Audi A4 Owners & Service Manuals

Audi A4: Audi active lane assist/lane departure warning

Audi A4 (B9) 2016-2023 Owner's Manual / Assist systems / Driver assistance / Audi active lane assist/lane departure warning

General information

Applies to: vehicles with Audi active lane assist

The Audi active lane assist/lane departure warning (called only Audi active lane assist in the vehicle displays and in the information that follows in this Owner's Manual) can detect lane marker lines within the limits of the system. If you are approaching a detected lane marker and it appears likely that you will leave the lane, the system can warn you with corrective steering and a steering wheel vibration, if necessary.

The system functions in the speed range of approximately 40 mph - 155 mph (65 km/h - 250 km/h).

Applies to: vehicles with Audi adaptive cruise control and traffic jam assist

If the conditions are met, traffic jam assist switches on at speeds under approximately 40 mph (65 km/h).

WARNING

Observe the safety precautions and note the limits of the assist systems, sensors, and cameras.

Description

Applies to: vehicles with Audi active lane assist

Driver assistance
Fig. 119 Instrument cluster: driver assistance display

Display and warning

The availability, readiness to provide warnings, and the warnings are indicated with indicator lights. Audi active lane assist is ready to provide warnings if an object is detected on at least one side of the lane where your vehicle is traveling.

Driver assistance

If the system is switched on but is not ready to provide warnings, one of the following systems limits or situations could be the cause:

  • The necessary lane marker lines have not been detected (for example, in a construction zone or because the lines are obstructed by snow, dirt, water, or lighting)
  • The speed is below the activation speed
  • The lane is too narrow or too wide
  • The curve is too narrow
  • The driver's hands are not on the steering wheel
  • Visibility is obstructed by a rise or dip.

Steering intervention request

If Audi active lane assist intervenes multiple times when no steering activity is detected, the steering intervention request will provide a warning using audio and visual signals, such as .

Take over the steering and keep your hands on the steering wheel so that you will be ready to steer at any time. The system may no longer be ready to provide warnings after a short time, and it will only become active again later.

If the driver does not take over steering, Audi active lane assist will be switched off.

Behavior when a turn signal is active

Applies to: vehicles with side assist: The system will not warn you if you activate a turn signal before crossing the lane marker line. In this case, it assumes that you are changing lanes intentionally.

Applies to: vehicles with side assist: If the turn signal is activated, Audi active lane assist is ready, and a lane change has been classified as critical by lane assist due to vehicles traveling beside you or due to approaching vehicles, then a noticeable corrective steering movement will occur briefly before exiting the lane. This will attempt to keep your vehicle in the lane.

WARNING

  • Observe the safety precautions and note the limits of the assist systems, sensors, and cameras.
  • The system warns the driver that the vehicle is leaving the lane using corrective steering.
    The driver is always responsible for keeping the vehicle within the lane.
  • Corrective steering may not occur at all in certain situations, such as during heavy braking. Always be ready to intervene.

Tips

  • Always keep your hands on the steering wheel so you can be ready to steer at any time. The driver is always responsible for adhering to the regulations applicable in the country where the vehicle is being operated.
  • The system does not provide any corrective steering or steering wheel vibrations if it detects that you are passing another vehicle.
  • The image in the Driver assistance display only appears if it was opened in the trip computer.

Switching on or off

Applies to: vehicles with Audi active lane assist

Driver assistance
Fig. 120 Turn signal lever: button for Audi active lane assist

  • To switch the system on or off, press the button (1) on the turn signal lever. The respective indicator light in the instrument cluster will turn off or on.

WARNING

Observe the safety precautions and note the limits of the assist systems, sensors, and cameras.

Adjusting Audi active lane assist

Applies to: vehicles with Audi active lane assist

You can adjust Audi active lane assist individually.

The settings depend on the vehicle equipment.

  • Applies to: MMI: Select on the home screen: VEHICLE > Driver assistance > Audi active lane assist/Lane departure warning.

Possible settings:

  • Steering correction - In the Late setting, the steering correction will only occur shortly before a wheel crosses a detected lane marker line. In the Early setting, steering correction occurs continuously in order to help the driver keep the vehicle in the center of the lane. If the steering correction cannot be set, the steering correction will function in the Late setting.
  • Vibration warning - You can select if you would also like to be warned using a vibration in the steering wheel.

Tips

Certain settings are automatically stored and assigned to the remote control key being used.

Message

Applies to: vehicles with Audi active lane assist

If or is displayed when there is a malfunction, the active lane assist functions may be unavailable or limited.

A message that indicates the cause and possible solution may appear with some displays. The weather conditions may be too poor or the camera may be covered. Clean the area in front of the camera and try to turn on the systems again later.

If the malfunction remains, drive to an authorized Audi dealer or authorized Audi Service Facility immediately to have the malfunction corrected.

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