The wide range of driver assistance systems in the two new S models sets new standards. Audi is bringing them from the full-size class to mid-size cars, and in the S4* it is bundling them into the Tour, City and Parking packages.
Playing a central role here is adaptive cruise control (ACC) Stop&Go including traffic jam assist. It relieves drivers in slow-moving traffic up to a driving speed of 65 km/h (40.4 mph) not only by assuming the tasks of braking and accelerating but also steering on well-built roads. The predictive efficiency assistant, unique in this vehicle class, helps by offering drivers situation-specific tips on how to save fuel. It evaluates GPS information in the immediate vicinity of the car. On highways it can improve fuel economy by up to ten percent in this way.
Moreover, Audi also offers an entire array of innovations that improve safety. Park assist uses twelve ultrasonic sensors to assist in parallel and perpendicular parking, so that the driver only has to control the accelerator, shift gears and brake. Rear cross traffic assist helps in backing out of parking spaces with poor visibility and warns of approaching traffic – visually, acoustically and by a brake jolt.
The exit warning system becomes active when the new Audi S4* and S4 Avant* has come to a stop. Now, if other vehicles are approaching from the rear, the system warns all occupants before opening the doors by lighting LED light conductors in the interior side trim. Collision avoidance assist is automatically enabled if the new mid-size sports car has to drive around an obstacle to avoid an accident. Based on data from the front camera, ACC and radar sensors, it computes a recommended driving line within fractions of a second. Its first action is a warning jolt to alert the driver to the danger. As soon as the driver steers, the system helps to change lanes by intervening in the power steering system with steering torques that guide the driver.
Turn assist monitors oncoming traffic when turning left over a driving speed range from two to ten km/h (1.2 - 6.2 mph). In a dangerous situation, it brakes the car to a stop. The system is active in the background as soon as the driver activates the turn signal to turn across the carriageway.
The production solution Audi pre sense city monitors for other vehicles and pedestrians up to a driving speed of 85 km/h (52.8 mph); in an emergency it can brake the car to a stop. Other assistance systems such as camera-based traffic sign recognition, Audi active lane assist and Audi side assist round out the line-up.
The equipment and data specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.