|
|
Applies to: vehicles with Audi pre sense front
- Fig. 161 Instrument cluster: Collision warning
Description
In certain situations and at certain speeds, pre sense front can warn you if there is a danger of collision with crossing pedestrians1) or stationary, parked and moving vehicles, and can apply the brakes if necessary.
Pre sense front will not react if it is not in a position to detect the danger.
In conjunction with pre sense basic, the following functions may be initiated, depending on how fast the vehicle is travelling:
- Activation of reversible front seat belt tensioners.
- Automatic closing of windows and panorama sun roof*.
Advance warning/acute warning
The system can give visual and audible warnings if it detects a dangerous situation. An advance warning can be given if:
- A vehicle in front brakes suddenly.
- Your own vehicle approaches a stationary vehicle at a speed of approx. 30 to 85 km/h.
- Your own vehicle approaches a much slower vehicle travelling in the same direction or a stationary vehicle ahead at a speed of approx. 30 to 250 km/h.
- A crossing pedestrian2) moves into your lane and you are travelling at a speed of approx. 30 to 65 km/h.
If this warning is given, you may need to take evasive action or brake hard to avoid a collision. The driver message Audi pre sense 
Fig. 161► and a warning tone draw your attention to the danger.
Fig. 161► and a warning tone draw your attention to the danger.
In the event of an impending collision with a vehicle, an acute warning is also given in the form of a brake jolt. If you do not respond to the acute warning, pre sense front can, subject to general system limitations, apply the brakes with increasing brake force, in order to slow the vehicle down and take the impact out of a potential collision.
Automatic braking
Pre sense front can initiate an automatic brake application at certain speeds just before a collision:
- At up to 45 km/h if vehicles are stopped.
- At up to approx. 250 km/h if moving or stationary vehicles are detected ahead.
- At up to approx. 65 km/h if pedestrians are crossing2).
Automatic brake pressure increase
If pre sense front detects that you are not braking hard enough in the event of an impending collision, it will increase the brake pressure, depending on the situation and speed:
- At up to 85 km/h if vehicles are stopped.
- At up to approx. 250 km/h if moving or stationary vehicles are detected ahead.
The protection provided by pre sense front is still subject to the prevailing physical limits. It is a driver assist function and cannot prevent a collision in every situation. The driver must always intervene personally. As the driver you are always responsible for braking in good time. Do not let the extra safety provided tempt you into taking any risks when driving – this can cause accidents.
- Please note that pre sense front can give warnings or apply the brakes unexpectedly. Always secure your luggage to prevent damage and possible injury.
- Due to inherent system limitations, false activation of the system is possible.
- Please note that the sensor is not always able to detect all objects which may represent a potential hazard - risk of accident!
- Pre sense front does not react to the following: oncoming traffic in the same lane, stationary or stopped persons, pedestrians crossing the road at an angle, groups of people, animals, or objects that are hard to recognise ►.
WARNING
The pre sense front functions may be restricted or unavailable in situations such as the following:
- If objects such as crash barriers or other vehicles are reflecting additional light.
- At tunnel entrances.
- In heavy fog, rain, road spray or snow.
- If the radar sensor is dirty, frosted, damaged or covered.
- When driving through a corner.
- If the ESC system has been partially or fully deactivated.
CAUTION
Impacts or damage to the bumper, wheel arches or underbody can cause misalignment of the sensor. This can impair the function of the pre sense front system. Have the systems checked by a qualified workshop.
Note
- The automatic brake application with increasing brake force can be cancelled by applying the brakes yourself or by pressing the accelerator firmly or by taking evasive action.
- Certain pre sense front functions are deactivated when the ESC sport mode is switched on and when reversing.
- The pre sense is deactivated if you restrict or switch off the ESC link►.