Driving and operating141
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 DIC.
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 (DIC).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.
Notice
A volume of at least 5 litres of AdBlue must be added when refilling.
Otherwise the refilling of AdBlue
may not be detected by the system.
If AdBlue must be refilled at
temperatures below -11 °C, the
refilling of AdBlue may not be
detected by the system. In this case, park the vehicle in a space with a
higher ambient temperature until
AdBlue is liquefied.
Notice
When unscrewing the protective cap
from the filler neck, ammonia fumes may emerge. Do not inhale as the
fumes have a pungent smell. The
fumes are not harmful by inhalation.
The vehicle must be parked on a level surface.
The filler neck for AdBlue is located behind the fuel filler flap.
The fuel filler flap is located at right rear side of the vehicle.
Driving and operating149
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.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 two seconds.
The brakes release automatically as
soon as the vehicle begins to
accelerate.
The hill start assist is not active during
an Autostop.Ride control systems
Traction Control system
The Traction Control system (TC) is a
component of the Electronic Stability
Control (ESC) 3 150.
TC improves driving stability when
necessary, regardless of the type of
road surface or tyre grip, by
preventing the drive wheels from
spinning.
As soon as the drive wheels starts to spin, engine output is reduced and
the wheel spinning the most is braked
individually. This considerably
improves the driving stability of the
vehicle on slippery road surfaces.
Driving and operating159
The minimum indicated distance is
0.5 seconds.
If there is no vehicle ahead or the vehicle ahead is out of range, two
dashes will be displayed: -.- s.
Parking assist
Rear parking assist9 Warning
The driver bears full responsibility
for the parking manoeuvre.
Always check the surrounding
area while reversing and using the rear parking assist system.
The rear parking assist makes
parking easier by measuring the
distance between the vehicle and
rear obstacles. It informs and warns
the driver by giving acoustic signals.The system has four ultrasonic
parking sensors in the rear bumper.
Activation
When reverse gear is engaged, the
system is ready to operate
automatically.
An illuminated LED in the parking
assist button r indicates that the
system is ready to operate.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles behind the
vehicle. The interval between the
sounds becomes shorter as the
160Driving and operating
vehicle gets closer to that obstacle.
When the distance is less than
approx. 30 cm, the sound is
continuous.
Additionally, the distance to obstacles can be shown in the Driver
Information Centre (DIC).
Deactivation
The system automatically switches
off when reverse gear is disengaged.
To switch on the system again,
engage reverse gear.
Manual deactivation is also possible
by pressing the parking assist button
r .
When the system is deactivated, the
LED in the button extinguishes.
Additionally, Park Assist Off pops-up
in the DIC when the system is
deactivated manually.
Fault
In the event of a fault in the system or if the system does not work due to
temporary conditions like ice covered
sensors, a message is displayed in
the DIC.
Vehicle messages 3 102.
Front-rear parking assist9 Warning
The driver bears full responsibility
for the parking manoeuvre.
Always check the surrounding
area when driving backwards or
forwards while using parking
assist system.
The front-rear parking assist
measures the distance between the vehicle and obstacles in front and
behind the vehicle. The system gives acoustic signals and display
messages.
The system has four ultrasonic
parking sensors each in the rear and
front bumper.
It uses two different acoustic warning
signals for the front and rear
monitoring areas, each with a
different tone frequency. The signal
for front obstacles sounds via the
front speakers, for rear obstacles it
sounds from the rear of the vehicle.
Driving and operating161
Parking assist button and operation
logic
Front-rear parking assist is equipped
with button r. If the vehicle is
additionally equipped with advanced parking assist (see the following
separate description) the system is
equipped with button D. In this
case, both systems will be operated
by button D.
Short press of button r or D
deactivates or activates the front parking assist.
Long press of button D (approx.
one second) activates or deactivates
the advanced parking assist.
Button logic operates the systems by
pressing as following:
■ Front-rear parking assist is active: short press deactivates front-rear
parking assist.
■ Front-rear parking assist is active: long press activates advanced
parking assist if a forward gear is engaged.
■ Advanced parking assist is active: short press activates front-rear
parking assist.
■ Advanced parking assist is active: long press deactivates advanced
parking assist.
■ Advanced parking assist and front- rear parking assist are active: shortpress deactivates both systems.
Activation
When reverse gear is engaged, the
front and rear parking assist is ready
to operate.The front parking assist is also
activated automatically at a speed up to 7 mph.
An illuminated LED in the parking
assist button r or D indicates that
the system is ready to operate.
If the vehicle exceeds a speed of
7 mph, the front parking assist is
deactivated. The front parking assist
is always reactivated when vehicle
speed drops below 7 mph.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles behind and in
front of the vehicle. Depending on
which side of the vehicle is closer to
an obstacle, you will hear acoustic warning signals on the respective
side of the vehicle. The interval
between the sounds becomes shorter as the vehicle gets closer to that
obstacle. When the distance is less
than approx. 30 cm, the sound is
continuous.
Additionally, the distance to obstacles
is shown in the DIC 3 95.
162Driving and operating
The distance to a front and rear
obstacle is indicated by changing
distance lines around the vehicle.
Rear obstacles are indicated
acoustically and visually at the same
time.
Front obstacles are indicated visually
first. At distances less than 80 cm an
acoustic signal also sounds.
The distance indication in the DIC can be inhibited by vehicle messages with
a higher priority. After approving the
message by pressing the SET/CLR
button on the turn signal lever,
distance indication appears again.
Deactivation
The rear parking assist automatically
switches off when reverse gear is
disengaged.
The front parking assist is deactivated automatically at a speed above
7 mph.
Manual deactivation is possible by
pressing the parking assist button
r or D briefly.
When the system is deactivated, the
LED in the button extinguishes.
Additionally, Park Assist Off pops-up
in the DIC when the system is
deactivated manually.
After a manual deactivation, the front
parking assist is activated again if the
parking assist button r or D is
pressed or if reverse gear is engaged.
Fault
In the event of a fault in the system or if the system does not work due to
temporary conditions, e.g. ice
covered sensors, a message is
displayed in the DIC.
Vehicle messages 3 102.
Advanced parking assist9 Warning
The driver bears full responsibility
for accepting the parking slot
suggested by the system and the
parking manoeuvre.
Always check the surrounding
area in all directions when using
advanced parking assist.
Driving and operating163
The advanced parking assist system
manoeuvres the driver into a parking slot by giving instructions in the DIC
and acoustic signals. The driver must
control acceleration, braking, steering and gear shifting.
The system uses the sensors of the
front-rear parking assist in
combination with two additional
sensors on both sides of the front and rear bumper.
Button D and operation logic
Advanced parking assist and front-
rear parking assist, (see previous
description) are both operated by the
button D.
Short press of D deactivates or
activates the front parking assist.
Long press of D (approx.
one second) activates or deactivates
the advanced parking assist.
Button logic operates the systems by
pressing as following:
■ Front-rear parking assist is active: short press deactivates front-rear
parking assist.
■ Front-rear parking assist is active: long press activates advanced
parking assist if a forward gear is engaged.
■ Advanced parking assist is active: short press activates front-rearparking assist.■ Advanced parking assist is active: long press deactivates advanced
parking assist.
■ Advanced parking assist and front- rear parking assist are active: shortpress deactivates both systems.
Activation
When searching for a parking slot, the
system is ready to operate by
pressing button D for approx.
one second.
The system can only be activated at
a speed up to 18 mph and the system searches for a parking slot at a speed up to 18 mph.
164Driving and operating
The maximum allowed parallel
distance between the vehicle and a
row of parked cars is 1.8 metres.
Functionality
When the vehicle passes a row of
cars and the system is activated, the
advanced parking assist system
begins searching for a suitable
parking slot. When a suitable slot is
detected, a visual feedback in the DIC
and an acoustic signal are given.
If the driver does not stop the vehicle within 10 metres after a parking slot is proposed, the system starts to search
for another suitable parking slot.
The parking slot suggestion of the
system is accepted when the vehicle
is stopped by the driver within
10 metres after the "Stop" message is
given. The system calculates the
optimal route into the parking slot.
Then it manoeuvres the driver into the slot by giving detailed instructions.The instructions in the display show:
■ A hint when driving faster than 18 mph.
■ The demand to stop the vehicle, when a parking slot is detected.
■ The direction of driving during the parking manoeuvre.
■ The steering wheel position during parking.
■ For some of the instructions a progress bar is shown.