Audi assists drivers with a broad range of assistance systems – from turn and parking assistants to the camera-based road sign recognition.
They deliver more safety, convenience and efficiency, and they pave the way for piloted driving.
As soon as the driver sets the turn signal, turn assist monitors the lane with oncoming traffic. Data from the two radar sensors and the front camera are used for this purpose. Turn assist can apply a brake intervention to prevent the vehicle from colliding with an oncoming vehicle during left or right turns in drive-off maneuvers or when driving slowly – up to a speed of 10 km/h (6.2 mph). This brake intervention keeps the vehicle within its own lane. The driver is informed of the intervention by an indicator in the instrument cluster.
Adaptive cruise control (with Stop&Go function)
Adaptive cruise control (ACC) offers relief to drivers especially on long trips and in stop-and-go traffic. It maintains a preset distance to the vehicle ahead by automatically accelerating and braking. The driver can choose from five distance levels and adjust acceleration and control system dynamics with Audi drive select.
The system uses radar sensors and a front camera. They detect vehicles ahead and measure the distance to them. In interplay with S tronic or tiptronic, the system covers the entire speed range from 0 to 250 km/h (155.3 mph). With a manual transmission, it starts at 30 km/h (18.6 mph). When the system is deactivated, the distance indicator shows the distance to the car ahead and warns drivers when they are tailgating. Its operating speed range is 60 km/h (37.3 mph) and above.
When combined with S tronic or tiptronic, ACC also includes the Stop&Go function. In heavy traffic, it autonomously decelerates the car to a stop. After a brief stop, it automatically resumes driving, following the vehicle ahead. After a longer stop, the driver must tap the accelerator pedal or the control stalk on the steering column. In addition to the radar sensors and front camera, ultrasonic sensors also monitor the vehicle’s immediate surroundings.
Hold assist enables convenient drive-offs when the car is on the usual inclines and descents of street traffic, and it prevents the vehicle from rolling. The system automatically switches over to the electromechanical parking brake when the vehicle is stopped for a longer period of time while hold assist is activated. This ensures that the car will remain stationary even without activation of the parking brake. In conjunction with S tronic, after a stop at a traffic light, for instance, the car drives off as soon as the driver presses the accelerator pedal. The system is activated by pushing a button.
Audi active lane assist
Operating at speeds from 65 km/h (40.4 mph), Audi active lane assist helps the driver keep the vehicle in the driving lane. A camera detects lane lines and the track that the car is following between them. In this process, the camera can distinguish between yellow lines in construction zones and standard white markings. If the car approaches a line without the turn signal being activated, the system helps the driver to steer back into the lane by means of gentle but noticeable interventions in the electromechanical power steering. In the MMI system, the driver sets how early the control intervention should occur. In the case of an early steering intervention point, the system guides the driver towards the middle of the lane by gentle, centering steering interventions. With a late steering intervention point, Audi active lane assist does not intervene until shortly before the detected lane marking might be crossed; then it gives a corrective steering intervention in the proper direction. In addition, the driver may choose to be warned by a vibration of the steering wheel when crossing detected lane markings.
Trailer maneuver assist
This system helps the driver to maneuver in reverse with a trailer. The driver can use the rotary/push-button control in the MMI to variably adjust the angle at which the trailer should be backed up. To travel in a straight line, the driver taps once on the control. The image from the rear view camera on the MMI monitor shows lines that serve as a guide. Trailer maneuver assist turns the steering wheel and directs the trailer onto the selected course. In this process, the driver steers the entire car-trailer combination with the rotary/push-button control. A rotating sensor in the trailer coupling serves as the technical basis of the trailer maneuver assist – it senses the articulation angle between towing vehicle and the trailer. Prior to use, drivers should briefly acquaint themselves with the system by driving a number of meters with a trailer. The trailer maneuver assist allows a driving speed of up to 10 km/h (6.2 mph). If the articulation angle is too large, the system emits a warning, and it brakes in case of an emergency.
Audi pre sense basic
Audi pre sense basic initiates preventive safety measures for occupants as soon as it recognizes a critical driving state. It utilizes information from various vehicle systems to determine this. For instance, it intervenes if the Electronic Stabilization Control (ESC) sensors detect skidding or hard braking. Then the system pretensions the seat belts of the driver and front passenger electrically to reduce their forward or lateral movements. The side windows and sliding sunroof are automatically closed. In addition, the hazard warning lights are activated to alert following traffic.
Audi pre sense city
At speeds of up to 85 km/h (52.8 mph), the system scans the road for other vehicles and pedestrians using a windshield-mounted front camera with a range of over 100 meters (328.1 ft). If it detects an impending collision, it warns the driver based on a graduated warning approach. First, there are visual and audible signals, then an extra warning jolt if the driver does not react. The warning time point can be set in the MMI system. In a second stage, the system automatically initiates hard braking. At speeds up to 40 km/h (24.9 mph) accidents can be avoided completely within system limits. At speeds between 40 and 85 km/h (24.9 and 52.8 mph), the brake intervention reduces the car’s velocity at impact. If installed, the actions of Audi pre sense are also triggered.
Audi pre sense front
The Audi pre sense front safety system is able to either avoid front-end collisions or minimize the severity of their consequences. It is available in combination with adaptive cruise control with Stop &Go, and it utilizes this other system’s radar sensors and the front camera. In a dangerous situation, Audi pre sense front uses a graduated warning concept to urge the driver to brake. First, it gives the driver visual and audible warnings, precharges the brake system and, if an adaptive air suspension is installed, it stiffens the shock absorbers. If the driver does not react, partial braking is initiated. Simultaneously, the system pretensions the seat belts, closes the side windows and sliding sunroof and activates the hazard warning lights. As a final action, Audi pre sense front initiates hard braking from speeds under 30 km/h (18.6 mph). The system is active over the car’s entire speed range up to 250 km/h (155.3 mph).
Audi pre sense rear
Audi pre sense rear uses radar sensors in the rear bumper to detect an impending rear-end collision, and it initiates preventive safety measures. These include pretensioning the front seat belts by electric power and closing the windows and sliding sunroof. In addition, the system activates the hazard warning lights to alert following traffic to the critical situation. In this process, the Rear-end collision alert signal (RECAS) is triggered, which flashes the hazard warning lights at a high frequency. Audi pre sense rear is active in background over the car’s entire driving speed range with the exception of trailer towing situations.
Audi side assist
The Audi side assist lane-changing assistant helps the driver to change lanes at driving speeds of 15 km/h (9.3 mph) and faster. It uses two rear-mounted radar sensors with a scanning range of roughly 70 meters (229.7 ft). If the system detects a vehicle located in the blind spot or approaching quickly from the rear, a warning LED is lit in the housing of the relevant exterior mirror. If the driver activates the turn signal anyway, the LED flashes several times in rapid succession.
Exit warning contributes to safety in city traffic. It is activated when the car comes to a stop. If other vehicles or bicyclists are approaching from the rear and are classified as critical, the system warns passengers not to open the doors. The system uses LED lights in the door trim for visual warning – depending on the model, it might be a light strip on the inside door handle or contour light in the door handle recess. In a situation assessed to be hazardous, the LEDs flicker four times and light red. The LEDs of Audi side assist are also lit in the relevant exterior side mirror. The exit warning remains active for approximately three minutes after the ignition is turned off. This system is based on two radar sensors of Audi side assist, which monitor the rear zones – behind the vehicle and to the sides at the rear.
Collision avoidance assist
Collision avoidance assist helps the driver steer around an obstacle in a critical situation. The system uses data from the two radar sensors and the front camera for this purpose. In calculating a suitable evasive maneuver corridor, it takes into account the distance, width and offset of the vehicle driving ahead. First, a jolt is produced to warn the driver of the hazard. If the driver then actively avoids the obstacle, the assistant applies a slight steering torque that helps by correcting the driver’s steering input or helping to make a necessary lane change. Collision avoidance assist is available over the speed range from approx. 30 to 150 km/h (18.6 to 93.2 mph), and it assumes that the driver is actively steering during the entire maneuver. The driver is informed of the intervention by an indicator in the instrument cluster.
Multicollision brake assist
Multicollision brake assist automatically brakes the vehicle in the event of an accident, thus reducing the danger of skidding as well as the risk of further collisions. A special sensor system is used to detect a collision. The safety computer determines the severity of the crash and the reduction in speed associated with the collision. If defined thresholds are exceeded, the safety computer sends a corresponding message to the Electronic Stabilization Control (ESC) control unit to trigger an automatic brake application, taking the system status into account. The vehicle is not automatically braked if the driver presses on the accelerator. The same is true if the ESC, the brake system or the electrical system are not functioning.
Parking system, rear
Parking system, rear makes it easy to maneuver and park – even in small spaces. While reverse gear is engaged, the system warns the driver with audible signals as soon as the distance to a detected object behind the vehicle is classified as critical. For this purpose, the system utilizes ultrasonic sensors that are inconspicuously integrated into the rear bumper. They also detect obstacles outside of the driver’s field of view. Increasing frequency of the audible warning indicates that the distance to the obstacle is decreasing. At around 30 cm (11.8 in) distance to the detected object, the driver hears a constant tone – the signal to stop.
Parking system plus
Parking system plus informs the driver, visually and audibly, about obstacles in front of and behind the vehicle. The warnings are made when the distance to a detected object in the path of driving is less than 90 cm (35.4 in) – depending on the specific model – after the driver has engaged reverse gear and activated the system by pushing a button on the center console. Ultrasonic sensors inconspicuously integrated into the bumpers measure the distance. The MMI display depicts it visually. A white segment shows a detected object outside of the driving path. Red segments represent detected objects within the driving path. The virtual driving path display also shows lateral guide lines which are precalculated based on the currently selected steering input and thereby assists in convenient parking and exiting. Increasing frequency of the audible warning indicates that the distance to the obstacle is decreasing. At around 30 cm (11.8 in) distance to the detected object, the driver hears a constant tone – the signal to stop.
High-beam assist utilizes a camera mounted on the interior mirror. It detects light sources – the headlights of oncoming vehicles, tail lights of other road users and the reflections of municipality limit signs, for instance – and automatically switches between high beam and low beam lighting. This provides for better visibility and a more relaxed driving experience. Drivers of oncoming vehicles are not blinded by glare.
Cruise control maintains a desired driving speed constantly starting at around 30 km/h (18.6 mph) (model dependent), provided that it can be maintained by engine power and engine braking effects. The system offers relief to drivers in this way – especially on long trips. At the same time, the constant speed mode of driving contributes towards lower fuel consumption and lower CO2 emissions. The system is operated via a separate steering column stalk, and the preset driving speed is shown in the instrument cluster. The system is deactivated when the driver brakes.
The configurable speed limiter limits driving speed to a value set by the driver within the speed range of 30 to 250 km/h (18.6 to 155.3 mph) – which is very helpful within city limits or construction zones, for example. When the preset limit is reached, the vehicle gently throttles the speed down. The speed limit is not exceeded even if the driver applies more pressure to the accelerator pedal. However, the driver can temporarily override the limit by kick-down, and the speed limiter can be completely deactivated at any time from the steering column stalk. The speed that has been preset is shown in the instrument cluster.
Emergency Assist detects, within system limits, when the driver is inactive. In such a case, the system assumes control of the vehicle and automatically brakes it to a standstill in its own lane. Emergency Assist monitors the driver’s steering activity. If it detects that the driver is inactive, it prompts the driver repeatedly, via visual and audible warnings and by brake jolts, to actively take over control of the vehicle again. With the first strong brake jolt at a driving speed below 80 km/h (49.7 mph), the hazard warning lights are also activated to warn the surrounding traffic. If the driver remains inactive, despite the warnings, Emergency Assist brings the vehicle to a standstill within system limits, and the parking brake is engaged. The driver can deactivate Emergency Assist at any time by moving the steering wheel, pressing the brake or accelerator pedal or by shutting off active lane assist or adaptive cruise control.
Emergency Assist represents an extension of Audi active lane assist, and it can use the functions of adaptive cruise control and pre sense front. It is only activated when active lane assist is activated and prepared for warnings, and adaptive cruise control is switched on or active.
Park assist can automatically steer the vehicle into parallel or perpendicular parking spaces. It uses ultrasonic sensors for this purpose, which are located in the front and rear of the bumpers and in the sides of the bumpers. The sensors measure parking spaces along the road while driving past them at moderate speed. To achieve optimal results, this speed should be a maximum of 20 km/h (12.4 mph) for perpendicular parking spaces and a maximum of 30 km/h (18.6 mph) for parallel spaces. A message appears on the MMI display when the system finds a suitable spot. The only actions required of the driver in parking are to accelerate, shift gears and brake. The system handles the entire steering process. In addition, audible signals help the driver. Park assist will steer multiple forward and backward maneuvers if necessary. It can also exit from parallel parking spaces. The driver activates the system by pushing a button on the center console.
Predictive efficiency assistant
The predictive efficiency assistant works closely with Audi adaptive cruise control (ACC), the Audi navigation system and the camera-based traffic sign recognition. When ACC is active, the system predictively and automatically adjusts the preselected speed to conditions – the route topography, speed limits and the traffic ahead. Regardless of whether route guidance is active or not, the predictive efficiency assistant uses the route data to alert the driver about situations that call for lower speeds. The system recognizes curves, traffic circles, intersections, gradients, city limits and speed limit signs – in many cases long before the driver sees them. A corresponding warning appears in the instrument cluster and/or the Audi virtual cockpit and head-up display. If the driver wishes, the system can control the free-wheeling of the eight-speed tiptronic itself. This coasting operation is only activated if it can be used for a longer period of time. When it ends, the car automatically accelerates to the speed the driver has selected, provided the ACC is activated. The predictive efficiency assistant can reduce fuel consumption on country roads by up to 10 percent.
The reversing camera simplifies maneuvering by showing the zone behind the vehicle on the MMI display. It shows the calculated driving track based on the steering angle as well as auxiliary lines and guide lines. For parallel parking, the latter lines precisely direct steering into the parking space in conjunction with steering reversal points. The virtual blue surface in the camera image indicates where the vehicle will be positioned after the parking procedure. The reversing camera is inconspicuously integrated into the handle trim strip of the luggage compartment lid. It is active as soon as the driver engages reverse gear or has activated the system by pushing a button on the center console.
Traffic jam assist
Traffic jam assist is a subsystem of adaptive cruise control (ACC). In vehicles with an automatic transmission, traffic jam assist can assume certain steering tasks over a speed range up to 65 km/h (40.4 mph) on roads that are in good condition, as long as the traffic is moving slowly. The system uses the radar sensors and the front camera. It guides the car by making gentle steering movements within system limits. Traffic jam assist orients itself to lane markings, roadside structures and other vehicles on the road. When traffic jam assist reaches its system limits – such as when the traffic thins out or there is a sharp curve ahead – the driver must assume driving tasks again. If the driver does not, the system warns the driver in several stages. As a final measure, it autonomously brings the car to a safe stop.
Cross traffic assist rear
Rear cross traffic assist warns the driver of approaching vehicles it deems critical when slowly backing up, such as when pulling out of a perpendicular parking spot. It uses the rear radar sensors for this. They cover the zone at the rear, including the driving lanes to the left and right behind the vehicle. The warnings are progressive – initially a visual warning is shown in the MMI display (in the park assist display). The situation is represented in a virtual top view and in the “rear” and “rear side” camera views. Red arrows behind the vehicle point in the direction from which there is a potential hazard. If the driver does not react to the visual display, an audible signal sounds before the system warns the driver with a brake jolt. This helps to avoid accidents while exiting parking spaces.
360 degree cameras
Four cameras on the vehicle scan the surroundings and depict obstacles in the immediate vicinity of the vehicle. The driver can choose from different camera views which simplify parking and maneuvering. In the “Surroundings” view, he gets an overview of the overall parking situation in a top view shown in the MMI display. It can help to position the vehicle more precisely in the parking space. The “front” and “rear side” views enable better visibility when exiting tight parking spaces or driveways. The practice-proven reversing camera view and a similar view toward the front round out the display options. The system is automatically activated when driving in reverse or by pushing a button on the center console.
Traffic sign recognition
Camera-based traffic sign recognition detects traffic signs such as speed limit signs (including digital signs), no passing zones, entry restriction signs and other auxiliary signs, and it shows them to the driver in graphic form. They then appear in the driver information system and/or the Audi virtual cockpit as well as in the head-up display. The camera on the windshield also detects temporary speed restrictions such as in construction zones, as well as time- and weather-conditional restrictions. The system shows the currently applicable speed limit. For example, if a lower speed applies when the road is wet, this value is displayed – if the windshield wipers are on. Speed limits that are only in force at certain times of day are only shown at those times. In addition, the driver can choose a warning threshold as an offset to the legal speed limit. When this threshold is exceeded, a visual warning is given.
Further information about the official fuel consumption figures and official, specific CO2 emissions of new passenger cars can be found in the “Guide to fuel consumption, CO2 emissions and electricity consumption of new cars,” which is available free of charge from all sales outlets and from DAT (Deutsche Automobil Treuhand GmbH), Hellmuth-Hirth-Strasse 1, 73760 Ostfildern-Scharnhausen, Germany (http://www.dat.de).