ABS, side and head protection air bags standard. ESC standard from 2001.
Audi's high-performance AWD version of the A4 sedan uses the supercharged 3.0-liter six-cylinder. A six-speed manual transmission is standard and a seven-speed S-tronic automated manual is optional. In our previous tests, we found the ride stiff but not punishing. Handling was quite capable, but the S4 understeered a bit too much at its limits. Audi claims it now splits the torque with a rear bias to reduce understeer. The interior is well-finished and nicely appointed, with comfortable and supportive leather sport seats.