Distance warning function
Autonomous braking function
Situation-dependent brake force boosting
Active Brake Assist can help you to minimise the risk of a collision with vehicles, cyclists or pedestrians, or reduce the effects of such a collision.
If Active Brake Assist has detected a risk of collision, a warning tone sounds and the warning lamp lights up in the instrument cluster.
If you do not react to the warning, autonomous braking can be initiated in critical situations. In especially critical situations, Active Brake Assist can initiate autonomous braking directly. In this case, the warning lamp and warning tone are activated simultaneously with the braking application.
If you apply the brake yourself in a situation detected as critical by Active Brake Assist, or apply the brake during autonomous braking, situation-dependent brake force boosting occurs. The brake pressure increases up to maximum full-stop braking if necessary.
If autonomous braking or a situation-dependent braking boosting effect has occurred, the warning lamp flashes briefly and then goes out.
Vehicles with PRE-SAFE®: if the autonomous braking function or the situation-dependent brake force boosting is triggered, additional preventive measures for occupant protection (PRE-SAFE) may also be initiated More.
Active Brake Assist cannot always clearly identify objects and complex traffic situations.
Give a warning or brake without reason
Not give a warning or not brake
Active Brake Assist is only an aid. The driver is responsible for maintaining a sufficiently safe distance to the vehicle in front, vehicle speed and for braking in good time.
Observe the system limitations of Active Brake Assist. Due to the nature of the system, complex but non-critical driving conditions may also cause Active Brake Assist to intervene during braking.
Distance warning function
From approximately
30 km/h , if over several seconds the distance to the vehicle travelling in front is too near for the driven speed, the warning lamp lights up in the instrument cluster.From approximately
7 km/h , if your vehicle is critically close to a vehicle or pedestrian, an intermittent warning tone sounds and the warning lamp lights up in the instrument cluster.
Brake immediately or take evasive action, provided it is safe to do so and the traffic situation allows this.
Vehicles travelling in front: up to approximately
250 km/h Stationary vehicles: up to approximately
80 km/h Crossing vehicles: no reaction
Moving pedestrians/cyclists ahead: up to approximately
80 km/h Crossing cyclists: up to approximately
60 km/h Stationary pedestrians: no reaction
Vehicles travelling in front: up to approximately
200 km/h Stationary vehicles: up to approximately
50 km/h Crossing vehicles: no reaction
Cyclists ahead: up to approximately
80 km/h Moving pedestrians/crossing cyclists: up to approximately
60 km/h Stationary pedestrians: no reaction
Vehicles travelling in front: up to approximately
250 km/h Stationary vehicles: up to approximately
80 km/h Crossing vehicles: no reaction
Cyclists ahead: up to approximately
80 km/h Moving pedestrians/crossing cyclists: up to approximately
60 km/h Stationary pedestrians: no reaction
Fully depressing the accelerator pedal or with kickdown.
Releasing the brake pedal.
You manoeuvre to avoid the obstacle.
There is no longer a risk of collision.
An obstacle is no longer detected in front of your vehicle.
Full system performance is not yet available for a few seconds after switching on the vehicle or after driving off.
In snow, rain, fog or heavy spray.
If the sensors are dirty, misted up, damaged or covered.
If the sensors are impaired due to interference from other radar sources, e.g. strong radar reflections in multi-storey car parks.
If a loss of tyre pressure or a defective tyre has been detected and displayed.
In complex traffic situations where objects cannot always be clearly identified.
If pedestrians or vehicles move quickly into the sensor detection range.
If pedestrians are hidden by other objects.
If the typical outline of a pedestrian cannot be distinguished from the background.
If a pedestrian is not detected as such, e.g. due to special clothing or other objects.
In bends with a narrow radius.