Electronic Stabilisation Program (ESP)
ABS and ASR traction control systems are integrated into the Electronic Stabilisation Program
(ESP). In short, ESP helps ensure that the vehicle goes where you steer it even inextreme driving
conditions. The ESP system constantly compares the actual movementof the vehicle with pre-
determined values and should a situation arise where the vehicle starts to skid, ESP will apply the
brakes to individual wheels and automatically adjust the engine’s power output to correct the
problem. ESP prevents the vehicle from losing control when trying to avoid an accident, for example.
It also reduces the effects of understeer or oversteer.
Emergency Assist*
Emergency Assist monitors the driving characteristics and recognises, within the limits of the system,
if the driver suddenly becomes incapable of driving (due to the vehicle not being controlled).
Emergency Assist detects a lack of activity on the part of the driver and issues repeated visual and
acoustic warnings and initiates a quick jolt of the brakes to request the driver to take control of the
vehicle.
If the driver remains inactive, the system automatically controls acceleration, braking and steering
to slow the vehicle down and keep it in the lane. If there is sufficient stopping distance, the system
decelerates the vehicle to a complete stop and switches on the electronic parking brake automatically.
When Emergency Assist is actively controlling the vehicle, the hazard warning lights are switched on
and the vehicle performs a slight snaking motion within its lane to warn other road users. Ideally this
will prevent a collision, or at least reduce its severity.
Emergency Assist cannot replace the driver's attentiveness. The driver is still legally responsible for the vehicle and must
monitor the speed and distance in relation to other vehicles. Emergency Assist utilises both the Adaptive Cruise Control
(ACC) and Lane Assist driver assistance systems. The ACC system should not be used on winding roads or in adverse
weather conditions such as heavy rain. The system will not work if there are no recognisable lane markings. The camera
vision can be reduced by rain, snow, heavy spray or oncoming lights. This and vehicles in front of you can lead to the lane
markings not being recognised by the Lane Assist system.
Extended Electronic Differential Lock (XDL)
XDL is an extension of the Electronic Differential Lock (EDL) function. When cornering, XDL responds
to the load relief at the front wheel on the inside of a corner. The ESP hydraulics are used for the
XDL to apply pressure to the wheel on the inside of the corner in order to prevent wheel spin. This
improves traction and reduces the tendency to understeer.
As a direct result of the one-sided and precise braking pressure, cornering is sportier andmore
accurate.
Front Assist with City Emergency Brake (City EB) and Pedestrian
Monitoring functions
The Front Assist ambient traffic monitoring system uses a radar sensor to detect critical distance
situations and thus help to shorten the braking distance, reducing the risk of a rear-end collision.
The traffic ahead is monitored constantly by the radar at the front. If a vehicle is detected ahead of
you in the lane, the distance and the speed relative to it are calculated. If the gap is closing too fast,
Front Assist initially warns the driver by means of an audible as well as a visual signal. At the same
time, the brake pads are brought into contact with the brake discs and the sensitivity of the Brake
Assist is increased. This primes the braking system for a possible emergency stop. Furthermore,
an automatic jolt of the brakes warns the driver of the danger. If the driver also fails to react to the
warning jolt, Front Assist brakes automatically, helping to avoid a collision or reduce the severity of
the accident.
The City Emergency Brake (City EB) function is a radar based emergency braking system designed
to help a driver avoid a low-speed crash or to reduce its severity. At vehicle speeds below 30km/h,
City EB monitors the area ahead of the car for vehicles which might present a threat of collision. If
a collision is likely, City Emergency Braking first pre-charges the brakes and makes the emergency
Brake Assist system more sensitive: if the driver should notice the risk, the car is ready to respond
more quickly to their braking action. However, if the driver still takes no action and a collision becomes
imminent, City Emergency Braking independently applies the brakes very hard. If the driver intervenes
to try to avoid the accident, either by accelerating hard or by steering, City EB will deactivate and
allow the driver to complete the avoidance manoeuvre.
Pedestrian Monitoring is an extension of the Front Assist monitoring system featuring the City
Emergency Brake. The system uses a radar sensor in the radiator grille to monitor the area in front of
the vehicle and within the limits of the system, register certain situations, for example a pedestrian
stepping onto the road suddenly. The system then gives an immediate acoustic and visual signal to
warn the driver. If the driver does not brake, the system initiates a jolt of the brake as a warning about
the critical situation, while at the same time preparing for hard braking. If the driver fails to react, the
system automatically performs emergency braking, within system limits. Ideally this will prevent a
collision, or at least reduce its severity.
Front Assist with City Emergency Brake (City EB) and Pedestrian Monitoring cannot replace the driver's attentiveness. The
driver is still legally responsible for the vehicle and must monitor the speed and distance in relation to other vehicles.
Lane Assist*
Lane Assist is a lane departure warning system that is designed to help reduce the likelihood of the
vehicle leaving the road or crossing into on oncoming lane and therefore the risk of accident as a result
of driver distraction or a lapse in concentration.
The Lane Assist system monitors the road ahead with the aid of a camera (located near the interior
rear-view mirror) which recognises lane markings and evaluates the position of the vehicle. If the
vehicle starts to leave the lane, the Lane Assist system takes corrective steering action. If this is not
sufficient the driver is warned about the situation by a steering vibration and is asked to take over the
steering. Additionally, if no active steering movements by the driver are recognised for longer than
approximately 8 seconds, a message will appear in the Multi-Function Display in conjunction with a
warning tone. The corrective steering function can be overridden by the driver at any time and the
system does not react if the turn indicator is set before crossing a lane marking.
When adaptive lane guidance* is active and the system detects both lane markings to the left and
right of the vehicle, the function provides permanent assistance while the vehicle is in motion. The
system adopts the preferred position within the lane in which the vehicle is travelling. For example,
if the vehicle is being driven slightly off-centre in the lane, the system will learn to adopt the new
position within a short period of time.
Lane Assist cannot replace the driver's attentiveness. The driver is still legally responsible for the vehicle and therefore
staying in the lane at all times. The system will not work if there are no recognisable lane markings. The camera vision can
be reduced by rain, snow, heavy spray or oncoming lights. This and vehicles in front of you can lead to the lane markings
not being recognised by the Lane Assist system. The Lane Assist system does not activate at a vehicle speed of less than
65km/h.
28Glossary
Glossary
*Optional equipment for specific models. ^Only available on selected models