Driving and operating175Driving and
operatingDriving hints ............................... 176
Control of the vehicle ...............176
Steering ................................... 176
Starting and operating ...............176
New vehicle running-in ............176
Power button ........................... 177
Retained power off ..................178
Starting the engine ..................178
Overrun cut-off ........................ 180
Stop-start system ....................180
Parking .................................... 182
Engine exhaust .......................... 183
Exhaust filter ............................ 183
Catalytic converter ...................184
AdBlue ..................................... 185
Automatic transmission ..............187
Manual transmission ..................192
Drive systems ............................ 192
All-wheel drive ......................... 192
Brakes ........................................ 193
Antilock brake system .............193
Parking brake .......................... 194Brake assist............................. 195
Hill start assist ......................... 195
Ride control systems .................196
Traction Control system ..........196
Electronic Stability Control ......197
Interactive driving system ........199
Driver assistance systems .........201
Cruise control .......................... 201
Speed limiter ........................... 202
Adaptive cruise control ............204
Forward collision alert .............214
Following distance indication ...217
Active emergency braking .......218
Front pedestrian protection .....221
Parking assist .......................... 223
Side blind spot alert .................229
Lane change alert ....................231
Panoramic view system ...........232
Rear view camera ...................235
Rear cross traffic alert .............236
Traffic sign assistant ................238
Lane keep assist .....................242
Fuel ............................................ 244
Fuel for petrol engines .............244
Fuel for diesel engines ............246
Refuelling ................................ 246
Trailer hitch ................................ 248
General information .................248Driving characteristics and
towing tips .............................. 249
Trailer towing ........................... 249
Towing equipment ...................250
Trailer stability assist ...............251
208Driving and operating9Warning
The Driver accepts full
responsibility to drive with the
appropriate following distance
based on traffic, weather, visibility and regional regulation. Followingdistance must be adjusted or the
system switched off when required by the prevailing conditions.
Indication on Driver Assistance page
Adaptive cruise control in Sport
mode
On vehicles with Flex Ride driving
modes, the driver can slightly
increase the Adaptive cruise control
acceleration when Sport mode is
selected. This function can be
deactivated in the Flex Ride
visualisation menu 3 199
Detecting the vehicle ahead
The green illuminated vehicle ahead
control indicator A is displayed when
the system detects a vehicle in the driving path. The range of the sensors
is between 25 and 150 metres
depending on vehicle speed.
Forward collision alert 3 214.
If this symbol does not display, or
displays briefly, adaptive cruise
control will not respond to vehicles ahead.
214Driving and operatingA new speed limit from the navigationmay be taken over automatically after
a certain distance since the last
detected traffic sign or when entering
a new road segment, e.g. road exits
or round-abouts.
Forward collision alert
The forward collision alert is part of
the forward collision system 3 123. It
can help to avoid or reduce the harm
caused by front-end crashes.
A vehicle ahead is indicated by the
control indicator A.
Additionally, the status of the forward
collision alert is indicated on the
Driver Assistance page in the Driver
Information Center 3 111.
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 precondition is that forward collision
alert in the vehicle personalisation
menu is not deactivated 3 123.
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
amber when the distance to a
preceding moving vehicle gets too
small.Caution
The colour lighting of this control
indicator does not correspond to
local traffic laws on following
distance. The driver bears full
responsibility for maintaining safe
following distance according to
applicable traffic rules, weather
and road conditions etc. at all
times.
When the time to a potential collision
with a vehicle in front gets too small
and a collision is imminent, the
collision alert symbol pops-up in the
Driver Information Centre and the
driver gets notified by a flashing red
LED stripe or the pop-up symbol in
the head-up display which is
projected on the windscreen in the
driver's field of view.
216Driving 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.
Indication on Driver Assistance page
Deactivation
The system can be deactivated in the
personalisation menu, 3 123.
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.
Driving and operating217In 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 and the Radar sensor
are used to detect the distance of a
vehicle directly ahead in the vehicle's
path. It is active at speeds above
25 mph.When a preceding vehicle is detected
ahead, the distance is indicated in
seconds, displayed on a page in the
Driver Information Centre.
On Baselevel display, choose Info
Menu ? via MENU on the turn
signal lever and turn the adjuster wheel to choose following distance
indication page, 3 111
On Mid- and Uplevel display, select
Info menu via steering wheel buttons
and press å to select following
distance indication 3 111.
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. 3 204.
System limitations In the following cases, following
distance indication sensor
performance is limited:
● Driving on winding or hilly roads.● During nighttime driving.
218Driving and operating● Weather limits visibility, such asfog, 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 is part of
the forward collision system 3 123. It
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 3 214 or the Front pedestrian
protection alert 3 221.
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.
The 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 above walking speed up
to 53 mph.
With radar sensor active emergency
braking operates in forward gear
above walking speed at all speeds.
A precondition is that forward collision
alert with front camera system is not
deactivated in the vehicle
personalisation menu 3 123.
The system includes: ● brake preparation system
● emergency automatic braking ● forward looking brake assist
● intelligent brake assist (only with radar sensor)
● front pedestrian protection system
Brake preparation system
When approaching a vehicle ahead
or a pedestrian so quickly that a
collision is likely, the brake
preparation system slightly
pressurizes the brakes. This reduces
the response time, when a manual or automatic braking is requested.
The brake system is prepared so that braking can occur more rapidly.
If equipped only with front camera the
system operates up to a speed of 50
mph.
Driving and operating219Emergency automatic brakingAfter 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. Depending on the
situation, the vehicle may
automatically brake moderately or
hard. This front automatic braking can
only occur if a vehicle ahead is
detected, indicated by the vehicle
ahead indicator A 3 214 . On vehicles
with front pedestrian protection, front automatic braking can also occur
when a pedestrian ahead is detected,
indicated by the pedestrian ahead
indicator 7.
If equipped only with front camera the system operates up to a speed of 50
mph.
Below a speed of 25 mph the system
can apply full braking.
Emergency 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 electricparking 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
the brake pedal less strongly results
in immediate hard braking. This
function helps the driver brake
quicker and harder before the
imminent collision.
If equipped only with front camera the
system operates up to a speed of 53
mph.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
activate when the brake pedal is
337Central locking system ................24
Centre console lighting ..............141
Centre console storage ...............73
Changing tyre and wheel size ...281
Charging system ........................ 106
Child locks ................................... 27
Child restraint installation locations ................................... 66
Child restraints.............................. 63
Child restraint systems ................63
Climate control ............................. 15
Clock............................................. 91
Collision damage repair ..............328
Connected navigation .................156
Connecting a phone ...................161
Control elements ........................144
Control indicators........................ 104
Control of the vehicle .................176
Controls ........................................ 87
Convex shape .............................. 36
Coolant and antifreeze ...............300
Cruise control ....................110, 201
Cupholders .................................. 72
Curtain airbag system .................. 61
Curve lighting.............................. 134
D
DAB announcements .................152
DAB-DAB linking ........................152
DAB-FM linking........................... 152Danger, Warnings and Cautions ...4
Daytime running lights ...............134
Declaration of conformity ............324
DEF ............................................ 185
Diesel exhaust fluid ....................185
Diesel fuel system bleeding .......259
Display operation ........................148
Door open .................................. 110
Doors ............................................ 28
Driver assistance systems ..........201
Driver Information Centre ...........111
Driving characteristics and towing tips .............................. 249
Driving hints ................................ 176
E
Electric adjustment ......................36
Electrical system......................... 270
Electric parking brake .........106, 194
Electric parking brake fault .........106
Electronic climate control system 166
Electronic key system ...................21
Electronic Stability Control.......... 197
Electronic Stability Control and Traction Control system ..........107
Electronic Stability Control off..... 107
End-of-life vehicle recovery .......253
Engine compartment fuse box ...271
Engine coolant ........................... 256
Engine coolant temperature ......108Engine coolant temperature
gauge ..................................... 103
Engine data ............................... 307
Engine exhaust .......................... 183
Engine identification ...................303
Engine oil ................... 255, 300, 304
Engine oil pressure ....................108
Entry lighting .............................. 141
Event data recorders ..................331
Exhaust filter ............................... 183
Exit lighting ................................ 141
Extended status view .................144
Exterior care .............................. 295
Exterior light ............................... 109
Exterior lighting ....................12, 131
Exterior mirrors ............................. 36
F
First aid kit ................................... 83
Fixed air vents ........................... 173
Folding mirrors ............................. 37
Following distance ......................107
Following distance indication ......217
Forward collision alert................. 214
Front airbag system .....................60
Front fog lights ...........109, 138, 262
Front pedestrian protection ........221
Front seats.................................... 46
Front storage ................................ 73
Fuel............................................. 244