
Instruments and controls109Digital speedDigital display of the instantaneous
speed.
Settings Press and hold one of the buttons on
end of wiper lever for approx.
5 seconds to select the display
language.
AdBlue range The AdBlue range is calculated from
the current contents of the AdBlue
tank and the average AdBlue
consumption 3 234.
Interruption of power supply
If the power supply has been
interrupted or if the vehicle battery
voltage has dropped too low, the
values stored in the trip computer will be lost.Tachograph
The tachograph is operated as
described in the operating
instructions supplied. Observe
regulations regarding use.

224Driving and operatingDriving and
operatingDriving hints ............................... 225
Driving economically ...............225
Control of the vehicle ...............225
Steering ................................... 225
Starting and operating ...............226
New vehicle running-in ............226
Ignition switch positions ...........226
Starting the engine ..................227
Idle speed control ....................228
Overrun cut-off ........................ 228
Stop-start system ....................228
Parking .................................... 231
Air suspension ......................... 231
Engine exhaust .......................... 233
Diesel particle filter ..................233
Catalytic converter ...................234
AdBlue ..................................... 234
Manual transmission ..................241
Manual transmission automa‐ ted .............................................. 241
Transmission display ...............241
Starting the engine ..................242
Selector lever .......................... 242Manual mode........................... 243
Electronic driving programmes 243
Fault ........................................ 244
Interruption of power supply ....244
Brakes ........................................ 244
Antilock brake system .............244
Parking brake .......................... 245
Brake assist ............................. 246
Hill start assist ......................... 246
Ride control systems .................247
Traction Control system ..........247
Electronic Stability Control ......248
Limited-slip rear axle ...............249
Driver assistance systems .........249
Cruise control .......................... 249
Speed limiter ........................... 251
Active emergency braking .......253
Parking assist .......................... 255
Side blind spot alert .................257
Rear view camera ...................259
Lane departure warning ..........261
Fuel ............................................ 262
Fuel for diesel engines ............262
Refuelling ................................ 263
Trailer hitch ................................ 265
General information .................265
Driving characteristics and towing tips .............................. 265
Trailer towing ........................... 265Towing equipment ...................266
Trailer stability assist ...............266
Auxiliary features .......................266
Power take-off ......................... 266

234Driving and operatingconditions. Autostop is not available
and fuel consumption may be higher
during this period. The emission of
smells and smoke during this process is normal.
Under certain driving conditions, e.g.
short distances, the system cannot
clean itself automatically.
If cleaning of the filter is required and
if previous driving conditions did not
enable automatic cleaning, it will be
indicated by illumination of control
indicator j 3 99. Seek the
assistance of a workshop
immediately.Caution
If the cleaning process is
interrupted, there is a risk of
provoking severe engine damage.
Cleaning takes place quickest at high engine speeds and loads.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.
Caution
Fuel grades other than those listed on page 3 262 could damage the
catalytic converter or electronic
components.
Unburnt fuel 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.
If control indicator Z flashes, the
permitted emission limits may be
exceeded. Lift your foot off the
accelerator until Z stops flashing and
is steadily illuminated. Contact a
workshop immediately.
Malfunction indicator light 3 99.
AdBlue
General information The selective catalytic reduction 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.

Driving and operating235Caution
Avoid contact of the paintwork withAdBlue.
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.
3.5 l per 1000 km and depends on the
driving behaviour.
AdBlue gauge 3 93.
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 3 105.
Additionally, control indicator ú
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.Warning stages: level warnings,
engine restarts prevented 1. The warning message TOP UP
ADBLUE is displayed after the
ignition is switched on and the
range is less than 2400 km.
Driving is possible without any
restrictions.
Refill the AdBlue tank soon.
2. ú illuminates and the warning
message TOP UP ADBLUE is
displayed after the ignition is
switched on and the range is less
than 1500 or 1200 km.
Refill the AdBlue tank soon.
3. ú illuminates and the warning
message XXXX KM FAILURE
TOP UP ADBLUE is displayed

236Driving and operatingafter the ignition is switched on
and the range is less than 1000 or
800 km. The message is repeated
every 100 km. When the range is less than 200 km the message is
repeated every 50 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.
Refill the tank completely or with a volume of at least 10 l of AdBlue
(depending on AdBlue
consumption) as soon as
possible.
4. Y illuminates during driving with
warning message 0KM FAILURE
TOP UP 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 10 l of AdBlue (depending on AdBlue consumption) as soon as
possible.
Illumination of control indicator Y may
be accompanied by a warning chime.Warning chimes 3 107.High emission warnings
If the exhaust emission rises above a certain value, warnings similar to therange warnings as described above
will be displayed in the Driver
Information Centre. Control indicator
ú illuminates continuously together
with j 3 99 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.
Seek the assistance of a workshop as
soon as possible.Warning stages: high emission
warnings 1. ú and j illuminate with
warning message Check Anti-
Pollution System .
Fault in the system that may result in a loss of engine power.Seek the assistance of a
workshop as soon as possible.
2. ú and j illuminate with
warning message xxxKM failure
antipollution .
Indicates that in less than 1000 or 800 km an engine restart will be
prohibited after switching off the
ignition. This warning message
will be repeated every 100 km.
When the range is less than 200
km the message is repeated
every 50 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. ú and j illuminate with
warning message 0KM failure
antipollution .
The engine cannot be restarted
after switching off the ignition.
Seek the assistance of a
workshop.

Driving and operating237Illumination of control indicators ú
and j may be accompanied by a
warning chime.
Warning chimes 3 107.
Version without level warnings in the Driver Information Centre
When the AdBlue gauge shows the
level is very low, control indicator ú
first illuminates continuously, then as
AdBlue level drops to a certain
amount ú 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.
Note
These restrictions are a legal
requirement.Warning stages: level warnings,
engine power loss
1. Range A. No control indicator:
Driving is possible without any
restrictions.
2. Range B. Control indicator ú
illuminates:
Refill the AdBlue tank as soon as
possible.
3. Range C. Control indicator ú
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 ú
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 10 l of AdBlue
(depending on AdBlue
consumption) as soon as
possible.
5. Range E. Tank is empty and ú
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 10 l of AdBlue (depending on AdBlue

238Driving and operatingconsumption) as soon as
possible.
High emission warnings If the exhaust emission rises above a
certain value, control indicator ú
illuminates together with j 3 99.
Consult a workshop as soon as
possible.
Note
These restrictions are a legal
requirement.Warning stages: high emission
warnings 1. ú and j illuminate:
Fault in the system. Seek the assistance of a
workshop as soon as possible.
2. ú and j 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. ú and j 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 ú
and j may be accompanied by a
warning chime.
Warning chimes 3 107.
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.
Note
If AdBlue must be refilled at very low temperatures, 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.
Note
If engine starting is prohibited due to low AdBlue level, we recommend
refilling the tank completely or with a

Driving and operating239volume of at least 10 l of AdBlue
(depending on AdBlue
consumption).
Avoid minor top-ups (e.g. less than
10 l), otherwise the system may not
detect a refill.
Note
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 filler flap located on the
right-hand side of the vehicle.
The filler flap can only be opened if
the vehicle is unlocked and the right- hand door is opened.9 Danger
Vehicles with stop-start system:
The engine must be switched off
and the ignition key removed, to
avoid risk of engine being
restarted automatically by the
system.
Capacities 3 317.
Filling station
9 Danger
Follow the operating and safety
instructions of the filling station
when refilling AdBlue.
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. Fully insert the pump nozzle into the filler neck and switch it on.
5. When refilling is complete, mount the protective cap and turn
clockwise until it engages.
6. Close filler flap and right-hand door.
AdBlue canister Note
Only use the designated AdBlue canisters for refilling, to prevent a
topping-up of too much AdBlue.