Leather upholstery is standard, though, 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.
Otherwise, Bluetooth (hands-free and audio streaming), a navigation system, Sirius real-time traffic, and an iPod connectivity kit are options, as is a high-quality Bang & Olufsen audio system. The sound system lacks a USB input, but turn it up with SD or CD inputs and the sound is rich and satisfying. Last year HD Radio was wrapped into the package, with navigation.
Standard equipment is richer in the S4. In addition to the sport suspension and host of other upgrades, the 2012 Audi S4 includes heated washers, sport seats with alcantara inserts, aluminum door inserts, and the three-zone climate control system. But you can get some of that look in the mainstream A4 lineup; for 2012, Audi has added a new Style Package for the A4 Premium, made the former S line exterior package standard on Premium Plus and Prestige models, and added a newly available 18-inch, ten-spoke wheel design.