Driving and operating183
Do not use the cruise control if it is notadvisable to maintain a constant
speed.
Illustrations show different versions.
Control indicator m 3 114.
Switching on
Press m; control indicator m in
instrument cluster illuminates white.
Activation
Accelerate to the desired speed and
turn thumb wheel to SET/-, the
current speed is stored and
maintained. Control indicator m in
instrument cluster illuminates green.
On Uplevel display m illuminates
green and set speed is indicated.
Accelerator pedal can be released.
Vehicle speed can be increased by depressing the accelerator pedal.
When the accelerator pedal is
released, the previously stored speed
is resumed.
Cruise control remains activated
while gearshifting.
Increase speed With cruise control active, hold thumb
wheel turned to RES/+ or briefly turn
to RES/+ repeatedly: speed
increases continuously or in small
increments.
Alternatively accelerate to the desired speed and store by turning to SET/-.
184Driving and operatingReduce speed
With cruise control active, hold thumb
wheel turned to SET/- or briefly turn to
SET/- repeatedly: speed decreases
continuously or in small increments.
Deactivation
Press y; control indicator m in
instrument cluster illuminates white.
On Uplevel display m changes to
white.
Cruise control is deactivated, but not
switched off. Last stored speed
remains in memory for later speed
resume.
Automatic deactivation: ● Vehicle speed is below approx. 30 km/h.
● Vehicle speed drops more than 25 km/h below the set speed.
● The brake pedal is depressed.
● The clutch pedal is depressed for
a few seconds.
● The selector lever is in N.
● Engine speed is in a very low range.● The Traction Control system orElectronic Stability Control is
operating.
● Parking brake is applied.
● Simultaneous pressing RES/+
and brake pedal deactivates
cruise control and will delete
stored speed.
Resume stored speed
Turn thumb wheel to RES/+ at a
speed above 30 km/h. The stored
speed will be obtained.
Switching off
Press m, control indicator m in
instrument cluster extinguishes. The
stored speed is deleted.
Pressing L to activate the speed
limiter or switching off the ignition also switches off cruise control and
deletes the stored speed.
Speed limiter
The speed limiter prevents the
vehicle exceeding a preset maximum
speed.The maximum speed can be set at
speeds above 25 km/h up to
200 km/h.
The driver can only accelerate up to
the preset speed. Deviations from the limited speed may occur when driving
downhill.
The preset speed limit is displayed in
the Driver Information Centre when
the system is active.
Activation
Illustrations show different versions.
194Driving and operatingA precondition is that forward collision
alert with front camera system is not
deactivated by pressing V on the
steering wheel or, with radar sensor,
that it is not deactivated in the vehicle
personalisation menu 3 125.
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.
The control indicator A changes to
yellow when the distance to a
preceding moving vehicle gets too
small or when approaching another
vehicle too rapidly.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 which is projected on the
windscreen in the driver's field of
view.
Simultaneously a warning chime sounds. Depress the brake pedal and
steer the vehicle, if it is required by the
situation.
Selecting the alert sensitivity Press V or E to set the alert
sensitivity to near, medium or far and
on some versions off.
216Driving and operatingActivation
The lane keep assist is activated by
pressing a. The LED in the button
illuminates to indicate that the system
is switched on.
When the control indicator a in the
instrument cluster illuminates green,
the system is ready to assist.
The system is operational at vehicle
speeds between 60 km/h and
180 km/h and if lane markings are
available.
The system gently turns the steering
wheel and the control indicator a
changes to yellow, if the vehicle
approaches a detected lane marking
without using the turn signal in that
direction.
The system alerts by flashing a
together with three chimes, from the
respective direction, if the lane is
departed significantly.
The system is only operable when a
lane marking is detected.
If the system only detects lane
markings on one side of the road, it
will only assist for this side.
Lane keep assist detects hands-free
driving. In this case a message in the
Driver Information Centre pops-up
and a chime sounds as long as lane
keep assist detects hands-free
driving.Deactivation
The system is deactivated by
pressing a; the LED in the button
extinguishes.
Fault
The system performance may be
affected by:
● Windscreen not clean or affected
by foreign items, e.g. stickers
● Close vehicles ahead
● Banked roads
● Winding or hilly roads
● Road edges
● Roads with poor lane markings
● Sudden lighting changes
● Adverse environmental conditions e.g. heavy rain or
snow
● Vehicle modifications, e.g. tyres.
Switch off the system if the system is
disturbed by tar marks, shadows, road cracks, temporary or
construction lane markings, or other
road imperfections.
248Vehicle careNo.Circuit33Anti theft warning34Horn35Power outlet load compartment36Right high beam (Halogen)/
Right low beam (LED)37Left high beam (Halogen)38LED headlight/Automatic head‐
light range adjustment39Front fog light40OnStar41Water in fuel sensor/Water
pump42Manual headlight range adjust‐
ment43Fuel pump44Rear view camera/Inside rear
view mirror/Trailer module45LED headlight left/Automatic
headlight range adjustment leftNo.Circuit46Instrument cluster47Steering column lock48Rear wiper49–50LED headlight right/Automatic
headlight range adjustment
right51Left low beam (LED)52Engine control module/Trans‐
mission control module53–54Windscreen wiper55Diesel exhaust system56–57–
After having changed defective fuses,
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunction may occur.
Instrument panel fuse box
The fuse box is located behind a
cover.
Pull the cover and remove.
Vehicles with power connector:
If the fuse cover has a power
connector, it must be removed by
using an adapter and a screwdriver.
The adapter is stowed in the glovebox 3 71 . The screwdriver is stowed in the
load compartment 3 252.
250Vehicle careNo.Circuit17Body control module18Body control module19Data link connector20Airbag system21Climate control system22Central locking system, tailgate23Electronic key system24Power seat memory function25Airbag system steering wheel26Ignition switch/Steering column
lock27Body control module28USB socket29–30Selector lever31Rear window wiper32Transmission control moduleNo.Circuit33Anti-theft alarm system/Power
sounder34Parking assist/Side blind spot
alert/Infotainment system/USB
socket35OnStar36Info display/Instrument cluster/ CD player37Infotainment system, radio
After having changed defective fuses,
close the fuse box cover and press
until it engages.
Vehicles with power connector: 1. Apply the cover on the right side.
2. Fold the left side of the cover forwards. Take care that the
securing clamp is guided as
shown in the illustration.
Load compartment fuse box
The fuse box is located on the left side
of the load compartment behind a
cover.
Vehicle care275Clean the leather upholstery with
clear water and a soft cloth. In case of
heavy soiling, use leather care.
The instrument cluster and the
displays should only be cleaned using
a soft damp cloth. If necessary use a
weak soap solution.
Clean fabric upholstery with a
vacuum cleaner and brush. Remove
stains with an upholstery cleaner.
Clothing fabrics may not be
colourfast. This could cause visible
discolourations, especially on light- coloured upholstery. Removable
stains and discolourations should be
cleaned as soon as possible.
Clean seat belts with lukewarm water or interior cleaner.Caution
Close Velcro fasteners as open
Velcro fasteners on clothing could damage seat upholstery.
The same applies to clothing with
sharp-edged objects, like zips or
belts or studded jeans.
Plastic and rubber parts
Plastic and rubber parts can be
cleaned with the same cleaner as
used to clean the body. Use interior cleaner if necessary. Do not use any
other agent. Avoid solvents and petrol in particular. Do not use high-
pressure jet cleaners.
308Headlight range adjustment ......137
Headlights................................... 136
Headlights when driving abroad 138
Head restraint adjustment .............8
Head restraints ............................ 46
Heated mirrors ............................. 40
Heated rear window ..................... 43
Heated steering wheel .................92
Heating .................................. 54, 56
Heating and ventilation system . 147
High beam ......................... 114, 137
High beam assist ........................114
Hill start assist ........................... 179
Horn ....................................... 14, 92
I
Identification plate .....................280
Ignition switch positions .............158
Immobiliser .......................... 38, 114
Indicators .................................... 104
Info display ................................. 121
Information displays.................... 115
Instrument cluster ......................101
Instrument panel fuse box .........248
Instrument panel illumination .....245
Instrument panel illumination control .................................... 144
Instrument panel overview ........... 10
Interior care ............................... 274
Interior lighting ............................ 144Interior lights ...................... 144, 245
Interior mirrors .............................. 40
Interruption of power supply ......172
Introduction .................................... 3
J
Jump starting ............................. 269
K Key, memorised settings ..............24
Keys ............................................. 20
Keys, locks ................................... 20
L Lane keep assist ................112, 215
Lashing eyes ............................... 81
LED headlights ...................114, 138
Lighting features .........................145
Light switch ................................ 136
Load compartment ................30, 73
Load compartment cover .............79
Load compartment fuse box ......250
Loading information .....................88
Low fuel ..................................... 113
M
Malfunction indicator light ..........111
Manual anti-dazzle ......................40
Manual mode .....................171, 175
Manual seat adjustment ...............48
Manual transmission .................. 173Manual transmission automated 173
Manual windows ..........................41
Massage ....................................... 55
Maximum speed ......................... 254
Memorised settings ......................24
Midlevel display .......................... 115
Mirror adjustment ........................... 9
Misted light covers .....................143
N Natural gas ......................... 106, 219
New vehicle running-in ..............158
Number plate light .....................244
O Object detection systems ...........200
Odometer ................................... 105
Oil, engine .......................... 277, 282
OnStar ........................................ 131
Outside temperature ....................95
Overrun cut-off ........................... 163
P Parking ................................ 19, 166
Parking assist ............................ 200
Parking brake ............................ 177
Parking lights ............................. 143
Particulate filter ........................... 168
Performance .............................. 287
Performing work ........................229
Pollen filter ................................. 156