Setting the air distribution
X
Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X Dual-zone automatic climate control: press
air distribution adjustment button Fup or
down, until the desired symbol appears in
the display (Y page 145).
X 3-zone automatic climate control: press air
distribution adjustment button Iup or
down, until the desired symbol appears in
the display (Y page 147). Setting the airflow
Dual-zone automatic climate control X
Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X To increase/reduce: press airflow switch
G up or down (Y page 145).
3-zone automatic climate control X
Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X To increase/reduce front-
compartment airflow: press airflow
switch Hup or down (Y page 147).
X To increase/reduce the rear airflow:
press the KorI switch.
If the battery is not sufficiently charged,
blower output may be reduced. As soon as
the battery is sufficiently charged, full blower
output will be available. Switching the ZONE function on/off
X To activate: press theábutton.
The indicator lamp above the ábutton
lights up.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side. 3-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side
and the rear compartment.
X To deactivate: press theábutton.
The indicator lamp above the ábutton
goes out.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
3-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side and
the rear compartment. Defrosting the windshield
You can use this function to defrost the
windshield or to defrost the inside of the
windshield and the side windows.
Switch off the "Windshield defrosting"
function as soon as the windshield is clear
again.
X Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X To activate: press the¬button.
The indicator lamp above the ¬button
lights up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
If the battery is not sufficiently charged,
blower output may be reduced. Once the
battery is sufficiently charged again, full
blower output will be available again.
X To deactivate: press the¬button.
The indicator lamp above the ¬button
goes out. The previously selected settings 152
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are restored. Air-recirculation mode
remains deactivated.
or
X Press the Ãbutton.
The indicator lamp above the ¬button
goes out. Airflow and air distribution are set
to automatic mode.
or
X Dual-zone automatic climate control: press
temperature selection switch EorH up
or down (Y page 145).
3-zone automatic climate control: press
temperature selection switch ForJ up
or down (Y page 147).
or
X Dual-zone automatic climate control: press
airflow switch Gup or down
(Y page 145).
3-zone automatic climate control: press
airflow switch Hup or down
(Y page 147). MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
X To activate: press theÙbutton.
The indicator lamp in the button lights up.
X To activate: press off-road button Ù
again.
The indicator lamp goes out. The previously
selected settings are restored.
When you activate MAX COOL, climate
control switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on Defrosting the windows
Windows fogged up on the inside X
Activate the ¿cooling with air
dehumidification function.
X Activate automatic mode Ã.
X Adjust the side air vents so that the warmed
air is directed to the side windows.
X If the windows continue to fog up, activate
the ¬ "Windshield defrosting" function.
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Dual-zone automatic climate control: press
air distribution adjustment button Fup or
down (Y page 145), until the Por
O symbol appears in the display.
X 3-zone automatic climate control: press air
distribution adjustment button Iup or
down (Y page 147), until the Por
O symbol appears in the display.
X Adjust the side air vents so that no air is
directed to the side windows. Rear window defroster
General notes The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off
automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
Activating/deactivating X
Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X Press the ¤button.
The indicator lamp above the ¤button
lights up or goes out. Operating the climate control systems
153Climate control
ProCarManuals.com
Problems with the rear window defroster
Problem Possible causes/consequences and
M
MSolutions The rear window
defroster has
deactivated
prematurely or cannot
be activated. The battery has not been sufficiently charged.
X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-
recirculation mode
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
The operation of air-recirculation mode is the
same for all control panels.
Activating/deactivating X
Turn the SmartKey to position 2in the
ignition lock (Y page 159).
X To activate: press thegbutton.
The indicator lamp above the gbutton
lights up.
i Dual-zone automatic climate control: air-
recirculation mode is automatically
activated at high outside temperatures.
3-zone automatic climate control: air-
recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures.
When air-recirculation mode is activated
automatically, the indicator lamp above the g
button does not light up. Outside air
is added after about 30 minutes.
X To deactivate: press thegbutton.
The indicator lamp above the gbutton
goes out.
i Air-recirculation mode deactivates
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡(5 †) if the "Cooling
with air dehumidification" function is
activated Activating/deactivating the residual
heat function
General notes The residual heat function is only available in
vehicles for Canada with automatic climate
control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends on the temperature that has been
set. 154
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Activating/deactivating
X
Turn the SmartKey to position 0in the
ignition lock or remove it (Y page 159).
X To activate: press theÌbutton.
The indicator lamp above the Ìbutton
lights up.
i If the residual heat function is activated,
the windows may fog up on the inside.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
X To deactivate: press theÌbutton.
The indicator lamp above the Ìbutton
goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops Setting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air
outlets. If necessary, redirect the airflow to
another area of the vehicle interior. In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R
keep the air inlet between the windshield
and the hood free of blockages, such as ice,
snow or leaves.
R never cover the air vents or air intake grilles
in the vehicle interior. Setting the center air vents
:
Center air vent, left
; Center air vent, right
= Center vent thumbwheel, right
? Center vent thumbwheel, left
X To open/close: turn thumbwheels =
and ?up or down. Setting the side air vents
:
Defroster vent
; Side air vent
= Control for side air vent Setting the air vents
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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. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parking brake has not been fully
released when driving, the parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only shift the automatic transmission to
the desired drive position when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. You could otherwise damage the
drive train.
! AMG vehicles: at low engine oil
temperatures below 68 ‡ (+20 †), the
maximum engine speed is restricted in
order to protect the engine. To protect the
engine and maintain smooth engine operation, avoid driving at full throttle when
the engine is cold.
HYBRID vehicles: ensure that you read the
"HYBRID" supplement included in the vehicle
literature. Otherwise, you may not recognize
dangers. Key positions
SmartKey g
To remove the SmartKey
(shift the transmission to position P)
1 Power supply for some consumers, such
as the windshield wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the engine
i The SmartKey can be turned in the
ignition lock even if it is not the correct
SmartKey for the vehicle. The ignition is not
switched on. The engine cannot be started.
KEYLESS-GO General notes
R
Do not store the KEYLESS-GO key together
with:
-electronic devices, e.g. a mobile phone
or another SmartKey
- metallic objects, e.g. coins or metal film
R Do not keep the KEYLESS-GO key in metal
objects, e.g. metal cases. Driving
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This can affect the functionality of
KEYLESS-GO.
Vehicles with KEYLESS-GO are equipped with
SmartKeys featuring the integrated KEYLESS-
GO function and a detachable Start/Stop
button.
The Start/Stop button must be inserted in the
ignition lock and the SmartKey must be in the
vehicle.
Pressing the Start/Stop button several times
in succession corresponds to the different
SmartKey positions in the ignition lock. This
is only the case if you are not depressing the
brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts
immediately.
The Start/Stop button can be removed from
the ignition lock. Then, you can insert the
SmartKey into the ignition lock.
i You do not have to remove the Start/Stop
button from the ignition lock when you
leave the vehicle. You should, however,
always take the SmartKey with you when
leaving the vehicle. As long as the
SmartKey is in the vehicle:
R the vehicle can be started using the
Start/Stop button and
R electrically powered equipment can be
operated.
Key positions with KEYLESS-GO As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. If an indicator lamp does not go out after starting the engine or lights up while driving,
see (Y
page 287).
X Insert Start/Stop button :into ignition
lock ;.
i When you insert Start/Stop button :
into ignition lock ;, the system needs
approximately two seconds recognition
time. You can then use Start/Stop
button :.
Activating power supply
X Position 0: if Start/Stop button :has not
yet been pressed, this corresponds to the
SmartKey being removed from the ignition.
X Position 1: press Start/Stop button :.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
Switching on the ignition
X Position 2(ignition): press Start/Stop
button :twice.
The ignition is switched on.
i The ignition is switched off when:
R the driver's door is opened and
R you press Start/Stop button :once
when in this position. Start/Stop button
=
USA only
? Canada only 160
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Starting the engine
Important safety notes G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shift the automatic transmission out of
parking position P.
R starting the engine.
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 or animals unattended in the
vehicle. Always keep the SmartKey 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
without 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 pedal
when starting the engine. General notes i
Vehicles with a gasoline 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.
The transmission position display in the
multifunction display shows P.
i You can also start the engine when the
transmission is in position N.
Starting procedure with the SmartKey i
To start the engine using the SmartKey
instead of KEYLESS-GO, pull the Start/
Stop button out of the ignition lock.
X To start a gasoline engine: turn the
SmartKey to position 3in the ignition lock
(Y page 159) and release it as soon as the
engine is running.
X To start a diesel engine: turn the
SmartKey to position 2in the ignition lock
(Y page 159).
The % preglow indicator lamp in the
instrument cluster lights up.
X When the %preglow indicator lamp
goes out, turn the SmartKey to position
3(Y page 159) and release it as soon as the
engine is running.
i You can start the engine without preglow
if the engine is warm.
Using KEYLESS-GO to start the engine i
The Start/Stop button can be used to
start the vehicle manually without inserting
the SmartKey into the ignition lock. The
Start/Stop button must be inserted in the
ignition lock and the SmartKey must be in
the vehicle. This mode for starting the
engine operates independently of the ECO
start/stop automatic engine start function. Driving
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ECO start/stop function
Introduction The ECO start/stop function switches the
engine off automatically if the vehicle is
stopped under certain conditions.
The engine starts automatically when the
driver wants to pull away again. The ECO
start/stop function thereby helps you to
reduce the fuel consumption and emissions
of your vehicle.
Important safety notes G
WARNING
If the engine is switched off automatically and
you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving.
There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away.
General notes :
ECO start/stop display
i Hybrid vehicles: observe the notes on
the ECO start/stop function in the
"HYBRID" supplement.
If the ¤ symbol is shown in green in the
multifunction display, the ECO start/stop
function switches the engine off
automatically if the vehicle stops moving.
Every time you switch on the engine using the
SmartKey or the Start/Stop button, the ECO
start/stop function is activated.
If the ECO start/stop function has been
manually deactivated (Y page 164) or a
malfunction has caused the system to be deactivated, the
¤symbol is not
displayed.
AMG vehicles: theStop/Start active Stop/Start active or
Stop/Start inactive Stop/Start inactive message in the AMG
menu in the multifunction display goes out.
AMG vehicles: the ECO start/stop function
is only available in drive program C.
For further information on automatic engine
switch-off (Y page 163) and automatic
engine start (Y page 164).
Automatic engine switch-off General notes
The ECO start/stop function is operational
and the
¤symbol is displayed in green in
the multifunction display, if:
R the indicator lamp in the ECO button is lit
green.
R the outside temperature is within the
comfort range.
R the engine is at normal operating
temperature.
R the set temperature for the vehicle interior
has been reached.
R the battery is sufficiently charged.
R the system detects that the windshield is
not fogged up when the air-conditioning
system is switched on.
R the hood is closed.
R the driver's door is closed and the driver's
seat belt is fastened.
If conditions for automatic engine switch-off
have not been fulfilled, the ¤symbol will
be shown in yellow.
AMG vehicles: the AMG menu in the
multifunction display additionally shows the
Stop/Start inactive Stop/Start inactive message.
i All of the vehicle's systems remain active
when the engine has been stopped
automatically.
i All vehicles (apart from AMG
vehicles): automatic engine switch-off can
take place a maximum of four times Driving
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