Braking intervention
If the system detects that you are braking insufficiently when there is a risk of collision, Front Assist can increase the
braking force and help prevent a collision. The braking intervention takes place only for as long as you press the brake
pedal hard.
Front Assist limits
Front Assist is not available or its functions are restricted immediately after the vehicle is started. During this
time, the indicator lamp lights up in the display of the instrument cluster.
Front Assist has physical and system-related limitations. You should therefore always be prepared to take full control
of the vehicle if necessary.
Delayed response
If the camera or radar sensor is exposed to environmental conditions that impair functioning, the system may detect
this only after a certain delay. For this reason, any restrictions to functions may be displayed only after a delay at the
start of the journey and when driving (→ Autonomous Emergency Braking (Front Assist)).
Objects that cannot be detected
Front Assist cannot react – or will react with a delay – in the case of the following objects:
—Vehicles that are driving outside the sensor range in close proximity to your vehicle, e.g. vehicles that are driving
offset to your vehicle or motorbikes.
—Vehicles that change into your lane directly in front of your vehicle.
—Vehicles with bodies or attachments that project beyond the vehicle.
—Oncoming vehicles or vehicles crossing your path.
—Stationary or oncoming pedestrians; generally no reaction to persons without Pedestrian Monitoring.
—Stationary or oncoming cyclists; additionally no reaction to crossing cyclists without Cyclist Monitoring.
—When pedestrians and cyclists are not detected, for example because they are partially or fully hidden.
Function limitations
Front Assist may not react or may react with a delay or with an unwanted response in the following situations:
—In tight bends.
—Driving in heavy rain, snow, fog or heavy spray.
—Driving in multi-storey car parks and tunnels.
—Driving on roads with embedded metal objects, e.g. railway tracks.
—Reversing.
—If ESC
is performing a control intervention or is faulty.
—If the radar sensor or camera window is dirty, covered or damaged.
—If several brake lights on the vehicle are defective.
—If there is a fault in several brake lights on a trailer(country-dependent) or bicycle carrier with an electrical
connection to the vehicle.
—If the vehicle accelerates hard or the accelerator is fully depressed.
—In complex driving situations, e.g. at traffic islands.
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