
Wear suitable footwear to ensure correct
usage of the pedals.
X Secure the load as per the loading guide-
lines (Y page 240).
X Make sure that the floormats and carpets
are properly secured so that they cannot
slip and obstruct the pedals.
X Close all doors. Starting the engine
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
! Do not depress the accelerator pedal
when starting the engine.
X Before starting the engine, make sure that:
R all the doors are closed.
R all the vehicle occupants are wearing
their seat belts correctly.
R the parking brake is applied.
i If you depress the brake pedal before
starting the engine, the pedal travel is short
and pedal resistance is high.
If you depress the brake pedal again after
starting the engine, pedal travel and resist-
ance will be back to normal again. Gearshift pattern
005D
Park position with parking lock
005E Reverse gear
005C Neutral
005B Drive
X Move the selector lever to position P.
The display in the instrument cluster shows
P:
R on vehicles with steering wheel buttons
(Y page 187)
R on vehicles without steering wheel but-
tons (Y page 182)
i You can also start the engine in neutral
N.
X Turn the key to position 2in the ignition
lock.
The 0028 preglow indicator lamp in the
instrument cluster lights up briefly.
X Once the 0028preglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is running.
i You can start the engine without preglow
when the engine is warm.
The preglow system is malfunctioning if the
0028 preglow indicator lamp lights up for
approximately 1 minute:
R after the ignition is switched on
R while the engine is running
At extremely low outside temperatures you
may then no longer be able to start the
engine. Have the malfunction rectified at a qualified specialist workshop. Driving
139Driving and parking Z

X
Turn fuel filler cap 0044counter-clockwise,
remove it and let it hang from strap 0043.
X Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
X Only fill the tank until the pump nozzle
switches off. Fuel may otherwise leak out.
X Replace tank filler cap 0044on tank and turn
clockwise.
You will hear a click when the fuel filler cap
is closed fully.
X Open the front left-hand door first, and then
close the filler flap. Problems with the fuel and fuel tank
If your vehicle is losing fuel, the fuel lines or
the fuel tank are defective.
X Turn the key to position 0in the ignition
lock immediately and remove it.
X Do not restart the engine under any cir-
cumstances.
X Consult a qualified specialist workshop.
If the fuel tank has been run dry, after refuel-
ing carry out the following steps:
X Before starting the engine: switch on the
ignition three or four times.
X Turn the key to position 2in the ignition
lock (Y page 138).
The 0028 preglow indicator lamp in the
instrument cluster lights up briefly.
X Once the 0028preglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is running.
You can start the diesel engine without pre-
glow when the engine is warm. Diesel Exhaust Fluid (DEF)
Important safety notes H
Environmental note
Dispose of DEF in an environmentally respon- sible manner.
! Only use DEF in accordance with
ISO 22241. Never mix DEF with additives or
thin it with tap water. The exhaust gas after- treatment may otherwise be damaged.
Observe the MB Specifications for Service
Products, Sheet 352.0.
Damage that results from the use of addi-
tives or tap water leads to the loss of the
New Vehicle Limited Warranty.
! If DEF comes into contact with a painted
or aluminum surface, wash the surface off
immediately with plenty of water.
! DEF is not a diesel additive and must not
be mixed with fuel in the tank. Even small
amounts of DEF can cause engine damage.
Damage that results from the blending of
DEF will not be covered by the New Vehicle Limited Warranty.
The exhaust gas aftertreatment requires a
reducing agent, Diesel Exhaust Fluid (DEF), in order to function correctly.
When opening the DEF tank filler cap at high
outside temperatures, ammonia vapors may
escape.
Ammonia vapors have a pungent smell and
primarily cause irritation of the:
R skin
R mucous membranes
R eyes
You may experience a burning sensation in
your eyes, nose and throat, as well as cough- ing and watering of the eyes.
Do not inhale ammonia vapors. Avoid contact
with DEF.
Do not allow DEF to come into direct contact with your skin; it is hazardous to your health. Refueling
147Driving and parking Z

Parking brake
G
WARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the automatic transmission out of the
parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
If you must brake the vehicle with the parking brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the vehi- cle when the service brake is faulty. Do not
apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again. The brake lamps are not illuminated when you
brake the vehicle using the parking brake.
As a rule, you may only apply the parking
brake when the vehicle is stationary. X
To apply the parking brake: pull brake
lever 0043up as far as the last possible
detent.
The 0066 warning lamp in the instrument
cluster lights up if the engine is running.
i On vehicles with a folding brake lever, you
can then press lever 0043down to the stop.
X To release the parking brake: on vehicles
with a folding brake lever, first pull brake
lever 0043up to the stop.
X Raise brake lever 0043slightly and press
release knob 0044.
X Guide brake lever 0043down to the stop.
The 0066 indicator lamp in the instrument
cluster goes out.
Exceptionally, if the service brake fails, the
parking brake can be used to brake the vehi- cle in an emergency.
X Emergency braking: press and hold
release button 0044and carefully apply brake
lever 0043. Switching off the engine
G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
! If the coolant temperature is very high,
e.g. after driving on hilly roads, leave the
engine running at idle speed for about
two minutes before turning it off.
This allows the coolant temperature to
return to normal.
X Stop the vehicle.
X Shift the automatic transmission to posi-
tion P. 150
ParkingDriving and parking

Activation conditions
To activate cruise control, all of the following
activation conditions must be fulfilled:
R the parking brake must be released. The
0066 indicator lamp in the instrument clus-
ter is off
R you are driving faster than 20 mph
(30 km/h)
R neither the brake or clutch pedal is
depressed
i Other drive and brake systems not descri-
bed in this Operator's Manual, such as a
retarder, may affect cruise control. You can
find information on this in the separate
operating instructions provided by the
body manufacturer.
Storing and maintaining the current
speed X
Accelerate the vehicle to the desired speed
above 20 mph (30 km/h).
X Briefly push the cruise control lever up 0043
or down 0087.
X Release the accelerator pedal.
Cruise control is activated. The current
speed is stored.
Setting the speed It may be a moment before the vehicle starts
to accelerate or brake to the set speed. Take
this delay into account when setting the
speed.
X Briefly push the cruise control lever up 0043
to increase the speed or down 0087to reduce
the speed.
The last stored speed increases or decrea- ses in 1 mph increments (1 km/h incre-
ments).
or
X Press and hold the cruise control lever
up 0043 or down 0087until the desired speed
has been reached. X
Release the cruise control lever.
The current speed is stored.
i Cruise control is not deactivated if you
depress the accelerator pedal. If you accel- erate briefly to overtake, for example,
cruise control resumes the vehicle’s speed
to the last speed stored after you have fin- ished overtaking.
Deactivating cruise control There are various ways to deactivate cruise
control:
X Briefly press the cruise control lever for-
wards 0085.
or
X Apply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off
the engine.
Cruise control is deactivated automatically
when: R you apply the brakes
R you apply the parking brake and the 0066
indicator lamp in the instrument cluster
lights up
R you are driving slower than 20 mph
(30 km/h)
R you shift the automatic transmission to
neutral position Nwhile the vehicle is in
motion
R ESP ®
or ASR intervenes
R there is a malfunction in the ESP ®
, ASR or
ABS system 160
Driving systemsDriving and parking

Up to a speed of about 45 mph (70 km/h), the
distance warning function can also react to
stationary obstacles, such as stopped or
parked vehicles.
If you approach an obstacle and the distance
warning function detects a risk of a collision,
the system will alert you both visually and
acoustically.
In particular, the detection of obstacles can
be impaired in the case of:
R there is dirt on the sensors or anything else
covering the sensors
R it is snowing or raining heavily
R there is interference from other radar sour-
ces
R there are strong radar reflections, for
example in parking garages
R a narrow vehicle traveling in front, e.g. a
motorbike
R a vehicle traveling in front on a different line
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensor checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at slow speeds where there is no visible
damage to the front of the vehicle.
Activating/deactivating the distance
warning function
When you switch on the engine, the distance
warning function switches on after a few sec-
onds.
X To deactivate: press the00D4button
(Y page 37).
Vehicles without steering wheel but-
tons: the00C7 warning lamp in the instru-
ment cluster lights up and the OFF
OFF message
flashes.
Vehicles with steering wheel buttons:
the 00C7 warning lamp in the instrument cluster lights up and the
Distance Warn‐ Distance Warn‐
ing Deactivated
ing Deactivated message appears.
X To activate: press the00D4button again
(Y page 37).
Vehicles without steering wheel but-
tons: the00C7 warning lamp in the instru-
ment cluster goes out and the ON
ON message
flashes.
Vehicles with steering wheel buttons:
the 00C7 warning lamp in the instrument
cluster goes out and the Distance Warn‐ Distance Warn‐
ing Activated
ing Activated message appears in the
multifunction display.
Adaptive Brake Assist i
Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 57). G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
R intervene unnecessarily
R not intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation. G
WARNING
Adaptive Brake Assist does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R to stationary obstacles
R when cornering
As a result, the Adaptive Brake Assist may not intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. 162
Driving systemsDriving and parking

0043
Yellow indicator lamp/red warning lamp
If yellow indicator lamp 0043lights up:
R you are driving at less than 20 mph
(30 km/h)
R Blind Spot Assist is deactivated
R Blind Spot Assist is malfunctioning
R there is no clear warning, depending on the
situation
Blind Spot Assist is active from a speed of
20 mph (30 km/h). If a vehicle is detected in
the blind spot monitoring range, red warning
lamp 0043on the corresponding side lights up.
This warning occurs when a vehicle enters the blind spot monitoring range from behind or
from the side. When you overtake a vehicle,
the warning only occurs if the difference in
speed is less than 14 mph (22 km/h).
Yellow indicator lamp 0043goes out if reverse
gear is engaged. Blind Spot Assist is then
deactivated.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light.
Collision warning
If a vehicle is detected in the monitoring range of Blind Spot Assist and you switch on the
corresponding turn signal, a double warning
tone sounds once. Red warning lamp 0043
flashes. If the turn signal remains on, detec-
ted vehicles are indicated by the flashing of
red warning lamp 0043. There are no further
warning tones. Activating/deactivating Blind Spot Assist
i Blind Spot Assist is activated when you
switch on the ignition.
X Turn the key to position 2in the ignition
lock.
Warning lamps 0043in the exterior mirrors
light up red for approximately 1.5 seconds
and then turn yellow.
X To deactivate: press the button in
the center console (Y page 37).
The yellow indicator lamp in exterior mir-
ror 0043first flashes and then lights up con-
tinuously.
X To activate: press the button in the
center console again (Y page 37).
The yellow indicator lamp in exterior mir-
ror 0043flashes initially. If you exceed
20 mph (30 km/h) while driving, the yellow
indicator lamp in exterior mirror 0043goes
out.
Towing a trailer
If you attach a trailer, make sure that you have
correctly established the electrical connec-
tion. This can be accomplished by checking
the trailer lighting. Blind Spot Assist is deac-
tivated as a result. The indicator lamp in the
exterior mirrors lights up yellow.
On vehicles with steering wheel buttons, the
Blind Spot Assist Deactivated
Blind Spot Assist Deactivated mes-
sage also appears in the display.
Lane Keeping Assist General notes
Lane Keeping Assist monitors the area in
front of your vehicle by means of a camera at
the top of the windshield. Lane Keeping Assist detects lane markings on the road and warns you before you leave your lane unintention-
ally. Driving systems
165Driving and parking Z

0043
Lane Keeping Assist camera
Lane Keeping Assist supports you from
speeds of approximately 40 mph(60 km/h).
Important safety notes G
WARNING
Lane Keeping Assist may not always clearly
recognize lane markings.
In this case, Lane Keeping Assist may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay particular attention to the traffic
situation and stay in lane, in particular if
warned by Lane Keeping Assist. G
WARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There is a risk of an accident.
You should always steer, brake or accelerate
yourself, in particular if warned by Lane Keep-ing Assist.
If you fail to adapt your driving style, Lane
Keeping Assist can neither reduce the risk of
accident nor override the laws of physics.
Lane Keeping Assist cannot take into account road, weather or traffic conditions. Lane
Keeping Assist is only an aid. You are respon-
sible for the distance to the vehicle in front,
for vehicle speed, braking in good time and for
staying in your lane.
Lane Keeping Assist does not keep your vehi- cle in its lane. The system may be impaired or may not func-
tion if:
R if the vehicle is incorrectly loaded
(Y page 240)
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflection from other vehicles
(e.g. if the road surface is wet)
R the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R no, or several, unclear lane markings are
present for one lane, e.g. in a construction
area
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shade conditions
on the road
A warning may be given if a front wheel
passes over a lane marking. In addition, a
warning tone sounds and the 00B0indicator
lamp in the instrument cluster lights up.
Activating/deactivating Lane Keeping
Assist
Lane Keeping Assist is automatically activa-
ted when you start the engine.
X To deactivate: press thejbutton in
the center console (Y page 37).
On vehicles without steering wheel but-
tons:
OFF
OFF flashes briefly in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then lights up continuously.
On vehicles with steering wheel but-
tons: 166
Driving systemsDriving and parking

The
Lane Keep. Assist Deactivated
Lane Keep. Assist Deactivated
message appears in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then lights up continuously.
Lane Keeping Assist is deactivated.
X To activate: press thejbutton in the
center console again (Y page 37).
On vehicles without steering wheel but-
tons:
ON ON flashes briefly in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then goes out.
On vehicles with steering wheel but-
tons:
The Lane Lane Keep.
Keep. Assist
Assist Activated
Activated mes-
sage appears in the display and the 00B0
indicator lamp in the instrument cluster
flashes and then goes out.
Lane Keeping Assist is activated.
A Lane Keeping Assist warning is suppressed if:
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you have set the turn signal and a lane
change is detected. In this case, the warn-
ings are suppressed for a certain period of
time.
R you accelerate hard, e.g. kickdown on vehi-
cles with an automatic transmission.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane marking, the system recognizes certain con-
ditions and warns you accordingly.
Lane Keeping Assist warns you earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a free-
way.
R the system recognizes solid lane markings. Warnings are given later if:
R the road has narrow lanes.
R you cut the corner on a bend. PARKTRONIC
General notes PARKTRONIC is an electronic parking aid. The
system is equipped with ultrasonic sensors inthe front and rear bumpers to monitor the
area around your vehicle. PARKTRONIC indi-
cates visually and audibly the distance
between your vehicle and an object.
Your vehicle features two separate sound
emitters with different frequencies for the
warning tones. The warning ranges in front of
and behind the vehicle are indicated by dif-
ferent warning tones.
PARKTRONIC is activated automatically when you:
R turn the key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h) . PARKTRONIC is reactiva-
ted at speeds below 10 mph (16 km/h).
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate sur-
roundings. You are responsible for safe
maneuvering, parking and pulling away. Whenmaneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuvering area.
! Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects. Driving systems
167Driving and parking Z