Principle
The Forward Collision Warning warns of a possible risk of collision and may brake independently.
In the event of an accident, the system may reduce impact speed.
General information
Sensors detect the traffic situation.
The system issues a two-phase warning of a possible risk of collision with vehicles at speeds above approx. 3 mph/5 km/h. The timing of warnings may vary with the current driving situation.
When the vehicle is driven so that it is intentionally approaching another vehicle, the Forward Collision Warning and brake intervention are delayed in order to avoid false system reactions.
Depending on the vehicle equipment, the Driver Attention Camera in the instrument cluster captures the driver's field of vision. Additionally, the system checks for visual impairments. Field of vision and visibility also affect the timing of the warnings.
Safety information
Warning
The system cannot serve as a substitute for the driver's personal judgment in assessing visibility and traffic situation. There is a risk of accident.
Adjust driving style to traffic conditions. Watch traffic closely and actively intervene where appropriate.
Warning
Indicators and warnings cannot serve as a substitute for the driver's personal judgment. Due to its limits, the system may not issue warnings or reactions, or these may be issued late or in a manner that is not consistent with their normal use. There is a risk of accident. Adjust driving style to traffic conditions. Watch traffic closely and actively intervene where appropriate.
Warning
Due to system limits, individual functions can malfunction during tow-starting/towing with the Intelligent Safety systems activated. There is a risk of accident. Switch all Intelligent Safety systems off prior to tow-starting/towing.
Overview
Button in the vehicle
Intelligent Safety
Sensors
The system is controlled by the following sensors:
Additional information: Sensors of the vehicle.
Turning on/off
Turning on automatically
The system is automatically active when the vehicle is turned on.
Switching on manually
Press the button.
The menu for the Intelligent Safety system is displayed.
If all Intelligent Safety systems were switched off, all systems are now switched on.
"Configure INDIVIDUAL": depending on the equipment version, the Intelligent Safety systems can be individually configured. The individual settings are activated and stored. As soon as a setting is changed on the menu, all settings of the menu are activated.
Press the button repeatedly.
The following settings are switched between:
"ALL ON": all Intelligent Safety systems are switched on. Basic settings are activated for the subfunctions.
"INDIVIDUAL": the Intelligent Safety systems are switched on according to the individual settings.
Some Intelligent Safety systems cannot be individually switched off.
Manual switching off
Press and hold this button.
All Intelligent Safety systems are switched off.
Button lights up green: all Intelligent Safety systems are switched on.
Button lights up orange: some Intelligent Safety systems are switched off or currently unavailable.
Button does not light up: all Intelligent Safety systems are switched off.
Setting the warning time
1. "CAR".
2. "Settings".
3. "Driver Assistance".
4. "Safety and Warnings".
5. "Forward Collision Mitigation".
6. Select the desired setting:
Warning with braking function
Display
A warning symbol appears in the instrument cluster and in the Head-up Display, where available, if a collision with a detected vehicle is imminent.
Icon lights up red: prewarning.
Brake and increase distance.
Symbol flashes red and an acoustic signal sounds: acute warning.
Brake and make an evasive maneuver, if necessary.
Prewarning
This warning is provided, for instance when there is impending danger of a collision or the distance to the vehicle ahead is too small.
If a prewarning is provided, respond by braking as warranted.
Acute warning with braking function
An acute warning is displayed in case of the imminent danger of a collision when the vehicle approaches another object at a high differential speed.
Intervene in the case of an acute warning. Depending on the driving situation and the equipment version, the acute warning may be accompanied by a brief activation of the braking system.
With the warning time setting "Late" the brief activation of the braking system is omitted.
If an acute warning is provided, the system may also provide assistance, such as through automatic brake intervention, when there is risk of collision.
Acute warnings may be provided even when there has been no prior warning.
Brake intervention
The warning prompts the driver to intervene. If a warning is active, the maximum braking force is used when the brake is applied. The brake pedal must be applied sufficiently quickly and forcefully.
The system may also assist in braking if there is a risk of collision.
When the vehicle is traveling at a low speed, the vehicle may come to a complete stop.
City brake function: the brake intervention occurs to up to approx. 50 mph/80 km/h.
With radar sensor: the brake intervention occurs to up to approx. 155 mph/250 km/h.
At speeds above approx. 130 mph/210 km/h, the brake intervention occurs as a brief braking pressure.
No automatic delay occurs.
The brake intervention can be interrupted by stepping on the accelerator pedal or by actively moving the steering wheel.
The system's ability to detect objects may be limited in some circumstances. Refer to the information in this Owner's Manual regarding the limitations of the system and actively intervene as warranted.
System limits
Safety information
Warning
The system is designed to operate in certain conditions and circumstances. Due to conditions or other factors, the system may not respond.
There may be a risk of accident or risk of damage to property. Actively intervene as warranted. Refer to the information in this Owner's Manual regarding the scope of the system's operation and limitations.
Detection range
The system's detection capability is limited.
Only objects that are detected by the system are taken into account.
Thus, a system reaction might not come or might come late.
The following situations may not be detected, for instance:
Upper speed limit
If the vehicle speed exceeds approx.
155 mph/250 km/h, the system is deactivated temporarily. When the vehicle slows down to below this speed, the system is reactivated.
System limits of the sensors
Additional information:
Functional limitations
The system may be limited in the following situations:
Warning sensitivity
The more sensitive the warning settings are, for example the warning time, the more warnings are displayed. Therefore, there may also be an excess of premature or unjustified warnings and reactions.