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148Driving and operatingNote
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 volume of at least ten litres of AdBlue(depending on AdBlue
consumption).
Avoid minor top-ups (e.g. less than
ten litres), 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 3 245.
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.
Page 151 of 261

Driving and operating149AdBlue 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 3 102.
Page 168 of 261

166Driving and operatingInfotainment system display screen
In vehicles with Navigation system,
the rear view camera display is shown
on the Infotainment system display
screen.
Trajectory lane display image (1)
Depending on version, the trajectory
lane (1) of the vehicle is shown in blue
on the Info-Display. It shows the path of the vehicle in accordance with the
steering angle.
Fixed lane display image (2)
The fixed lane display (2) shows the
path of the vehicle if the wheels are
kept straight.
Guide lines (3, 4, 5) are used together
with the fixed lane display (2) and indicate the distance behind the
vehicle.The guide line intervals are as
follows:3 (red):30 cm4 (yellow):70 cm5 (green):150 cmSettings
Settings, e.g. brightness, can be set
via the Infotainment system. Refer to
Infotainment manual for further
information.
Deactivation
The camera is deactivated after a
delay if reverse gear is not engaged.
Fault
The rear view camera may not
operate properly when:
● the surrounding is dark
● the sun or the beam of headlights
is shining directly into the camera lens
● ice, snow, mud, or anything else covers the camera lens. Clean
the lens, rinse it with water, and
wipe it with a soft cloth
Page 225 of 261

Service and maintenance223Dexos is the newest engine oil quality
that provides optimum protection for
diesel engines. If it is unavailable,
engine oils of other listed qualities
must be used.
Select the appropriate engine oil
based on its quality and on the
minimum ambient temperature
3 226.
Topping up engine oil
Engine oils of different manufacturers
and brands can be mixed as long as
they comply with the required engine
oil quality and viscosity.
Use of engine oil with only
ACEA A1/B1 or only A5/B5 quality is
prohibited, since it can cause long-
term engine damage under certain
operating conditions.
Select the appropriate engine oil
based on its quality and on the
minimum ambient temperature
3 226.
Additional engine oil additives
The use of additional engine oil
additives could cause damage and
invalidate the warranty.Engine oil viscosity grades
The SAE viscosity grade gives
information of the thickness of the oil.
Multigrade oil is indicated by two
figures, e.g. SAE 5W-30. The first
figure, followed by a W, indicates the
low temperature viscosity and the
second figure the high temperature viscosity.
Select the appropriate viscosity grade depending on the minimum ambient
temperature 3 226.
All of the recommended viscosity
grades are suitable for high ambient
temperatures.
Coolant and antifreeze
Use only silicate-free long life coolant (LLC) antifreeze approved for thevehicle. Consult a workshop.
The system is factory filled with
coolant designed for excellent
corrosion protection and frost
protection down to approx. -28 °C.
This concentration should be
maintained all year round. The use of
additional coolant additives that
intend to give additional corrosionprotection or seal against minor leaks
can cause function problems. Liability for consequences resulting from the
use of additional coolant additives will
be rejected.
Washer fluid
Use only washer fluid approved for
the vehicle to prevent damage of wiper blades, paintwork, plastic and
rubber parts. Consult a workshop.
Brake fluid
Over time, brake fluid absorbs
moisture which will reduce braking
effectiveness. The brake fluid should therefore be replaced at the specified interval.
AdBlue Only use AdBlue to reduce the
nitrogen oxides in the exhaust
emission 3 143.
Page 229 of 261
Technical data227Engine data
Sales designation
2.3 CDTI 1252.3 CDTI 110,
2.3 CDTI 110
ecoFLEX2.3 CDTI
BITURBO 1352.3 CDTI 1502.3 BITURBO 163Engine identifier codeM9T (MH) 1)
, (MD) 2)
,
(MJ) 2)M9T (MR) 2)M9T (MN)2)M9T (MF)2)M9T (MP) 3)
, (MU) 4)Number of cylinders44444Piston displacement
[cm 3
]22982298229822982298Engine power [kW]9281100110120at rpm35003500350035003500Torque [Nm]310285340/350 5)3503603)
/380 4)at rpm1250-20001250-20001500-250015001500-2750Fuel typeDieselDieselDieselDieselDiesel1)
Euro 4.
2) Euro 5.
3) Euro 5.
4) Euro VI with AdBlue.
5) Front-wheel drive/Rear-wheel drive.
Page 230 of 261
228Technical dataSales designation2.3 CDTI 1102.3 CDTI 1302.3 BITURBO 1302.3 BITURBO 1452.3 BITURBO 170Engine identifier codeM9T (MW)6)M9T (MY)6)M9T (M1)7)M9T (MS) 6)
, (MT) 7)M9T (ML) 6)Number of cylinders44444Piston displacement [cm 3
]22982298229822982298Engine power [kW] (PS)819696107125at rpm35003500350035003500Torque [Nm]290320330360380at rpm1250150015001500-27501500-2750Fuel typeDieselDieselDieselDieselDiesel6) Euro 6 with AdBlue.
7) Euro VI with AdBlue.
AdBlue 3
143.
Page 247 of 261
Technical data245Capacities
Engine oilEngineM9TEngine oil including filter [l] (approx.)8.0 Front-wheel drive
8.9 Rear-wheel drivebetween MIN and MAX [l] (approx.)1.5 - 2.0
Fuel tank
Fuel tank, nominal capacity [l]80 or 105
AdBlue tank
AdBlue, nominal capacity [l]22.5
Page 252 of 261

250Customer informationCollision damage repairPaint thicknessDue to production techniques, the
thickness of the paint can vary
between 50 and 400 µm.
Therefore, different paint thickness is
no indicator for a collision damage
repair.
Registered trademarksApple Inc.
Apple CarPlay™ is a trademark of
Apple Inc.
App Store ®
and iTunes Store ®
are
registered trademarks of Apple Inc.
iPhone ®
, iPod ®
, iPod touch ®
, iPod
nano ®
, iPad ®
and Siri ®
are registered
trademarks of Apple Inc.Aupeo! GmbH
AUPEO ®
is a registered trademark of
the Aupeo! GmbH.Bluetooth SIG, Inc.
Bluetooth ®
is a registered trademark
of Bluetooth SIG, Inc.DivX, LLC
DivX ®
and DivX Certified ®
are
registered trademarks of DivX, LLC.EnGIS Technologies, Inc.
BringGo ®
is a registered trademark of
EnGIS Technologies, Inc.Google Inc.
Android™ and Google Play™ Store are trademarks of Google Inc.Stitcher Inc.
Stitcher™ is a trademark of Stitcher,
Inc.Verband der Automobilindustrie e.V.
AdBlue ®
is a registered trademark of
the VDA.Vehicle data recording
and privacy
Event data recorders
Data storage modules in the
vehicle
A large number of electronic
components of your vehicle contain
data storage modules temporarily or
permanently storing technical data
about the condition of the vehicle,
events and errors. In general, this
technical information documents the
condition of parts, modules, systems
or the environment:
● Operating conditions of system components (e.g. filling levels).
● Status messages of the vehicle and its single components (e.g.
number of wheel revolutions /
rotational speed, deceleration,
lateral acceleration).
● Dysfunctions and defects in important system components.