Driving and operating131AdBlue
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 Ⓡ. It is a non-toxic, non-flammable,
colourless and odourless fluid which
consists of 32% urea and 68% water.
Note
AdBlue Ⓡ is a registered trademark
of the Verband der
Automobilindustrie e.V. (VDA).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.
The typical AdBlue consumption is
approx. two litres per 1000 km, but
can also be higher depending on
driving behaviour (e.g. high load or
towing).
Level warnings
If the AdBlue level falls below a
certain value, a level warning (e.g.
"AdBlue Range: 2400 km") will be
shown in the Driver Information
Centre 3 91, located in the centre of
the instrument cluster.
Refill the tank with a volume of at least
10 litres of AdBlue as soon as
possible. Refer to " Refilling AdBlue"
below.
Driving is possible without any
restrictions.
132Driving and operatingIf AdBlue is not refilled within a certaindistance, further level warnings are
shown in the Driver Information
Centre, depending on the current
AdBlue level.
Subsequent requests to refill AdBlue
and finally the announcement that an engine restart will be prevented are
displayed in the Driver Information
Centre.
Note
These restrictions are a legal
requirement.At an AdBlue range of 900 km, the following warning messages are
alternately displayed in the Driver
Information Centre:
● AdBlue Low Refill Now
● Engine Restart Prevented in
900 km
Additionally, control indicator Y
flashes continuously.
Engine restarts prevented
Before the prevention of an engine
restart, the following warning
messages are alternately displayed in the Driver Information Centre:
● AdBlue Empty Refill Now
● Engine Will Not Restart
These messages indicate that after
switching off the ignition, an engine
restart will be prohibited.
Additionally, control indicator Y
flashes continuously.
After the prevention of an engine
start, a warning message (e.g. "Refill
AdBlue To Start Vehicle") is displayed
in the Driver Information Centre
reminding the driver that AdBlue level
is insufficient.
To allow the engine to be restarted,
the tank should be filled with at least
10 litres of AdBlue.
High emission warningsIf 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 that an engine restart
will be prevented are displayed in the
Driver Information Centre.
Driving and operating135
4. Attach the adapter (located inglovebox) to 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 adapter.
7. Lift the canister until it is empty. 8. Unscrew the hose from the filler neck adapter.
9. Remove the adapter and return to
its container in the glovebox.
10. Mount the protective cap and turn
clockwise until it engages.
11. Replace the cover.
Note
Dispose of AdBlue canister and
hose according to environmental requirements.
Note
If an AdBlue refill is not detected,
drive continuously for 10 minutes,
keeping vehicle speed above
20 km/h.
If the AdBlue refill is detected
successfully, AdBlue level warnings
will disappear.
If the AdBlue refill is not detected
some time after running the engine,
seek the assistance of a workshop.
Note
If less than 10 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.
Disregard could lead to damage to
the selective catalytic reduction
system.
Filler cap
Only use genuine filler caps. AdBlue
tank has a special filler cap.Fault
If the system detects an operating
fault, control indicator Y illuminates
together with a warning chime. Seek
the assistance of a workshop
immediately.
A corresponding message may
appear in the Driver Information
Centre 3 91.
Driving and operating143ABS starts to regulate brake pressure
as soon as a wheel shows a tendency to lock. The vehicle remains
steerable, even during hard braking.
ABS control is made apparent
through a pulse in the brake pedal
and the noise of the regulation
process.
For optimum braking, keep the brake
pedal fully depressed throughout the
braking process, despite the fact that
the pedal is pulsating. Do not reduce
the pressure on the pedal.
After starting off, the system performs a self-test which may be audible.
Control indicator u 3 85.
Fault9 Warning
If there is a fault in the ABS, the
wheels may be liable to lock due
to braking that is heavier than
normal. The advantages of ABS
are no longer available. During
hard braking, the vehicle can nolonger be steered and may
swerve.
You can continue driving, provided
you drive with care and anticipation.
Have the cause of the fault remedied
by a workshop.
Parking brake
Electrical parking brake
Applying when vehicle is stationary
Pull switch m, the electrical parking
brake operates automatically with
adequate force. For maximum force,
e.g. parking with a trailer or on
inclines, pull switch m twice.
The electrical parking brake can
always be activated, even if the
ignition is off.
Do not operate electrical parking
brake system too often without
engine running as this will discharge
the battery.
Before leaving the vehicle, check the
electrical parking brake status.
Control indicator m 3 85.
Releasing
Switch on ignition. Keep foot brake
depressed and then push switch m.
If the foot brake is not depressed
when attempting to release electrical
parking brake, a warning chime will
sound and control indicator -
illuminates in the instrument cluster
3 90.
144Driving and operatingDrive away function
With the engine running, selecting a
forward gear (manual transmission)
or engaging D (automatic
transmission) and then depressing
the accelerator pedal automatically
releases the electrical parking brake.
This is not possible when the switch
m is pulled at the same time.
This function also helps driving away
on inclines.
Aggressive drive away may reduce
life time of wear parts.
Dynamic braking when vehicle is
moving
When the vehicle is moving and the
switch m is kept pulled, a warning
chime will sound and the electrical
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 electrical parking
brake is indicated by control indicator
j 3 85.In the event of a fault, to apply
electrical parking brake: pull and hold the switch m for a few seconds. If
control indicator m illuminates,
electrical parking brake has been applied successfully.
To release electrical parking brake:
push and hold the switch m for a few
seconds. If control indicator m
extinguishes, electrical parking brake
has been released successfully.
If control indicator m flashes:
electrical parking brake is not fully applied or released. When m is
continuously flashing, with ignition
switched on depress brake pedal,
release electrical parking brake and
retry applying.
If m continues to flash, do not drive
the vehicle. If necessary, place
wedge blocks or equivalent in front of and behind wheels to prevent vehicle movement. Seek the assistance of a
workshop to have the cause of the
fault remedied.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.
Hill start assist The system helps prevent unintendedmovement when driving away on
inclines.
When releasing the foot brake after
stopping on an incline, the brakes
remain on for a further 2 seconds. The
brakes release automatically as soon as the vehicle begins to accelerate.
Driving and operating145Ride control systems
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.
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 as soon as control indicators b and t extinguish in the
instrument cluster after switching on
the ignition.
When ESC is active b flashes 3 87.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Deactivation
With ESC active, if wheels are
slipping on wet, snowy or icy roads,
engine speed may not increase when
accelerator pedal is depressed. The
vehicle may not move.
Switch off ESC function, to allow
engine rpm to increase, by pressing
t briefly. Control indicator t
illuminates in the instrument cluster.
ESC is reactivated by pressing t
again. The control indicator
extinguishes.
Control indicator t 3 87.
Hydraulic brake assist When the ESC function comes intoaction and recognises any
emergency situation requiring hard
braking, it automatically delivers
increased braking pressure to the
wheels.
Active rollover protection
If the vehicle moves in an unstable
manner, this function helps the
vehicle maintain normal stability.
Driving and operating147temperatures may differ according to
vehicle conditions or outside
conditions.
Flashing or illumination of the yellow
control indicator u reminds the driver
that the friction material needs to cool
down: drive the vehicle without
braking as much as possible. If the
control indicator does not extinguish,
have the cause of the fault remedied
by a workshop.
DSC control indicators u 3 86.
Automatic level control
The rear level of the vehicle is
automatically adjusted to the load
conditions while driving. Suspension
and ground clearance are increased,
which improves driving conditions.
The automatic level control is
activated after the vehicle has been
driven for some distance, depending
on the vehicle load and the road
conditions.
Do not use full payload in the event of
a fault. Have the cause of the fault
remedied by a workshop.
Headlight range adjustment 3 106.Driver assistance
systems9 Warning
Driver assistance systems are
developed to support the driver
and not to replace the driver's
attention.
The driver accepts full
responsibility when driving the
vehicle.
When using driver assistance
systems, always take care
regarding the current traffic
situation.
Cruise control
The cruise control can store and
maintain speeds above 40 km/h.
Deviations from the stored speeds
may occur when driving uphill or
downhill.
For safety reasons the cruise control
cannot be activated until the foot
brake has been operated once.
Do not use the cruise control if it is not advisable to maintain a constant
speed.
With automatic transmission, only activate cruise control in automatic
mode.
Control indicator m 3 91.
Switching on
Press e ; control indicator m
illuminates yellow in the instrument
cluster.
148Driving and operatingActivation
Accelerate to the desired speed,
press - SET and release it. The
current speed is stored and
maintained. Control indicator m
illuminates green. 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.
Increase speed
With cruise control active, press and
hold + RES or tap + RES repeatedly:
speed increases continuously or in
small increments.
Alternatively accelerate to the desired speed and store by pressing - SET.
Reduce speed
With cruise control active, press and
hold - SET or tap - SET repeatedly:
speed decreases continuously or in
small increments.Switching off
Press e ; control indicator m
extinguishes and the vehicle slowly
decelerates.
Automatic deactivation: ● vehicle speed below approx. 45 km/h,
● the brake pedal is depressed,
● the clutch pedal is depressed,
● selector lever in N,
● the Electronic Stability Control is operating.
Resume stored speed
Press + RES at a speed above
45 km/h. The stored speed will be
obtained.
Deleting the stored speed The stored speed will be deleted by
pressing e or switching off
the ignition.Parking assist9 Warning
It is the driver who bears full
responsibility for the parking
manoeuvre.
Always check the surrounding
area while reversing and using the rear parking assist system.
The parking assist system makes
parking easier by measuring the
distance between the vehicle and
obstacles to the front and rear, and
giving acoustic signals.