Driving and operating167The vehicle must be parked on a level
surface.
The filler neck for AdBlue is located
behind the fuel filler flap, which is located at right rear side of the
vehicle.
The fuel filler flap can only be opened if the vehicle is unlocked.
1. Remove key from ignition switch.2. Close all doors to avoid ammonia fumes entering the interior of the
vehicle.
3. Release the fuel filler flap by pushing the flap 3 216.
4. Unscrew protective cap from the
filler neck.
5. Open AdBlue canister.
6. Mount one end of the hose on the
canister and screw the other end
on the filler neck.
7. Lift the canister until it is empty, or
until the flow from the canister has stopped. This can take up to five
minutes.
8. Place the canister on the ground to empty the hose, wait 15
seconds.
9. Unscrew the hose from the filler neck.
10. Mount the protective cap and turn
clockwise until it engages.
Notice
Dispose of AdBlue canister
according to environmental
requirements. Hose can be reused
after flushing with clear water before
AdBlue dries out.Automatic transmission
The automatic transmission permits
automatic gearshifting (automatic
mode) or manual gearshifting
(manual mode).
Manual shifting is possible in manual
mode by tapping the selector lever or pulling the steering wheel paddles
3 169.
Transmission display
The mode or selected gear is shown
in the transmission display.
170Driving and operatingTemporary manual mode in drive
mode D
Manual paddle shifting is also
possible in automatic mode D. Upon
completion of manual shifting
operation, transmission changes to
automatic mode D after a defined
time.
To interrupt manual mode, do one of
the following:
● Press < paddle for 1 second.
● Move selector lever towards the left to manual mode and back to
position D.
If the vehicle is at a standstill and
engine is idling, the transmission will remain in temporary manual mode. It
changes to automatic mode when
accelerator pedal is operated for a
defined time, and no paddle shifting
at the steering wheel is performed.
General If a higher gear is selected when
vehicle speed is too low, or a lower
gear when vehicle speed is too high,the shift is not executed. This can
cause a message in the Driver
Information Centre.
In manual mode, no automatic
shifting to a higher gear takes place
at high engine revolutions.
Gear shift indication
The symbol R with a number below it
is indicated when gearshifting is
recommended for fuel saving
reasons.
Shift indication appears only in
manual mode.
Electronic driving programmes
● Following a cold start, the operating temperature
programme increases engine
speed to quickly bring the
catalytic converter to the required
temperature.
● The automatic neutral shift function automatically shifts to
idling when the vehicle is stopped
with a forward gear engaged and the brake pedal is pressed.● When SPORT mode is engaged,
the vehicle shifts at higher engine speeds (unless cruise control is
on). SPORT mode 3 178.
● Special programmes automatically adapt the shifting
points when driving up inclines or
down hills.
● When starting off in snowy or icy conditions or on other slippery
surfaces, the electronic
transmission control selects a
higher gear automatically.
Kickdown If the accelerator pedal is pressed
down completely in automatic mode,
the transmission shifts to a lower gear
depending on engine speed.
Overheat protection
In the event of transmission-
overheating due to high outside
temperatures or sporty driving style,
the torque and the maximum speed of the engine can be temporarily
reduced.
Driving and operating175Vehicles with automatic transmission:
Engaging D and then depressing the
accelerator pedal releases the
electric parking brake automatically. This is not possible when switch m is
pulled at the same time.
Dynamic braking when vehicle is
moving
When the vehicle is moving and
switch m is kept pulled, the electric
parking brake system will decelerate the vehicle, but will not apply
statically.
As soon as switch m is released,
dynamic braking will be stopped.
Automatic applying
If the vehicle is equipped with
Automatic transmission and Adaptive cruise control is active, electric
parking brake is applied automatically when vehicle is stopped by the
system for more than two minutes.
Parking brake is released
automatically after moving off.Functionality check
When the vehicle is not moving, the
electric parking brake might be
applied automatically. This is done to
check the system.
Fault
Failure mode of electric parking brake
is indicated by control indicator j and
by a vehicle message which is
displayed in the Driver Information Centre. Vehicle messages 3 119.
Apply electric parking brake: pull and hold switch m for more than
5 seconds. If control indicator m
illuminates, electric parking brake is
applied.
Release electric parking brake: push and hold switch m for more than
2 seconds. If control indicator m
extinguishes, electric parking brake is
released.
Control indicator m flashes: electric
parking brake is not fully applied or
released. When continuously
flashing, release electric parking
brake and retry applying.Brake assist
If brake pedal is depressed quickly
and forcefully, maximum brake force
is automatically applied.
Operation of brake assist might
become apparent by a pulse in the
brake pedal and a greater resistance
when depressing the brake pedal.
Maintain steady pressure on the
brake pedal as long as full braking is
required. Maximum brake force is
automatically reduced when brake
pedal is released.
Hill start assist The system helps prevent unintendedmovement when driving away on
inclines.
When releasing the foot brake after
stopping on an incline, brakes remain on for further two seconds. Brakes
release automatically as soon as the
vehicle begins to accelerate.
The hill start assist is not active during
an Autostop.
Stop-start system 3 159.
Driving and operating179● Steering support is in standardmode.
● Engine torque of All-wheel drive is distributed mainly to the front
axle.
● Shift points of automatic transmission occur in a comfort
mode.
NORMAL mode
All settings of the systems are
adapted to standard values.
Drive mode control
Within each manually selected driving
mode SPORT, TOUR or NORMAL,
the Drive Mode Control (DMC)
detects and analyses continuously
the real driving characteristic,
responses by the driver, and the
active dynamic state of the vehicle. If
necessary, the control unit of DMC
automatically changes the settings
within the selected driving mode or,
when recognising greater variations,
the driving mode is changed for the
length of variation.If, for example, NORMAL mode is selected and DMC detects a sporty
driving behaviour, DMC changes
several settings of the Normal mode
into sporty settings. The DMC
changes to SPORT mode in case of
very sporty driving behaviour.
If, for another example, TOUR mode
is selected and whilst driving on a
winding road a sudden hard brake is
necessary, DMC will detect the
dynamic vehicle condition and
changes the settings for suspension
to SPORT mode to increase vehicle
stability.
When the driving characteristic or the dynamic vehicle state returns to the
former state, DMC will change the
settings to the preselected driving
mode.
Personalised settings in SPORT
mode
The driver can select the functions of
the SPORT mode when SPORT is
pressed.
Select the relevant settings in
Settings , I Sport Mode in the Colour-
Info-Display.Colour-Info-Display 3 117.
Vehicle personalisation 3 120.
Flex Ride - VXR Version
The VXR Version of Flex Ride system works in the same way as the
standard Flex Ride system with the
difference that the modes have a
more sporty characteristic.
Driving and operating215Press LPG to switch between petrol
and liquid gas operation as soon as
the required parameters (coolant
temperature, gas temperature and
minimum engine speed) have been
reached. The requirements are
usually fulfilled after approximately
60 seconds (depending on exterior
temperature) and the first firm press
on the accelerator. The status LED
shows the current operating mode.1 off:petrol operation1 flashes:checking conditions
for fuel transition to
liquid gas operation.
Illuminates if
conditions are fulfilled.1 illumi‐
nates:liquid gas operation1 flashes
five times
and extin‐
guishes:liquid gas tank is
empty or failure in
liquid gas system. A
message is displayed
in the Driver
Information Centre.
If the fuel tank is empty, the engine
will not start.
The selected fuel mode is stored and reactivated at the next ignition cycle if
conditions allow.
As soon as the liquid gas tank is
empty, petrol operation is
automatically engaged until the
ignition is switched off.
When switching automatically
between petrol or gas operation, a
brief delay of engine tractive power
may be noticeable.
Every six months, run the petrol tank
down until control indicator I or
Y illuminates, then refuel. This helps
maintain fuel quality and system
function for petrol operation.
Fill the tank completely at regular
intervals to prevent corrosion in the
tank.
Faults and remedies
If gas mode is not possible, check the following:
● Is there enough liquid gas present?
● Is there enough petrol present for
starting?Due to extreme temperatures in
combination with the gas
composition, it may take slightly
longer before the system switches
from petrol to gas mode.
In extreme situations, the system may
also switch back to petrol mode if the
minimum requirements are not
fulfilled. If conditions allow, it may be possible to manually switch back to
liquid gas operation.
Seek the assistance of a workshop in the event of all other faults.Caution
Repairs and adjustments may onlybe made by trained specialists in
order to maintain the safety and
warranty on the LPG system.
Liquid gas is given a particular odour
(odorised) so that any leaks can be
detected easily.
324Top-tether fastening eyes ............68
Tow bar....................................... 221
Towing ................................ 221, 267
Towing another vehicle .............269
Towing equipment .....................222
Towing the vehicle .....................267
Traction Control system ............. 176 Traction Control system off......... 107
Traffic sign assistant ...........110, 208
Trailer coupling ........................... 221
Trailer stability assist .................224
Trailer towing ............................. 222
Transmission ............................... 16
Transmission display .................167
Tread depth ............................... 256
Trip odometer .............................. 99
Turn and lane-change signals ...134
Turn signal ................................. 103
Tyre chains ................................ 258
Tyre designations ......................253
Tyre pressure ............................ 253
Tyre pressure monitoring system ............................ 108, 255
Tyre pressures ........................... 294
Tyre repair kit ............................. 258
U Ultrasonic parking assist ...106, 196
Upholstery .................................. 273
Uplevel display ........................... 110Upshift........................................ 106
Using this manual ..........................3
V Valet mode ................................. 117
Variable effort steering ...............106
Vehicle battery ........................... 232
Vehicle checks............................ 227
Vehicle data ................................ 280
Vehicle data recording and privacy ..................................... 317
Vehicle detected ahead ..............109
Vehicle dimensions .................... 291
Vehicle Identification Number ....278
Vehicle jack ................................ 252
Vehicle messages .....................119
Vehicle personalisation .............120
Vehicle security ............................ 33
Vehicle specific data ......................3
Vehicle storage ........................... 226
Vehicle tools ............................... 252
Vehicle unlocking ........................... 6
Vehicle weight ........................... 288
Ventilating ..................................... 53
Ventilation ................................... 140
W
Warning chimes .........................119
Warning lights ............................... 99
Warning triangle .......................... 80
Washer and wiper systems .........13Washer fluid ............................... 231
Wheel changing .........................261
Wheel covers ............................. 257
Wheels and tyres .......................253
Windows ....................................... 39
Windscreen................................... 39
Windscreen wiper/washer ...........86
Winter tyres ............................... 253
Wiper blade replacement ..........234
X Xenon headlights .......................238