Driving and operating199a much slower vehicle or after a lane
change. This is particularly true while
driving fast or if the visibility is
reduced due to weather conditions.
While entering or exiting a motorway,
adaptive cruise control may lose the
vehicle ahead and accelerate up to
the set speed. For this reason,
decrease the set speed before the
exit or before the entry.
Vehicle path changes
If another vehicle enters your driving
path, adaptive cruise control will first
consider the vehicle when it is
completely in your path. Be ready to
take action and depress the brake
pedal, if you need to brake more
quickly.
Hill and trailer considerations9 Warning
Do not use adaptive cruise control
on steep hill roads.
System performance on hills depends
on vehicle speed, vehicle load, traffic
conditions and the road gradient. It
may not detect a vehicle in your path
while driving on hills. Full speed range
adaptive control is deactivated
automatically, as the vehicle is
stopping uphill on an incline greater than 10%. In this condition, be
prepared to take control of the
vehicle.
Note that applying the brake
deactivates the system.
Radar unit
The radar unit is mounted behind the
radiator grille behind or below the
brand emblem.
9 Warning
The radar unit was aligned
carefully during manufacture.
Therefore, in the event of a front-
end impact, do not use the system. The front bumper may appear to
be intact, however the sensor
behind can be out of position and
react incorrectly. After an
200Driving and operatingaccident, consult a workshop to
verify and adjust the radar unit
position.
Settings
Settings can be changed in the
vehicle personalisation menu in the
Info-Display.
Select the relevant setting in Settings,
I Vehicle in the Info-Display.
Info-Display 3 121.
Vehicle personalisation 3 127.
Fault
If the adaptive cruise control does not
work due to temporary conditions
(e.g. blockage by ice, overheated
brakes or low speed manoeuvres) or
if there is a permanent system error,
a message is displayed in the Driver
Information Centre.
Vehicle messages 3 125.
Forward collision alert The forward collision alert may help toavoid or reduce the harm caused by
front-end crashes.
If the vehicle is equipped with
conventional cruise control, the
forward collision alert uses the front
camera in the windscreen to detect a
vehicle directly ahead, in your path.
If the vehicle is equipped with
adaptive cruise control, the forward
collision alert uses the radar sensor
and front camera to detect a vehicle
directly ahead, in your path.
A vehicle ahead is indicated by the
control indicator A.
If a vehicle directly ahead is
approached too quickly, a warning
chime and alert in the Driver
Information Centre is provided.
Additionally the driver gets notified by
a flashing red LED stripe or a pop up
symbol in the head-up display which
is projected on the windscreen in the
driver's field of view.
A precondition is that forward collision
alert in the vehicle personalisation
menu is not deactivated 3 127.
Activation
Forward collision alert with front
camera detects vehicles to distances
of approximately 60 metres and
operates automatically at all speeds
above walking speed.
Forward collision alert with radar
sensor detects vehicles to distances
of approximately 150 metres and
operates automatically at all speeds
above walking speed.
Alerting the driver The vehicle ahead control indicator
A illuminates green in the instrument
cluster when the system has detected
a vehicle in the driving path. On
vehicles with head-up display, A is
projected on the windscreen.
The control indicator A changes to
yellow when the distance to a
preceding moving vehicle gets too
small.
202Driving and operating
Note that the alert timing sensitivity
setting is shared with the following distance setting of the adaptive cruise control. So changing the alert timing
sensitivity changes the adaptive
cruise control following distance
setting.
Deactivation The system can be deactivated in the
personalisation menu, 3 127.
If the forward collision alert was
deactivated, alert sensitivity is set to
"medium" when ignition is switched on next time.
The last selected setting will be stored
when the ignition is switched off.
General information9 Warning
Forward collision alert is just a
warning system and does not
apply the brakes. When
approaching a vehicle ahead too
rapidly, it may not provide you
enough time to avoid a collision.
The driver accepts full
responsibility for the appropriate
following distance based on traffic, weather and visibility conditions.
The complete attention of the
driver is always required while
driving. The driver must always be
ready to take action and apply the
brakes.
System limitations
Forward collision alert is designed to warn on vehicles only, but may reactalso 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.● During nighttime driving.
● Weather limits visibility, such as fog, rain, or snow
● The sensor in the windscreen is blocked by snow, ice, slush, mud,dirt, windscreen damage or
affected by foreign items, e.g.
stickers.
Following distance
indication
The following distance indication
displays the distance to a preceding
moving vehicle. The front camera in
the windscreen is used to detect the
distance of a vehicle directly ahead in
the vehicle's path. It is active at
speeds above 40 km/h.
When a preceding vehicle is detected ahead, the distance is indicated inseconds, displayed on a page in the
Driver Information Centre.
Driving and operating203On Baselevel display, choose Info
Menu ? via MENU on the turn
signal lever and turn the adjuster
wheel to choose following distance
indication page, 3 114
On Mid- and Uplevel display, select
Info menu via steering wheel buttons
and press å to select following
distance indication 3 114.
The minimum indicated distance is 0.5 seconds.
If there is no vehicle ahead or the vehicle ahead is out of range, two
dashes will be displayed: -.- sec.
If Adaptive cruise control is active,
this page shows the alert sensitivity
setting instead of following distance
setting. 3 192.
System limitations In the following cases, following
distance indication sensor
performance is limited:
● Driving on winding or hilly roads.
● During nighttime driving.
● Weather limits visibility, such as fog, rain, or snow.
● The sensor is blocked by snow, ice, slush, mud, dirt, windscreen
damage or affected by foreign
items, e.g. stickers.
Active emergency braking Active emergency braking can help toreduce 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 3 200 or the Front pedestrian
protection alert 3 206.
The feature uses various inputs (e.g.
camera sensor, radar sensor, brake
pressure, vehicle speed) to calculate
the probability of a frontal collision.
Driving and operating207Front pedestrian protection can beset to Off, Alert, or Alert & Brake in
vehicle personalisation 3 127.9 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
● automatic braking
Detecting front pedestrian ahead
A pedestrian ahead up to a distance
of approximately 40 m is indicated by the control indicator 7 in the
instrument cluster. On vehicles with
head-up display, 7 is projected on the
windscreen.
Front pedestrian alert
When approaching a detected
pedestrian too quickly, a red flashing
LED alert or the pop-up symbol 7 in
the head-up display is projected on the windscreen in the driver's field of
view. A warning chime is provided.
The brake system may prepare for
driver braking to occur more rapidly
which can cause a brief, mild
deceleration. Continue to apply the
brake pedal as required.
Cruise control or Adaptive cruise
control may be disengaged when the
Front pedestrian alert occurs.
Automatic braking If a crash into a pedestrian directly
ahead is imminent, and the brakes
have not been applied, Automatic
braking may automatically brake
moderately or brake hard. This can
help to avoid some very low speed
pedestrian crashes or reduce
pedestrian injury.
Automatic braking levels may be reduced under certain conditions,
such as higher speeds.
322IndexAAccessories and vehicle modifications .......................... 239
Active bonnet ................................ 71
Active emergency braking ..........203
Adaptive cruise control .......113, 192
AdBlue ................................ 111, 172
Adjustable air vents ...................159
Airbag and belt tensioners .........108
Airbag deactivation ..............63, 108
Airbag label................................... 58
Airbag system .............................. 58
Air conditioning regular operation ................................ 161
Air conditioning system .............. 150
Air intake .................................... 160
Air vents...................................... 159
All-wheel drive ........................... 180
Antilock brake system ................ 180
Antilock brake system (ABS) .....110
Anti-theft alarm system ................34
Anti-theft locking system .............. 34
Appearance care ........................281
Armrest ................................... 53, 55
Armrest storage ........................... 74
Ashtrays ....................................... 97 Automatic anti-dazzle ..................39
Automatic dimming ......................38
Automatic light control ...............137
Automatic locking ........................27Automatic transmission .............175
Autostop ..................................... 167
Auxiliary heater ........................... 159
B Baselevel display ........................114
Battery discharge protection ......148
Battery voltage ........................... 126
Belts.............................................. 56 BlueInjection ............................... 172
Bonnet ....................................... 241
Brake and clutch fluid .................286
Brake and clutch system ...........109
Brake assist ............................... 182
Brake fluid .................................. 244
Brakes ............................... 180, 244
Breakdown.................................. 279
Bulb replacement ....................... 247
C Capacities .................................. 303
Cargo management system ........81
Catalytic converter .....................171
Central locking system ................25
Centre console lighting ..............147
Centre console storage ...............74
Changing tyre and wheel size ...268
Charging system ........................ 109
Child locks ................................... 28
Child restraint installation locations ................................... 67
323Child restraints.............................. 64
Child restraint systems ................64
Climate control ............................. 16
Clock............................................. 93
Collision damage repair ..............314
Control indicators........................ 107
Control of the vehicle .................163
Controls ........................................ 89
Convex shape .............................. 37
Coolant and antifreeze ...............286
Cruise control ....................113, 189
Cupholders .................................. 73
Curtain airbag system .................. 62
Curve lighting.............................. 140
D Danger, Warnings and Cautions ...4
Daytime running lights ...............140
Declaration of conformity ............310
DEF ............................................ 172
Diesel exhaust fluid ....................172
Diesel fuel system bleeding .......246
Diesel particle filter ....................170
Door open .................................. 113
Doors ............................................ 28
Driver assistance systems ..........189
Driver Information Centre ...........114
Driving characteristics and towing tips .............................. 235
Driving hints ................................ 163E
Electric adjustment ......................37
Electrical system......................... 257
Electric parking brake .........109, 181
Electric parking brake fault .........109
Electronic climate control system 153
Electronic key system ...................22
Electronic Stability Control.......... 185
Electronic Stability Control and Traction Control system ..........110
Electronic Stability Control off..... 110
End-of-life vehicle recovery .......240
Engine compartment fuse box ...258
Engine coolant ........................... 243
Engine coolant temperature ......111
Engine coolant temperature gauge ..................................... 106
Engine data ............................... 294
Engine exhaust .......................... 170
Engine identification ...................290
Engine oil ................... 242, 286, 291
Engine oil pressure ....................111
Entry lighting .............................. 147
Event data recorders ..................317
Exit lighting ................................ 147
Exterior care .............................. 281
Exterior light ............................... 112
Exterior lighting ....................13, 136
Exterior mirrors ............................. 37F
First aid kit ................................... 84
Fixed air vents ........................... 160
Fog light ..................................... 112
Fog lights ................................... 249
Folding mirrors ............................. 37
Following distance ......................110
Following distance indication ......202
Forward collision alert................. 200
Front airbag system .....................61
Front fog lights ........................... 144
Front pedestrian protection ........206
Front seats.................................... 47
Front storage ................................ 74
Fuel............................................. 231
Fuel for diesel engines ..............232
Fuel for petrol engines ...............231
Fuel gauge ................................. 105
Funnel......................................... 233
Fuses ......................................... 257
G Gauges ....................................... 103
Gear shifting ............................... 110
General information ...................235
Glovebox ..................................... 73
H Halogen headlights ....................247
Hand brake ................................. 180
Hazard warning flashers ............143