Driving and operating185depending on the vehicle equipment,
either the radar behind the radiator
grille or the front camera in the
windscreen to detect the distance of
a vehicle directly ahead in your lane.
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 3 116.
Press MENU on the turn signal lever
to select Vehicle Information
Menu ? and turn the adjuster
wheel to choose following distance
indication page.
The minimum indicated distance is
0.5 s.
If there is no vehicle ahead or the vehicle ahead is out of range, two
dashes will be displayed: -.- s.
If Adaptive cruise control is active,
this page shows the alert sensitivity
setting instead of following distance setting. 3 175.
Active Emergency Braking
Active emergency braking can help to reduce the damage and injury from
crashes with vehicles 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 3 181.
The feature uses various inputs (e.g.
radar sensor, brake pressure, vehicle speed) to calculate the probability of
a frontal collision.
Active emergency braking operates automatically above walking speed,
provided that Auto collision
preparation setting is not deactivated
in the vehicle personalisation menu
3 124.
The system includes: ● brake preparation system
● emergency automatic braking
● forward looking brake assist9Warning
This system is not intended to
replace the driver responsibility of driving the vehicle and looking
ahead. Its function is limited to
supplemental use only. The driver shall continue to apply the brake
pedal as the driving situation
dictates.
186Driving and operatingBrake preparation system
When approaching a vehicle ahead
so quickly that a collision is likely, the
brake preparation system slightly
pressurises 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.
Emergency automatic braking
After the brake preparation and just
before the imminent collision, this
function automatically applies limited
braking to reduce the impact speed of the collision.
Forward looking brake assist
In addition to brake preparation
system and emergency automatic braking, the forward looking brake
assist function makes the brake assist more sensitive. In this way,
depressing the brake pedal slightly
results immediately in a strong
braking. This function helps the driver brake quicker and stronger before the
imminent collision.9 Warning
Active emergency braking is not
designed to apply strong
autonomous braking or to avoid automatically a collision. It is
designed to reduce the vehicle
speed before collision. It may not
react on stopped vehicles,
pedestrians or 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 shall 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.
System limitations
The active emergency braking has
limited or no function during rain,
snow or heavy dirt, as the radar
sensor can be covered by a water
film, dust, ice or snow. In case of
sensor blockage, clean the sensor
cover.
In some seldom cases the active
emergency braking system may
provide a short automatic braking in
situations that seem to be
unnecessary, for instance due to
traffic signs in a curve or due to
vehicles in another lane. This is
acceptable operation, the vehicle
does not need service. Firmly apply
the accelerator pedal to override the
automatic braking.
Settings
Settings can be changed in the
vehicle personalisation menu in the
Info-Display.
Select the relevant setting in
Settings in the Info-Display.
Vehicle personalisation 3 124.
Fault
In the event of a system service
requirement, a message is displayed
in the Driver Information Centre.
192Driving and operatingDue to the high position of the
camera, the rear bumper can be seen on the display as a guide to position.
The area displayed by the camera is
limited. The distance of the image that
appears on the display differs from
the actual distance.
Guiding lines
Dynamic guiding lines are horizontal
lines at one metre intervals projected
on the picture to define the distance
to displayed objects.
Trajectory lane of the vehicle is
shown in accordance with the
steering angle.
Warning symbols
Warning symbols are indicated as
triangles 9 on the picture which
shows obstacles detected by the rear
sensors of the parking assist.
Additionally 9 appears on the top line
of the Info-Display with the warning to
check the vehicle surrounding.
Deactivation
The camera is switched off when a
certain forward speed is exceeded or
if reverse gear is not engaged for
approx. 15 seconds. Rear view
camera can be manually deactivated
in the vehicle personalisation menu in the Info-Display. Select the relevant
setting in Settings .
Vehicle personalisation 3 124.Deactivation of guiding lines and
warning symbols
7'' R 4.0 IntelliLink Activation or
deactivation of the visual guiding lines and the warning symbols can be
changed via touch buttons in the
lower zone of the display.
7'' Navi 950 Activation or deactivation
of the visual guiding lines and the
warning symbols can be changed in
the Settings menu in the
Info-Display. Select the relevant
setting in Settings, I Vehicle .
Info-Display 3 121.
Vehicle personalisation 3 124.
196Driving and operatingReasons for signs being cleared:● A predefined distance was driven
or time has elapsed (differs for
each sign type)
● Vehicle drives through a turn
● The speed becomes slower than 32 mph (city entry detection)
Fault
The traffic sign assistant system may not operate correctly if:
● The area of the windscreen, where the front camera is
located, is not clean or affected
by foreign items, e.g. stickers.
● Traffic signs are completely or partially covered or difficult to
discern.
● There are adverse environmental
conditions, e.g. heavy rain, snow,direct sunlight or shadows.
● Traffic signs are incorrectly mounted or damaged.
● Traffic signs do not comply with the Vienna Convention on traffic
signs (Wiener Übereinkommen
über Straßenverkehrszeichen).Caution
The system is intended to help the driver within a defined speed
range to discern certain traffic
signs. Do not ignore traffic signs
which are not displayed by the
system.
The system does not discern any other than the conventional traffic
signs that might give or end a
speed limit.
Do not let this special feature
tempt you into taking risks when
driving.
Always adapt speed to the road
conditions.
The driver assistance systems do not relieve the driver from full
responsibility for vehicle
operation.
Lane departure warning
The lane departure warning system
observes the lane markings between
which the vehicle is driving via a front camera. The system detects lane
changes and warns the driver in the
event of an unintended lane change
via visual and acoustic signals.
Criteria for the detection of an
unintended lane change are:
● No operation of turn signals.
● No brake pedal operation.
● No active accelerator operation or speeding-up.
● No active steering.
If the driver is active, no warning will
be issued.
Activation
234Vehicle careNo.Circuit1–2Trailer outlet3Parking assist4Selective catalytic reduction
system5–6–7Power seat8–9Selective catalytic reduction
system10Nitrogen oxide sensor11Trailer module/Trailer socket12Trailer module13Trailer outlet14–15–No.Circuit16Interior mirror/Rear view
camera17Power outlet18–19Steering wheel heating20Sunblind21Heated front seats22–23–24Selective catalytic reduction
system25–26–27–28–29–30–No.Circuit31–32Active damping system/Lane
departure warning
286GGauges ....................................... 103
Gear shifting ............................... 113
General information ...................207
Glass panel .................................. 33
Glovebox ..................................... 65
H Halogen headlights ....................221
Hand brake ................................. 165
Hazard warning flashers ............136
Headlight flash ........................... 133
Headlight range adjustment ......133
Headlights................................... 131 Headlights when driving abroad 134
Head restraint adjustment .............8
Head restraints ............................ 35
Heated mirrors ............................. 29
Heated rear window ..................... 33
Heated steering wheel .................96
Heating ........................................ 42
Heating and ventilation system . 141
High beam ......................... 115, 132
High beam assist ................115, 132
Hill start assist ........................... 167
Horn ....................................... 13, 97
I
Identification plate .....................261
Ignition switch positions .............150
Immobiliser .......................... 28, 115Indicators.................................... 103
Info display ................................. 121
Information displays.................... 116
Instrument cluster ......................103
Instrument panel fuse box .........232
Instrument panel illumination .....228
Instrument panel illumination control .................................... 138
Instrument panel overview ........... 10
Interactive driving system ...........170
Interior care ............................... 255
Interior lighting ............................ 138
Interior lights ...................... 138, 228
Interior mirrors .............................. 29
Interruption of power supply ......163
Introduction .................................... 3
J
Jump starting ............................. 250
K Keys ............................................. 19
Keys, locks ................................... 19
L Lane departure warning .....113, 196
Lashing eyes ............................... 87
LED headlights ...........115, 135, 223
Lighting features .........................139
Light switch ................................ 131
Load compartment ................24, 78Load compartment cover .............80
Load compartment fuse box ......233
Loading information .....................93
Load rails and hooks ...................87
Low fuel ..................................... 115
M Malfunction indicator light ..........111
Manual anti-dazzle ......................29
Manual mode ............................. 162
Manual seat adjustment ...............38
Manual transmission .................. 164
Manual windows ..........................30
Memorised settings ......................21
Mirror adjustment ........................... 8
Misted light covers .....................137
N
New vehicle running-in ..............150
Number plate light .....................227
O Object detection systems ...........187
Odometer ................................... 103
Oil, engine .................. 215, 258, 263
OnStar ........................................ 127
Operate pedal ............................. 112
Outside temperature ....................99
Overhead console .......................67
Overrun cut-off ........................... 152
288Traction Control system off......... 113
Traffic sign assistant ...........116, 193
Trailer coupling ........................... 207
Trailer stability assist .................211
Trailer towing ............................. 208
Transmission ............................... 15
Transmission display .................161
Tread depth ............................... 240
Trip odometer ............................ 103
Turn and lane-change signals ...136
Turn signal ................................. 109
Tyre chains ................................ 241
Tyre designations ......................235
Tyre pressure ............................ 236
Tyre pressure monitoring system ............................. 114, 237
Tyre pressures ........................... 273
Tyre repair kit ............................. 241
U
Ultrasonic parking assist............. 187
Underseat storage .......................67
Upholstery .................................. 255
Using this manual ..........................3
V Vehicle battery ........................... 218
Vehicle checks............................ 214
Vehicle data ................................ 263
Vehicle data recording and privacy ..................................... 281Vehicle detected ahead..............116
Vehicle dimensions .................... 270
Vehicle Identification Number ....261
Vehicle jack ................................ 235
Vehicle messages .....................122
Vehicle personalisation .............124
Vehicle security ............................ 25
Vehicle specific data ......................3
Vehicle storage ........................... 213
Vehicle tools ............................... 235
Vehicle unlocking ........................... 6
Vehicle weight ........................... 269
Ventilation ................................... 141
W
Warning chimes .........................123
Warning lights ............................. 103
Warning triangle .......................... 91
Washer and wiper systems .........13
Washer fluid ............................... 218
Wheel changing .........................244
Wheel covers ............................. 241
Wheels and tyres .......................235
Windows ....................................... 30
Windscreen................................... 30
Windscreen wiper/washer ...........97
Winter tyres ............................... 235
Wiper blade replacement ..........220