172Driving and operatingSelecting the alert sensitivity
7'' Colour Info Display: Adjust the alert
sensitivity in the vehicle
personalisation 3 107.
8'' Colour Info Display: Adjust the alert
sensitivity in the settings of the active safety brake in the vehicle
personalisation 3 107.
The chosen setting will remain until it is changed. The alert timing will vary
based on vehicle speed. The faster
the vehicle speed, the farther away
the alert will occur. Consider traffic
and weather conditions when
selecting the alert timing.
Deactivation The system can only be deactivated
by deactivating the active emergency
braking in the vehicle personalisation
3 107.
System limitations
Forward collision alert is designed to
warn on vehicles only, but may react also to other objects.In the following cases, forward
collision alert may not detect a vehicle ahead or sensor performance is
limited:
● driving on winding or hilly roads● driving during nighttime
● weather limits visibility, such as fog, rain, or snow
● the sensor in the windscreen or the radar unit behind the front
bumper are blocked by snow, ice,
slush, mud, dirt etc.
● the windscreen is damaged or affected by foreign objects, e.g.
stickers
Active emergency braking Active emergency braking can help to
reduce the damage and injury from
crashes with vehicles, pedestrians and obstacles directly ahead, when a collision can no longer be avoided
either by manual braking or by
steering. Before the active
emergency braking applies, the driver
is warned by the forward collision
alert or the front pedestrian protection
alert.Forward collision alert 3 170
Front pedestrian protection 3 175
Active emergency braking can be
deactivated in the personalisation
menu 3 107. If deactivated, m
illuminates in the instrument cluster and a warning message is displayed
in the Driver Information Centre.
The feature uses various inputs (e.g.
camera sensor, radar sensor, brake
pressure, vehicle speed) to calculate
the probability of a frontal collision.9 Warning
This system is not intended to
replace the driver responsibility for driving the vehicle and looking
ahead. Its function is limited to
supplemental use only to reduce
the vehicle speed before a
collision.
The system may not react to
animals. After a sudden lane
change, the system needs a
certain time to detect the next
preceding vehicle.
Driving and operating173The driver must always be ready
to take action and apply the brakes
and steer to avoid collisions.
Functionality
If equipped only with front camera the
active emergency braking operates in
forward gear in the range between
3 mph and 53 mph. With radar sensor
and front camera active emergency
braking operates in forward gear in the range between 3 mph and87 mph.
A precondition is that forward collision alert with front camera system is not
deactivated in the vehicle
personalisation menu and the seat
belts of the front passengers are
fastened 3 107.
The system includes: ● brake preparation system
● emergency automatic braking ● forward looking brake assist
● intelligent brake assist (only with radar sensor)
● forward collision alert
● front pedestrian protection
Brake preparation system
When approaching a vehicle ahead
or a pedestrian so quickly that a
collision is likely, the brake
preparation system slightly
pressurises the brakes. This reduces
the response time, when braking is
requested.
Emergency automatic braking
After activation of brake preparation
system and just before the imminent
collision, this function automatically
applies limited braking to reduce the
impact speed of the collision or
prohibit a crash. If active emergency
braking is applied, m flashes in the
instrument cluster. Depending on the
situation, the vehicle may
automatically brake moderately or
hard. Front automatic braking can
only occur if a vehicle ahead is
detected. On vehicles with front
pedestrian protection, front automatic
braking can also occur when a
pedestrian ahead is detected.
Forward collision alert 3 170
Front pedestrian protection 3 175Emergency automatic braking may
slow the vehicle to a complete stop to try to avoid a potential crash. If this
happens, emergency automatic
braking may engage the electric
parking brake to hold the vehicle at a
stop. To release press the electric
parking brake button or firmly press
the accelerator pedal.9 Warning
Emergency automatic braking is
an emergency crash preparation
feature and is not designed to
avoid crashes. Do not rely on the
system to brake the vehicle.
Emergency automatic braking will
not brake outside of its operating speed range and only responds to
detected vehicles and
pedestrians.
Forward looking brake assist
In addition to the brake preparation
system and emergency automatic
braking, the forward looking brake
assist function makes the brake assist more sensitive. Therefore, pressing
174Driving and operatingthe brake pedal less strongly results
in immediate hard braking. This
function helps the driver brake
quicker and harder before the
imminent collision.9 Warning
Active emergency braking is not
designed to apply hard
autonomous braking or to
automatically avoid a collision. It is
designed to reduce the vehicle
speed before a collision. It may not
react to animals. After a sudden
lane change, the system needs a
certain time to detect the next
preceding vehicle.
The complete attention of the
driver is always required while
driving. The driver must always be
ready to take action and apply the brakes and steer to avoid
collisions.
The system is designed to work with
all occupants wearing their seat belts.
Intelligent brake assist
If the vehicle is equipped with radar
sensor, intelligent brake assist may
be available. Intelligent brake assist
provides a boost to braking when the
brake pedal is quickly applied. The
braking is based on the speed of
approach and distance to a vehicle
ahead.
Minor brake pedal pulsations or pedal movement during this time is normal
and the brake pedal should continue to be applied as needed. Intelligent
brake assist will automatically
disengage only when the brake pedal is released.9 Warning
Intelligent brake assist may
increase vehicle braking in
situations when it may not be
necessary. You could block the
flow of traffic. If this occurs, take
your foot off the brake pedal and
then apply the brakes as needed.
Forward collision alert 3 170.
Front pedestrian protection 3 175.
System limitations
In some cases, the active emergencybraking system may provide an
automatic braking in situations that
seem to be unnecessary, for instance
in parking garages, due to traffic signs in a curve or due to vehicles in
another lane. This is normal
operation, the vehicle does not need service. Firmly apply the accelerator
pedal to override the automatic
braking if the situation and the
surroundings permit.
In the following cases, active
emergency braking performance is limited:
● driving on winding or hilly roads
● detecting all vehicles, especially vehicles with a trailer, tractors,
muddy vehicles, etc.
● weather limits visibility, such as fog, rain, or snow
● driving during nighttime
Driving and operating175● the sensor in the windscreen orthe radar unit behind the front
bumper are blocked by snow, ice, slush, mud, dirt etc.
● the windscreen is damaged or affected by foreign objects, e.g.
stickers
Complete attention is always required
while driving, and you should be
ready to take action and apply the
brakes and / or steer the vehicle to
avoid crashes.
We recommend to deactivate the
system in the vehicle personalisation
in the following cases:
● when towing a trailer or caravan
● when carrying long objects on roof bars or a roof rack
● when the vehicle is being towed with the engine running
● when a spare wheel is fitted that is smaller than the other wheels
● before using an automatic car wash with the engine running
● before placing the vehicle on a rolling road in a workshop● if the windscreen has beendamaged close to the camera
● if the front bumper has been damaged
● if the brake lights are not working
Fault
In case the system requires a service, a message is displayed in the Driver
Information Centre.
If the system does not work as it
should do, vehicle messages are
displayed in the Driver Information
Centre.
Vehicle messages 3 106.
Front pedestrian protection
Front pedestrian protection may help
to avoid or reduce the harm caused
by front-end crashes with pedestrians when driving forward.
The system uses the front camera in
the windscreen and a radar unit in the
front bumper to detect a pedestrian
directly ahead in your path.Front pedestrian protection can
detect and alert to pedestrians in a
forward gear at speeds between
3 mph and 37 mph. Additionally front
pedestrian protection can provide a
boost to braking or automatically
brake the vehicle.
During nighttime driving, system
performance is limited.9 Danger
Front pedestrian braking does not
provide an alert or automatically
brake the vehicle, unless it detects
a pedestrian.
The system may not detect
pedestrians, including children,
when the pedestrian is not directly ahead, not fully visible, not
standing upright, or when part of a
group.
Front pedestrian protection includes:
● detecting front pedestrian ahead● front pedestrian alert
Front pedestrian protection is
activated together with forward
collision alert.
228Vehicle careNo.Circuit10Central locking system11Central locking system13Anti-theft alarm system16Electrical power steering wheel18BTA module21Interior lights22Glovebox light23Blind spot alert system / Exteriormirror adjustment / Inductive
charging24Column electrical assembly25Interior mirror26Seat belt reminder27Camera / Rain sensor / Auto‐
matic light control28USB / Infotainment31AirbagNo.Circuit33Power outlet front36InfotainmentNo.Circuit1Interior mirror / Electrical power
steering wheel / Selective ride
control / Radar / Diesel exhaust
system3Trailer provisions control
module4HornNo.Circuit5Windscreen washer6Windscreen washer7Power outlet rear10Doors lock / Tailgate lock11Doors lock / Tailgate lock12Stop-start system / Diagnostic
connector module / Brake
system13Infotainment / Climate control
system14Alarm siren15Climate control system16Stop-start system / Brake
system17Instrument cluster19Column electrical assembly /
Steering wheel controls21Anti-theft alarm system
279Outside temperature ....................83
Overrun cut-off ........................... 138
P Panoramic view system ..............185
Parking ................................ 19, 140
Parking assist ............................ 176
Parking brake ............................ 153
Parking heater ............................ 130
Parking lights ............................. 119
Particulate filter ........................... 141
Pedestrian safety alert ..................80
Performance .............................. 263
Performing work ........................213
Power button .............................. 135
Power indicator gauge ..................90
Power outlets ............................... 84
Power seat adjustment ................48
Power windows ............................ 39
Preheating ................................... 97
Programmable charging .............197
Puncture ..................................... 239
Q
Quickheat ................................... 130
R Radio Frequency Identification (RFID) ..................................... 274
Radio remote control ...................21
Rain sensor .................................. 99REACH....................................... 270
Reading lights ............................ 120
Rear floor storage cover ..............72
Rear fog light ...............99, 118, 221
Rear seats .................................... 51
Rear view camera ...................... 188
Rear window wiper and washer ..82
Recommended fluids and lubricants ........................ 254, 258
Refuelling ................................... 203
Regenerative braking .................155
Registered trademarks ...............270
Reversing lights .........................119
Ride control systems ..................156
Roadside assistance ..................110
Roller blinds ................................. 42
Roof .............................................. 42
Roof load ...................................... 76
Roof rack ..................................... 75
S Safety net .................................... 73
Seat adjustment ............................. 7
Seat belt ........................................ 8
Seat belt reminder .......................93
Seat belts ..................................... 51
Seat heating ................................. 50
Seat heating, rear .....................51
Seat position ................................ 45
Selective catalytic reduction .......142Selective ride control ..................157
Selector lever.............................. 147
Service ............................... 132, 250
Service display ............................ 91
Service information ....................250
Service vehicle soon .................... 94
Side airbag system ......................58
Side blind spot alert ..............99, 184
Sidelights .................................... 112
Side turn lights ........................... 224
Software update ......................... 270
SOS ............................................ 110
Spare wheel ............................... 239
Speed limiter....................... 100, 162
Speedometer ............................... 89
Sport mode ................................ 158
Starting and operating ................134
Starting off ................................... 17
Starting the engine ....................136
Steering ...................................... 134
Steering wheel adjustment ......9, 79
Steering wheel controls ...............79
Stop engine .................................. 94
Stop-start system........................ 138
Storage ......................................... 68
Storage compartments .................68
Sunvisor lights ........................... 120
Sun visors .................................... 42
Symbols ......................................... 4
System check ............................... 95