Driving and operating133An Autostop is indicated when Ï
illuminates green in the instrument
cluster.
During an Autostop, the heating
performance, power steering and
brake performance will be
maintained. Brake assist, however, is
not available 3 151.
Note
If you exit the vehicle while the
engine is in an Autostop, a warning
chime will sound as a reminder that
the engine is on standby and has not been switched off.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled,
otherwise an Autostop will be
inhibited and control indicator \ will
illuminate in the instrument cluster.
● the stop-start system is not manually deactivated
● the bonnet is fully closed
● the driver's door is closed or the driver's seat belt is fastened
● the vehicle battery is sufficiently charged and in good condition● the engine is warmed up
● the engine coolant temperature is
not too high
● the ambient temperature is not too low
● the defrosting function is not activated
● the climate control system does not inhibit an Autostop
● the brake vacuum is sufficient ● the self-cleaning function of the diesel particle filter is not active
● the vehicle has moved since the last Autostop
Otherwise an Autostop will be
inhibited.
An Autostop may become
unavailable as the ambient
temperature approaches freezing
point.
Certain settings of the climate control system may also inhibit an Autostop.See "Climate control" chapter for
further information 3 112.
Immediately after motorway driving
an Autostop may be inhibited.Autostop may also be inhibited
temporarily if the vehicle battery has
been recharged by an external
source.
New vehicle running-in 3 130.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several vehicle battery discharge
protection features are implemented
as part of the stop-start system.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
If the selector lever has been shifted
out of neutral (manual transmission)
or N (manual transmission
automated) or other conditions are
not met, start using the ignition key.
The green control indicator Ï will
extinguish in the instrument cluster
when the engine is restarted.
If the selector lever is shifted out of
neutral (manual transmission) or N
(manual transmission automated) before depressing the clutch first, a
restart will not take place.
134Driving and operatingRestart of the engine by the stop-
start system
The selector lever must be in neutral(manual transmission) or N (manual
transmission automated) to enable an
automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system. Control
indicator Ï will flash green in the
instrument cluster during an
automatic engine restart.
● the stop-start system is manually
deactivated
● the bonnet is opened
● the driver's seat belt is unfastened and the driver's door
is opened
● the engine temperature is too low
● the vehicle battery is discharged
● the brake vacuum is not sufficient
● the vehicle starts to move
● the defrosting function is activated● the climate control systemrequests an engine start
● the predetermined timing has been exceeded
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop during restart might be noticeable.
If the Infotainment system is active,
audio sound may briefly be reduced
or interrupted during the restart.
Warning chimes 3 99.
Fault
If control indicator Ï illuminates
yellow, there is a fault in the stop-start system 3 96. A corresponding
message also appears in the Driver
Information Centre 3 98. Seek the
assistance of a workshop.Parking9 Warning
● Do not park the vehicle on an
easily ignitable surface. The
high temperature of the
exhaust system could ignite the
surface.
● Always apply parking brake without pressing release
button. Apply as firmly as
possible on a downhill slope or
uphill slope. Depress brake
pedal at the same time to
reduce operating force.
● Switch off the engine.
● If the vehicle is on a level surface or uphill slope, engage
first gear. On an uphill slope,
turn the front wheels away from
the kerb.
If the vehicle is on a downhill
slope, engage reverse gear.
Turn the front wheels towards the kerb.
138Driving and operatingMalfunction indicator light 3 93.
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 ®
. 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.
AdBlue gauge
In versions without AdBlue level
warnings in the Driver Information
Centre, an AdBlue gauge is present,
which shows the current AdBlue fluid
level remaining in the tank.
AdBlue gauge 3 87.
Level warnings
The AdBlue consumption is approx.
1.5 litres per 1000 km and depends
on the driving behaviour.
Version with level warnings in the
Driver Information Centre
If the AdBlue level falls below a
certain value, a level warning will be
displayed in the Driver Information
Centre 3 98.
Driving and operating139
Additionally, control indicator Õ
illuminates continuously together with a warning chime.
Refill the AdBlue tank as soon as
possible. Refer to "Refilling AdBlue"
below.
If AdBlue is not refilled within a certain
distance, further level warnings are
displayed in the Driver Information
Centre depending on the current
AdBlue level.
Engine restarts prevented
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.
Before the prevention of an engine
restart, a warning message with
0 km is displayed in the Driver
Information Centre, indicating that after switching off the ignition an
engine restart will be prohibited.
After the prevention of an engine
start, a warning message 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 refilled completely
or with a volume of at least ten litres
of AdBlue, depending on AdBlue
consumption.Warning stages: level warnings,
engine restarts prevented 1. Y illuminates after the ignition is
switched on with warning
message LEVEL ADBLUE LOW :
Driving is possible without any
restrictions.
Refill the AdBlue tank as soon as
possible.2. Y illuminates during driving with
warning message TOP UP
ADBLUE :
Possible loss of engine power.
Refill the AdBlue tank as soon as
possible.
3. Y illuminates during driving with
warning message XXX KM STOP
ADD ADBLUE :
Vehicle speed may be limited to
20 km/h after switching the engine
off and on again until the range is
reduced to 0 km.
Refill the tank completely or with a volume of at least ten litres of
AdBlue (depending on AdBlue
consumption) as soon as
possible.
4. Y illuminates during driving with
warning message 0 KM STOP
ADD ADBLUE :
The engine cannot be restarted
after switching off the ignition.
To allow the engine to be
restarted, refill the tank
completely or with a volume of at
least ten litres of AdBlue
(depending on AdBlue
140Driving and operatingconsumption) as soon as
possible.
Illumination of control indicator Y may
be accompanied by a warning chime.
Warning chimes 3 99.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. Control indicator
Õ illuminates continuously together
with A 3 93 and a warning chime.
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.
Note
These restrictions are a legal
requirement.
At an AdBlue range of 1100 km, a
warning message is displayed in the
Driver Information Centre showing
the remaining distance the vehicle
can travel before engine restarts are
prevented. This warning message is
repeated every 100 km.Seek the assistance of a workshop as
soon as possible.Warning stages: high emission
warnings 1. Y and A illuminate with warning
message CHECK ANTI-
POLLUTION :
Fault in the system that may result in a loss of engine power.
Seek the assistance of a
workshop as soon as possible.
2. Y and A illuminate with warning
message ANTIPOLLUTION xxx
KM FAIL :
Indicates that in less than 1100 km an engine restart will be
prohibited after switching off the
ignition.
This warning message will be
repeated every 100 km.
Vehicle speed may be limited to
20 km/h after switching the engine
off and on again until the range is
reduced to 0 km.Seek the assistance of a
workshop as soon as possible.
3. Y and A illuminate with warning
message ANTIPOLLUTION 0 KM
FAILURE :
The engine cannot be restarted
after switching off the ignition.
Seek the assistance of a
workshop.
Illumination of control indicators Y
and A may be accompanied by a
warning chime.
Warning chimes 3 99.
Version without level warnings in the
Driver Information Centre
Driving and operating141When the AdBlue gauge shows the
level is very low, control indicator Õ
first illuminates continuously, then as
AdBlue level drops to a certain
amount Õ flashes for a few seconds
then illuminates continuously.
Refill the AdBlue tank as soon as
possible. Refer to "Refilling AdBlue"
below.
Driving is possible without any
restrictions.Engine power loss
As the AdBlue level drops further,
control indicator Õ flashes for a few
seconds then illuminates
continuously, accompanied by a
warning chime and loss of engine
power.
Note
These restrictions are a legal
requirement.
If AdBlue is not refilled before the tank
is empty, Õ flashes and after the next
engine restart the vehicle speed will
be limited to approx. 20 km/h.Immediately refill the tank completely or with a volume of at least ten litres
of AdBlue, depending on AdBlue
consumption.Warning stages: level warnings,
engine power loss
1. Range A. No control indicator:
Driving is possible without any
restrictions.
2. Range B. Control indicator Y
illuminates:
Refill the AdBlue tank as soon as
possible.
3. Range C. Control indicator Y
flashes for a few seconds each
time the ignition is switched on,
then illuminates continuously:
Refill the AdBlue tank as soon as
possible.
4. Range D. Control indicator Y
flashes for a few seconds each
time the ignition is switched on
then illuminates continuously,
accompanied by a warning chime:
Loss of engine power.
Refill the tank completely or with a
volume of at least ten litres of
AdBlue (depending on AdBlue
consumption) as soon as
possible.
5. Range E. Tank is empty and Y
flashes accompanied by warning chimes:
Vehicle speed will be limited to
20 km/h after switching the engine
off and on again.
Refill the tank completely or with a
volume of at least ten litres of
AdBlue (depending on AdBlue
consumption) as soon as
possible.
142Driving and operatingHigh emission warnings
If the exhaust emission rises above a certain value, control indicator Õ
illuminates together with A 3 93.
Consult a workshop as soon as
possible.
If the fault is not rectified within a
certain distance, Õ and A flash for
a few seconds then illuminate
continuously. Loss of engine power.
When the fault is critical, Õ and A
flash continuously and after the next
engine restart the vehicle speed will
be limited to approx. 20 km/h.
Note
These restrictions are a legal
requirement.
Seek the assistance of a workshop as
soon as possible.Warning stages: high emission
warnings 1. Y and A illuminate:
Fault in the system.
Seek the assistance of a
workshop as soon as possible.2. Y and A flash when the engine
is started then illuminate
continuously:
Fault in the system resulting in a
loss of engine power.
Seek the assistance of a
workshop as soon as possible.
3. Y and A flash:
Fault in the system.
Vehicle speed will be limited to
20 km/h after switching the engine
off and on again.
Seek the assistance of a
workshop as soon as possible.
Illumination of control indicators Y
and A may be accompanied by a
warning chime.
Warning chimes 3 99.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.
144Driving and operatingAdBlue canisterNote
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.
Note
Since AdBlue has a limited
durability, check the date of expiry
before refilling.
1. Switch off engine and remove key
from ignition switch.
2. Open right-hand door and pull fuel
filler flap to open.3. Unscrew blue protective cap anticlockwise from the filler neck.
4. Open AdBlue canister.
5. Mount one end of the hose on the
canister and screw the other end
on the filler neck.
6. Lift the canister until it is empty, or
until the flow from the canister has stopped. This can take up to five
minutes.
7. Place the canister on the ground to empty the hose, wait 15
seconds.
8. Unscrew the hose from the filler neck.
9. Mount the protective cap and turn
clockwise until it engages.
10. Close filler flap and right-hand door.
Note
Dispose of AdBlue canister
according to environmental
requirements. Hose can be reused
after flushing with clear water before
AdBlue dries out.Note
Allow the vehicle to idle for at least
ten seconds to allow the system to
detect the AdBlue refill.
Failure to observe this procedure will
result in the system only recognising the AdBlue refill after approx.
20 minutes of driving.
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.
Filler cap
Only use genuine filler caps. AdBlue tank has a special filler cap.
Fault
If the system detects an operating
fault, control indicator Õ illuminates
together with A and a warning
chime. Seek the assistance of a
workshop immediately.
Depending on version, a
corresponding message may also
appear in the Driver Information
Centre 3 98.