Driving and operating143The control indicator % extinguishes
as soon as the self-cleaning
operation is complete.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.Caution
Fuel grades other than those listed on pages 3 178, 3 241 could
damage the catalytic converter or
electronic components.
Unburnt petrol will overheat and
damage the catalytic converter.
Therefore avoid excessive use of the starter, running the fuel tank
dry and starting the engine by
pushing or towing.
In the event of misfiring, uneven
engine running, a reduction in engine
performance or other unusual
problems, have the cause of the fault
rectified by a workshop as soon as
possible. In an emergency, driving
can be continued for a short period,
keeping vehicle speed and engine
speed low.
AdBlue
General information
The selective catalytic reduction
(BlueInjection) is a method to
substantially reduce the nitrogen
oxides in the exhaust emission. This
is achieved by injecting a Diesel
Exhaust Fluid (DEF) into the exhaust
system.
The designation of this fluid is AdBlue Ⓡ 1)
. It is a non-toxic, non-flammable,
colourless and odourless fluid which
consists of 32% urea and 68% water.9 Warning
Avoid contact of your eyes or skin
with AdBlue.
In case of eye or skin contact,
rinse off with water.
Caution
Avoid contact of the paintwork with
AdBlue.
In case of contact, rinse off with water.
AdBlue freezes at a temperature of
approx. -11 °C. As the vehicle is
equipped with an AdBlue pre-heater,
the emissions reduction at low
temperatures is ensured. The AdBlue
pre-heater works automatically.
Level warnings
The AdBlue consumption is approx.
4000 mpg and depends on the driving
behaviour.
If the AdBlue level falls below a
certain value, a level warning AdBlue
Range: 1500 mi will be displayed in
the Driver Information Centre.
A volume of at least 5 litres of AdBlue must be refilled as soon as possible.
Driving is possible without any
restrictions.
1) Registered trademark of the Verband der Automobilindustrie e.V. (VDA).
144Driving and operatingIf AdBlue is not refilled within a certaindistance, further level warnings are
displayed in the Driver Information Centre depending on the current
AdBlue level. Later on requests to
refill AdBlue and finally the
announcement to prevent an engine
restart are displayed. These
restrictions are a legal requirement.
At an AdBlue range of 560 miles, the
following warning messages are
alternately displayed in the Driver
Information Centre:
● AdBlue Low Refill Now
● Engine Restart Prevented in 560
miles
Additionally, the control indicator Y
flashes continuously and a warning
chime sounds four times every
three minutes.
Before the prevention of the engine
restart is activated, the following
warning messages:
● AdBlue Empty Refill Now
● Engine Will Not Restart
are alternately displayed in the Driver
Information Centre.Additionally, the control indicator Y
flashes continuously and a warning
chime sounds four times every
three minutes.
After the prevention of the engine
start, the following message:
Refill AdBlue To Start Vehicle
will be displayed.
To restart the engine, the tank must be filled with AdBlue first.
High emission warnings If the exhaust emission rises above a
certain value, warnings similar to the
range warnings as described above
will be displayed in the Driver
Information Centre.
Requests to have the exhaust system checked and finally the
announcement to prevent an engine
restart are displayed. These
restrictions are a legal requirement.
Seek your workshop for assistance.Refilling AdBlueCaution
Only use AdBlue that complies
with European standards
DIN 70 070 and ISO 22241-1.
Do not use additives.
Do not dilute AdBlue.
Otherwise the selective catalytic
reduction system could be
damaged.
Notice
Only use the designated AdBlue canisters for refilling, to prevent a
topping-up of too much AdBlue.
Additionally, the fumes in the tank
are captured in the canister and do
not emerge.
Since AdBlue has a limited
durability, check the date of expiry
before refilling.
146Driving and operatingExchanging AdBlue
If less than 5 litres of AdBlue have
been refilled during the last 2 years,
the remaining fluid should be
exchanged since AdBlue has a
limited durability. Seek the assistance of a workshop.Caution
Disregard could lead to damage to
the selective catalytic reduction
system.
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
3 148.
Transmission display
The mode or selected gear is shown
in the transmission display.
In automatic mode, the driving
programme is indicated by D in the
Driver Information Centre.
In manual mode, M and the number
of the selected gear is indicated.
R indicates reverse gear.
N indicates neutral position.
P indicates park position.
148Driving and operatingParking
Apply the parking brake and engage
P .
The ignition key can only be removed
when the selector lever is in position
P .
Manual mode
Move selector lever out of position D
towards the left to select manual
mode M.
Tap selector lever
forwards <:shift to a higher gearbackwards ]:shift to a lower gearThe selected gear is indicated in the
instrument cluster.
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.
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 andthe brake pedal is pressed.● When SPORT mode is engaged,
the vehicle shifts at higher engine
speeds (unless cruise control is
on). SPORT mode 3 155.
● Special programmes automatically adapt the shifting
points when driving up inclines or
down hills.
Kickdown If the accelerator pedal is pressed
down completely in automatic mode,
the transmission shifts to a lower gear
depending on engine speed.
Fault
In the event of a fault, a vehicle message is displayed in the Driver
Information Centre. Vehicle
messages 3 101.
The transmission no longer shifts automatically. Continued travel is
possible with manual shifting.
Only the highest gear is available.
Depending on the fault, 2nd gear may also be available in manual mode.
Shift only when vehicle is at a
standstill.
152Driving and operatingadequate force. For maximum
force, e.g. parking with trailer or on
inclines, pull switch m twice.
The electric parking brake is
applied when control indicator m
illuminates 3 90.
The electric parking brake can always
be activated, even if the ignition is off.
Do not operate electric parking brake
system too often without engine
running as this will discharge the
vehicle battery.
Before leaving the vehicle, check the electric parking brake status. Control
indicator m 3 90.
Releasing
Switch on ignition. Keep brake pedal
depressed then push switch m.
Drive away function
Vehicles with manual transmission:
Depressing the clutch pedal and then
slightly releasing the clutch pedal and
slightly depressing the accelerator
pedal releases the electric parking
brake automatically. This is not
possible when the switch m is pulled
at the same time.
Vehicles with automatic transmission: Engaging D and then depressing the
accelerator pedal releases the
electric parking brake automatically. This is not possible when the switch
m is pulled at the same time.
Dynamic braking when vehicle is
moving
When the vehicle is moving and the
switch m is kept pulled, the electric
parking brake system will decelerate
the vehicle, but will not apply
statically.
As soon as the switch m is released,
dynamic braking will be stopped.
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.Apply electric parking brake: pull and
hold the switch m for more than
5 seconds. If control indicator m
illuminates, electric parking brake is applied.
Release electric parking brake: push
and hold the 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 the brake pedal is depressed
quickly and forcefully, maximum
brake force is automatically applied
(full braking).
Maintain steady pressure on the
brake pedal for as long as full braking
is required. Maximum brake force is
automatically reduced when the
brake pedal is released.
154Driving and operatingDeactivation
TC can be switched off when spinningof drive wheels is required:
Press b briefly to deactivate TC, k
illuminates. Deactivation is displayed
as status message in the Driver
Information Centre.
TC is reactivated by pressing b
again.
TC is also reactivated the next time
the ignition is switched on.
Electronic Stability Control
Electronic Stability Control (ESC)
improves driving stability when
necessary, regardless of the type of
road surface or tyre grip. It also
prevents the drive wheels from
spinning. ESC operates in
combination with the Traction Control system (TC) 3 153.
As soon as the vehicle starts to
swerve (understeer/oversteer),
engine output is reduced and the
wheels are braked individually. This
considerably improves the driving
stability of the vehicle on slippery road
surfaces.ESC is operational after each engine
start as soon as the control indicator
b extinguishes.
When ESC operates b flashes.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Control indicator b 3 92.
Deactivation
Driving and operating155For a more sporty behaviour ESC and
TC can be deactivated separately:
● Press b briefly: only Traction
control system is inactive, ESC
remains active, k illuminates
● Press and hold b for at least
5 seconds: TC and ESC are
deactivated, k and n illuminate.
Additionally, the selected mode is displayed as status message in the
Driver Information Centre.
If the vehicle comes into threshold
with deactivated ESP, the system will reactivate ESP for the time duration
of the threshold, when the brake
pedal is depressed once.
ESC is reactivated by pressing b
again. If the TC system was
previously disabled, both TC and
ESC are reactivated.
ESC is also reactivated the next time
the ignition is switched on.Interactive driving system
Flex Ride
Flex Ride driving system allows the
driver to select between three driving
modes:
● SPORT mode: press SPORT,
LED illuminates.
● TOUR mode: press TOUR, LED
illuminates.
● NORMAL mode: both SPORT
and TOUR are not pressed, no
LED illuminates.
Deactivate SPORT mode and TOUR
mode by pressing corresponding
button once more.
In each driving mode, Flex Ride
networks the following electronic
systems:
● Continuous Damping Control
● Accelerator Pedal Control
● Steering Control
● Electronic Stability Control (ESC)
● Antilock brake system (ABS) with
cornering brake control
● Automatic transmission.SPORT mode
The settings of the systems are
adapted to a sportier driving style:
● Damping of shock absorbers reacts more stiffly to providebetter contact with the road
surface.
● The engine reacts more quickly to the accelerator pedal.
● Steering support is reduced.
● Shift points of automatic transmission occur later.
● With SPORT mode activated, the
illumination of main instruments changes from white to red.
156Driving and operatingTOUR mode
The settings of the systems are
adapted to a comfort driving style:
● Damping of shock absorbers reacts more softly.
● Accelerator pedal reacts with standard settings.
● Steering support is in standard mode.
● Shift points of automatic transmission occur in a comfort
mode.
● Illumination of main instruments is white.
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 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 Drive Mode Control
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 Drive Mode Control
detects a sporty driving behaviour,
Drive Mode Control changes several settings of the NORMAL mode into
sporty settings. The Drive Mode
Control 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 isnecessary, Drive Mode Control 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, Drive Mode Control will
change the settings to the
preselected driving mode.
Personalised settings in the
SPORT mode
The driver can select the functions of
the SPORT mode when SPORT is
pressed. These settings can be changed in the Settings menu in the
Info-Display. Vehicle personalisation
3 103.