To differentiate the S4 from the A4, its interior has a dark overall colour scheme with a black roof liner and plenty of carbon fibre and Alcantara, and you can opt for bright red seat upholstery if you want to liven things up further. Everything you touch feels expensive enough to be in a car of this price – even the feel of the press of button feels a cut above the competition.
Nappa leather graces the seats, those in the front being more supportive than those in the regular A4, firmly holding you in place when cornering at speed. They’re electrically adjustable, with four-way lumbar support and even a massage feature to soothe on long journeys.
Every S4 gets a 10.1-inch colour touchscreen that does away with the physical controls you’d encounter in previous models. On occasion, though, the sheer amount of information it can display at any given time can be overwhelming, and is hard to register when you can only spare a glance when driving. Making selection on the move by touch isn't as intuitive as using the rotary controller that's a feature of BMW's iDrive system in the BMW M340i.
To help dilute this information overload, all S4 models also get a 12.3in screen behind the steering wheel in place of a traditional analogue speedo and rev counter. Dubbed Virtual Cockpit, this configurable screen can show full-screen sat-nav maps as well as other vital driving information. The S4 also gets a specific ‘S’ arrangement for the screen, dominated by a big central rev-counter, a bit like in the Audi R8 supercar.