lighter palette introduced in the current generation is quite handsome and makes the cabin feel airy. For 2011, HD Radio is newly available with the navigation system, Nutmeg Laurel wood replaces Beige Birch, and there's a new Titanium Sport package.
Standard equipment is richer in the S4. In addition to the sport suspension and host of other upgrades, the 2011 Audi S4 includes heated washers, sport seats with alcantara inserts, aluminum door inserts, and the three-zone climate control system.