
Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
M
MSolutions The indicator lamp in the
¿ orÁ button
flashes three times or
remains off. The cooling
with air dehumidification
function cannot be acti-
vated. The cooling with air dehumidification function has been deactivated
due to a malfunction.
X Consult a qualified specialist workshop. Setting climate control to automatic
mode
General notes In automatic mode, the set temperature is main-
tained automatically at a constant level. The
system automatically regulates the temperature of the dispensed air, the airflow and the air dis- tribution.
The "Cooling with air dehumidification" function
is activated automatically in automatic mode.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using the Ãbutton.
Automatic control X
Turn the key to position 2in the ignition lock
(Y page 158).
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
X To switch to manual mode: press the_
button.
or X Press the IorK button.
The indicator lamp in the Ãbutton goes
out.
THERMOTRONIC automatic climate control:
when automatic mode is activated, you can
select a climate mode (Y page 141). Setting the climate mode
In automatic mode you can select the following
climate modes:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draught-free setting
X Turn the key to position 2in the ignition lock
(Y page 158).
X Press the Ãbutton.
X Press the ñbutton repeatedly until the
desired climate mode appears in the display. Setting the temperature
THERMATIC automatic climate control Different temperatures can be set for the driv-
er's and front-passenger sides.
X Turn the key to position 2in the ignition lock
(Y page 158).
X To increase or decrease: turn control:or
B anti-clockwise or clockwise (Y page 136).
Only change the temperature setting in small increments. Start at 22 †. Operating the climate control system
141Climate control

Flammable materials such as leaves, grass or
twigs may ignite if they come into contact
with:
R hot parts of the exhaust system
R the exhaust gas itself
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that:
R no flammable materials come into contact
with hot vehicle components
R the exhaust gas can escape from the
exhaust pipe unhindered
R the exhaust gas does not come into contact
with flammable materials.
The auxiliary heating is fitted under the front
wing on the left-hand side of the vehicle. The
emissions outlet is found behind the left front
wheel. ! Operating the auxiliary heating/ventilation
draws on the vehicle battery. After you have
heated or ventilated the vehicle a maximum of two times, drive for a longer distance.
Switch the auxiliary heating on regularly once a month for about ten minutes.
The auxiliary heating heats the air in the vehicle
interior to the set temperature. This occurs with- out using the heat of the running engine. The
auxiliary heating is operated directly using the
vehicle's fuel. For this reason, the tank content
must be at least at reserve fuel level to ensure
that the auxiliary heating functions.
The auxiliary heating or auxiliary ventilation
automatically adjusts to changes in tempera-
ture and weather conditions. For this reason,
the auxiliary heating could switch from ventila-
tion mode to heating mode or from heating
mode to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventilation
switches off when you turn the key to position 2
(Y page 158).
The auxiliary heating switches off automatically after 50 minutes. This time limit can be altered.
To do this, visit a qualified specialist workshop.
You cannot use the auxiliary ventilation to cool
the vehicle interior to a temperature lower than
the outside temperature. Before switching on X
Turn the key to position 2in the ignition lock
(Y page 158).
X Set the desired temperature.
The auxiliary heating/ventilation can be activa-
ted even when climate control is set to manual.
Optimum comfort can be attained when the sys-
tem is set to automatic mode. Set the temper-
ature to 22 †.
The auxiliary heating or auxiliary ventilation can
be switched on/off using the button on the
centre console or the remote control.
The on-board computer can be used to specify
up to three departure times, one of which may
be preselected (Y page 295).
Switching the auxiliary heating/venti-
lation on or off using the button on the
centre console General notes
The colours of the indicator lamps in button
:
mean the following:
R blue: auxiliary ventilation is switched on
R red: auxiliary heating is activated
R yellow: departure time is preselected
(Y page 295).
Switching on/off X To switch on the auxiliary heating or aux-
iliary ventilation:
press button:.
The red or blue indicator lamp in button :
lights up.
X To switch off the auxiliary heating or aux-
iliary ventilation: press button:.
The red or blue indicator lamp in button :
goes out. 150
Operating the climate control systemClimate control

A departure time has been
activated. The auxiliary
ventilation is currently
activated. The number in
the display shows the
remaining time (in
minutes) for the auxiliary
ventilation. If the vehicle is
not started after this time, the running time is
increased by five minutes. A departure time has been
activated. The auxiliary
heating is currently activa-
ted. The number in the dis- play shows the remaining
time (in minutes) for the
auxiliary heating. If the
vehicle is not started after
this time, the running time is increased by five
minutes. If the engine has not yet reached operating tem-
perature when it is started, the auxiliary heating running time is increased. The auxiliary heating
continues to run until the operating temperature
is reached. If this is the case, the ysymbol
appears in the remote control display and the
running time is zero minutes.
Setting the departure time
Make sure that the time set in the vehicle is
correct before setting the departure time (see
the separate operating instructions). Otherwise, the auxiliary heating may switch on at the wrong
time and at an unsuitable location. When setting the departure time, also observe the important
safety notes (Y page 149).
X Briefly press the ubutton.
X Press the ,or. button repeatedly
until the time to be changed appears in the
display.
X Press the uand^ buttons simultane-
ously.
The Îsymbol in the remote control display
flashes.
X Press the ,or. button to set the
desired departure time. i
The longer you press the
,or. but-
ton, the faster the time changes.
X Press the uand^ buttons simultane-
ously.
The new departure time is stored.
Activating the set departure time
X Briefly press the ubutton.
X Press the ,or. button repeatedly
until the desired departure time appears in
the display.
X Press the ubutton.
The Ísymbol, the departure time and,
depending on the selected departure time,
the letter A, BorCappear in the display.
Deactivating the set departure time
X Briefly press the ubutton.
The status of the auxiliary heating is shown in the display.
X Press the .button.
The first departure time stored appears in the
display.
X Press the ^button.
OFF is shown in the remote control display.
Replacing the remote control battery Important safety notes
G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an 152
Operating the climate control systemClimate control

Useful information
i This Owner's Manual describes all models,
series and optional equipment for your vehi-
cle that were available at the time of going to
press. National variations are possible. Note
that your vehicle may not be equipped with all
of the functions described. This is also the
case for systems and functions relevant to
safety.
i Read the information on qualified specialist
workshops: (Y page 28). Running-in notes
Important safety notes
In certain driving and driving safety systems, the
sensors adjust automatically while a certain dis- tance is being driven after the vehicle has beendelivered or after repairs. Full system effective-
ness is not reached until the end of this teach-in process.
Brake pads/linings and discs that are either new
or have been replaced only achieve optimum
braking effect after several hundred kilometres
of driving. Compensate for the reduced braking
effect by applying greater force to the brake
pedal. The first 1,500 km
If you treat the engine with sufficient care from
the very start, you will be rewarded with excel-
lent performance for the remainder of the
engine's life.
R Drive at varying vehicle speeds and engine
speeds for the first 1500 km.
R Avoid overstraining the vehicle during this
period, e.g. driving at full throttle.
R Change gear in good time, before the rev
counter needle is Ôof the way to the red area
of the rev counter.
R Do not shift down a gear manually in order to
brake.
R Try to avoid depressing the accelerator pedal
beyond the point of resistance (kickdown). Additional notes on running in Mercedes-AMG
vehicles:
R For the first 1,500 km do not drive at speeds
above 140 km/ h.
R Only allow the engine to reach a maximum
engine speed of 4,500 rpm briefly.
R Ideally, for the first 1,500 km, drive in the
Comfort drive program.
After 1,500 km, you may gradually accelerate
the vehicle to full road and engine speeds.
You should also observe these notes on running-
in if the engine or parts of the drive train on your vehicle have been replaced.
Always observe the maximum permissible
speed. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardises the oper-
ating and road safety of the vehicle. There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
Always fit the floormats securely and as pre-
scribed in order to ensure that there is always sufficient room for the pedals. Do not use
loose floormats and do not place several floor- mats on top of one another. G
WARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. Driving
157Driving and parking Z

Starting the vehicle
Important safety notes G
WARNING
If children are left unsupervised in the vehicle, they can:
R open doors and endanger other persons or
road users
R climb out and be injured by the traffic
R operate vehicle equipment and, for exam-
ple, trap themselves.
Children could also set the vehicle in motion, for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children. 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. G
WARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
! Do not depress the accelerator when start-
ing the engine. General notes Vehicles with a petrol engine:
the catalytic
converter is preheated for up to 30 seconds
after a cold start. The sound of the engine may
change during this time.
Automatic transmission X
Shift the transmission to position P
(Y page 168).
The transmission position indicator in the
multifunction display shows P(Y page 168).
i You can start the engine in transmission
position Pand N.
Starting procedure with the key X
To start a diesel engine: turn the key to
position 2in the ignition lock (Y page 158).
The % preglow indicator lamp in the instru-
ment cluster lights up.
X Turn the key to position 3in the ignition lock
(Y page 158) and release it as soon as the
engine is running.
i Vehicles with a diesel engine:
you can
start the engine without preglow if the engine
is warm.
Using KEYLESS-GO to start the engine The Start/Stop button can be used to start the
vehicle without inserting the key into the ignition
lock. The key must be in the vehicle and the
Start/Stop button must be inserted in the igni-
tion lock. This mode for starting the engine oper-
ates independently of the ECO start/stop auto- matic engine start function.
X Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button once
(Y page 158).
Vehicles with a petrol engine: the engine
starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts. 160
DrivingDriving and parking

Problem
Possible causes/consequences and
M
MSolutions The coolant temperature
display is showing more
than 120 †. The coolant warning lamp may also
be on and a warning tone
may sound. The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 376). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the radiator fan may be faulty. The cool-
ant is too hot and the engine is no longer being cooled sufficiently.
X If the coolant temperature is below 120 †, you can continue driving
to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-start traffic. DYNAMIC SELECT controller
This section describes the DYNAMIC SELECT
controller for all vehicles except PLUG-
IN HYBRID vehicles. Information on the
DYNAMIC SELECT controller on PLUG-
IN HYBRID vehicles (Y page 267).
Use the DYNAMIC SELECT controller to change
the drive program. Depending on the drive pro-
gram selected, the following vehicle character-
istics will change:
R the drive (engine and transmission manage-
ment)
R the transmission
R the suspension
R the steering
R the availability of the ECO start/stop function
If the ignition is switched off for less than four
hours, the previously selected drive program is
activated when the engine is next started. If the
ignition is switched off for more than four hours,
the Comfort drive program is activated when
the engine is next started. X
All vehicles (except Mercedes-AMG vehi-
cles):
turn DYNAMIC SELECT controller :as
many times as necessary until the desired
drive program is selected.
The selected drive program appears in the
multifunction display. After five seconds the
display goes out.
In addition, the current drive program settings are displayed in the multimedia system dis-
play.
Drive programs available (all vehicles
except Mercedes-AMG vehicles): Individual
Individual settings
Sport
Sporty driving characteris-
tics
Comfort
Comfortable and economi-
cal driving characteristics Slippery
Optimal driving characteris-
tics on slippery or snow-
covered roads 166
DYNAMIC SELECT controllerDriving and parking

Sport drive program
The
Sport drive program has the following char-
acteristics:
R sporty engine and transmission settings.
R the automatic transmission shifting up later.
As a result of the later automatic transmission
shift points, the fuel consumption possibly
being higher.
R the suspension exhibits sporty damping (vehi-
cles with AIRMATIC).
Drive program Sport Plus (Mercedes-
AMG vehicles) The
Sport Plus drive program has the following
characteristics:
R the vehicle exhibits particularly sporty driving
characteristics.
R the vehicle pulling away in first gear.
R the automatic transmission shifting up later.
As a result of the later automatic transmission
shift points, the fuel consumption possibly
being higher.
R the suspension exhibits particularly firm
springing and damping settings (vehicles with
AIRMATIC).
R the ECO start/stop function is deactivated, it
can, however, be activated again using the
ECO button (Y page 163).
Individual drive program In the
Individual drive program, the following
properties of the drive program can be selected:
R the drive (engine and transmission manage-
ment)
R the transmission
R the suspension
R all vehicles (except Mercedes-AMG vehicles):
the steering
R all vehicles (except Mercedes-AMG vehicles):
availability of the ECO start/stop function
To select the gears in the Individualdrive pro-
gram permanently using the steering wheel pad- dles, select the permanent manual gearshift
program.
Information about configuring the Individual
drive program with the multimedia system can
be found in the Digital Owner's Manual. Manual gearshifting
General notes You can change gear yourself using the steering
wheel gearshift paddles. The transmission must be in position D.
Depending on which gearshift paddle is pulled,
the automatic transmission immediately shifts
into the next gear up or down, if permitted.
To use manual shifting, you have two options:
R temporary setting
R permanent setting
If you activate manual gearshifting, the multi-
function display will show the current gear
instead of transmission position D.
If manual gearshifting is deactivated, the gears
will be selected automatically.
Temporary setting X
To activate: shift the DIRECT SELECT lever to
position D.
X Pull steering wheel gearshift paddle :or;.
Further information on activating manual gear-
shifting on PLUG-IN HYBRID vehicles
(Y page 267).
Temporary setting will be active for a certain
amount of time. Under certain conditions the
minimum amount of time is extended, e.g. in the case of lateral acceleration, during an overrun
phase or when driving on steep terrain.
X To deactivate: pull steering wheel gearshift
paddle ;and hold it in place.
or X Use the DIRECT SELECT lever to shift the
transmission position. 172
Automatic transmissionDriving and parking

AdBlue
®
(BlueTEC vehicles only)
General notes To function properly, BlueTEC exhaust gas after-
treatment must be operated with the reducing
agent AdBlue ®
. Topping up AdBlue ®
is part of
the maintenance work. Under normal operating
conditions, a full tank of AdBlue ®
should last
until the next service due date.
When the supply of AdBlue ®
is down to approx-
imately 3.8 l, the Refill AdBlue See Own‐
Refill AdBlue See Own‐
er's Manual er's Manual message is shown in the multi-
function display.
X Add at least 3.8 l of AdBlue ®
.
X Switch on the ignition for at least 60 seconds.
X Start the engine.
i You can also have the AdBlue ®
tank refilled
at a qualified specialist workshop.
Before driving your vehicle outside Europe, have
the AdBlue ®
supply checked at a qualified spe-
cialist workshop.
Further information about BlueTEC exhaust gas
aftertreatment and about AdBlue ®
can
be obtained from any Mercedes-Benz Service
Centre.
Important safety notes AdBlue
®
is a water-soluble fluid for the exhaust
gas aftertreatment of diesel engines. It is:
R non-toxic
R colourless and odourless
R non-flammable
If you open the AdBlue ®
tank, small amounts of
ammonia vapour may be released.
Ammonia vapours have a pungent odour and are
particularly irritating to the skin, to mucous
membranes and to the eyes. You may experi-
ence a burning sensation in your eyes, nose and throat. You may also experience coughing and
watery eyes.
Do not inhale any ammonia vapours that may be
released. Only fill the AdBlue ®
tank in well-ven-
tilated areas.
Do not swallow AdBlue ®
or let it come into con-
tact with skin, eyes or clothing. Keep AdBlue ®
away from children. If you or others come into contact with AdBlue
®
,
observe the following:
R immediately rinse AdBlue ®
off your skin with
soap and water.
R if AdBlue ®
comes into contact with your eyes,
immediately rinse them thoroughly with clean water. Seek medical attention immediately.
R if AdBlue ®
is swallowed, immediately rinse
your mouth out thoroughly. Drink plenty of
water. Seek medical attention immediately.
R change immediately out of clothing that has
come into contact with AdBlue ®
.
! Only use AdBlue ®
in accordance with
ISO 22241. Do not mix any additives with
AdBlue ®
, and do not dilute AdBlue ®
with
water. This may destroy the BlueTEC exhaust
gas aftertreatment system.
! In order to fill the AdBlue ®
tank, the vehicle
must be parked on a level surface. The
AdBlue ®
tank can only be filled as intended
with the vehicle parked on a level surface.
Fluctuations in capacity will thus be avoided.
Filling a vehicle standing on an uneven sur-
face is not permitted. There is a danger of
overfilling, which can cause damage to Blue-
TEC exhaust gas aftertreatment components.
! Surfaces which have come into contact with
AdBlue ®
while refilling should be rinsed
immediately with water, or remove AdBlue ®
with a moist cloth and cold water. If AdBlue ®
has already crystallised, use a sponge and
cold water to clean the area. AdBlue ®
residue
crystallises after a certain amount of time and soils the affected surfaces.
! AdBlue ®
is not a fuel additive and must not
be added to the fuel tank. If AdBlue ®
is added
to the fuel tank, this can lead to engine dam-
age.
Have the AdBlue ®
tank refilled at a qualified
specialist workshop. However, you can also top
up the AdBlue ®
tank:
R at a filling station with an AdBlue ®
filling pump
R with AdBlue ®
refill bottles
R with an AdBlue ®
refill canister
When the pump nozzle switches off automati-
cally during filling at a filling pump, the AdBlue ®
tank has been completely filled. Do not fill the 180
RefuellingDriving and pa
rking