Semi-automatic vehicle control in a medical emergency
(Emergency Assist)
Emergency Assist can detect a lack of activity on the part of the driver and keep the vehicle in the
lane automatically, or brake the vehicle to a standstill if required. The system can therefore
actively contribute to preventing or reducing the consequences of an accident.
Emergency Assist is an extension of the lane keeping system (Lane Assist) and combines these
functions with the Adaptive Cruise Control (ACC) . Please therefore read both these chapters and
observe the information about the system limits and warnings.
Description
If there is no driver activity, Emergency Assist prompts the driver to take control of the vehicle by
visual and acoustic warnings and by braking jolts.
If the driver remains inactive, the system automatically controls the accelerator, brake and steering
to slow the vehicle down and keep it in lane → . If there is sufficient stopping distance, the
system decelerates the vehicle to a complete stop and switches on the electronic parking brake
automatically (→ Electronic parking brake, Operation).
When Emergency Assist is actively controlling the vehicle, the hazard warning lights are switched on
and the vehicle performs slight snaking movements within its lane to warn other road users.
The hazard warning lights can be deactivated by pressing the accelerator or brake, by making a
steering intervention or, depending on the situation, by pressing the button for the hazard warning
lights.
When Emergency Assist has been triggered, the system is not available again until the ignition has
been switched off and then back on.
Prerequisites
—The lane keeping system and ACC are switched on.
—The selector lever is in D/B position or in the Tiptronic gate.
—The system has detected a road lane marking on both the right and left sides of the vehicle.
Switching Emergency Assist on and off
Emergency Assist is automatically activated when the lane keeping system is switched on (→ Lane
keeping system (Lane Assist), Operation).
WARNING
The intelligent technology used in Emergency Assist cannot overcome the physical limits specified,
and functions only within the limits of the system. The driver is always responsible for controlling
the vehicle.
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Adapt your speed and distance from the vehicles ahead to suit visibility, weather, road and
traffic conditions.
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Your hands should always be on the steering wheel so that you can steer at any time.
Emergency Assist cannot always prevent accidents and serious injuries on its own.
If the radar sensor for the Adaptive Cruise Control (ACC) or the camera for the lane keeping
system are covered or have been displaced, Emergency Assist may carry out unwanted brake or
steering interventions.
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Emergency Assist does not react to persons, animals or vehicles crossing or approaching in the
same lane.
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