Page 137 of 380

X
Press the 0058 button.
The indicator lamp in the 0064
button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Turn temperature control 0043 or 0084
clockwise or counter-clockwise
(Y page 127), ( Y page 130).
or
X Press the 0097 or 0095 button. 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.
When you activate MAX COOL, climate
control switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on
X To activate: press the 00C9 button.
The indicator lamp in the button lights up.
X To activate: press the 00C9 button again.
The indicator lamp goes out.
The previously
selected settings are restored. Defrosting the windows
Windows fogged up on the inside X
Activate the 005A cooling with air
dehumidification function.
X Activate automatic mode 0058.
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
(Y page 134).
i You should only select this setting until
the windshield is clear again. Windows fogged up on the outside X
Activate the windshield wipers.
X Press the 008F button repeatedly until the
009B or 009C symbol appears in the
display.
X Adjust the side air vents so that no air is
directed to the side windows. Rear window defroster
Activating/deactivating 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.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X Press the 006C button.
The indicator lamp in the 006C
button lights
up or goes out. Operating the climate control systems
135Climate control
Page 138 of 380

Problems with the rear window defroster
Problem Possible causes/consequences and
0050 SolutionsThe 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
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.
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.
The operation of air-recirculation mode
is the
same for all control panels.
X Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X To activate: press the 0072 button.
The indicator lamp
in the
0072
button lights
up.
i In the event of high
pollution levels12
or at
high outside temperatures, air-
recirculation mode is automatically
activated. When air-recirculation mode is
activated automatically, the indicator lamp
in the 0072 button is not lit.
Outside air is added after about
30 minutes.
X To deactivate: press the 0072 button.
The indicator lamp in the 0072
button 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
The residual heat function is
only available in
vehicles for Canada with 3-zone 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.
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.
12 3-zone automatic climate control only.136
Operating the climate control systems
Climate control
Page 139 of 380

X
Turn the SmartKey to position 0 in the
ignition lock (Y page 141) or remove it.
X To activate: press the 004B button.
The indicator lamp in the 004B
button lights
up.
i If the residual heat function is activated,
the windows may fog up on the inside.
X To deactivate: press the 004B button.
The indicator lamp in the 004B
button goes
out.
i Residual heat is deactivated
automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R when the auxiliary heating is activated 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.
i For virtually draft-free ventilation, adjust
the sliders of the air vents to the center
position. Setting the center air vents
X
To open the center air vent: turn the
adjuster in one of center air vents 0043
counter-clockwise.
X To close the center air vent: turn the
adjuster in one of center air vents 0043
clockwise until it engages. Setting the side air vents
0043
Side window defroster vent
0044 Side air vent
X To open a side air vent: turn the adjuster
in side air vent 0044 counter-clockwise.
X To close a side air vent: turn the adjuster
in side air vent 0044
clockwise until it
engages. Setting the glove box air vent
When automatic climate control is activated,
the glove box can be ventilated, for instance Setting the air vents
137
Climate control Z
Page 140 of 380
to cool its contents. The level of airflow
depends on the airflow and air distribution
settings.
!
Close the air vent when heating the
vehicle.
At high outside temperatures, open the air
vent and activate the "cooling with air
dehumidification" function. Otherwise,
temperature-sensitive items stored in the
glove box could be damaged. 0043
Air vent thumbwheel
0044 Air vent
X To open/close: turn thumbwheel 0043
clockwise or counter-clockwise. Setting the rear-compartment air
vents
0043
Rear-compartment air vent thumbwheel
0044 Rear-compartment air vent, right 0087
Rear control panel, only with 3-zone
automatic climate control 13
0085 Rear-compartment air vent, left
X To open/close: turn thumbwheel 0043 up or
down.
13 Canada only.138
Setting the air ventsClimate control
Page 141 of 380
Useful information ............................
140
Notes on breaking-in a new vehicle 140 Driving ............................................... 140
Automatic transmission ................... 148
Refueling ............................................ 154
Parking ............................................... 160
Driving tips ........................................ 162
Driving systems ................................ 169
Towing a trailer ................................. 208 139Driving and parking
Page 142 of 380

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your
vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 27).Notes on breaking-in a new vehicle
Important safety notes
New and replaced brake pads and discs only
reach their optimum braking effect after
several hundred kilometers of driving.
Compensate for this by applying
greater force
to the brake pedal. The first 1,000miles (1,500 km)
The more you look after
the engine when it is
new, the more satisfied you will be with its
performance in the future.
R You should therefore drive at varying
vehicle and engine speeds for the first
1,000 miles (1,500 km).
R Ideally, for the first 1,000 miles (1,500 km),
drive in program E.
R Avoid heavy loads, e.g. driving at full
throttle, during this period.
R Change gear in good time, before the
tachometer needle is 00C3 of the way to the
red area of the tachometer.
R Do not manually shift to a lower gear to
brake the vehicle. R
If possible, do not depress the accelerator
pedal past the point of resistance
(kickdown).
R Only select shift ranges 3, 2 or 1 when
driving slowly, e.g. in mountainous terrain.
After 1,000 miles (1,500 km), you can
increase the engine speed gradually and
accelerate the vehicle to full speed.
i You should also observe these notes on
breaking in if the
engine or parts of the drive
train on your vehicle have been replaced.
i Always observe the respective speed
limits. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell can restrict the
pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle
is jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals.
Do not use
loose floormats. 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,140
Driving
Driving and parking
Page 143 of 380

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. Key positions
SmartKey 005A
To remove the SmartKey
(shift the transmission to position P)
0047 Power supply for some consumers, such
as the windshield wipers 0048
Ignition (power supply for all consumers)
and drive position
0049 To start the engine
The steering is locked when you remove the
SmartKey from the ignition lock.
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 keep the KEYLESS-GO key:
-with electronic devices, e.g. a mobile
phone or another SmartKey
- with metallic
objects, e.g.
coins
or metal
foil
- inside metallic objects, e.g. a metal case
This can impair the functionality of the
KEYLESS-GO key.
Vehicles with KEYLESS-GO are equipped with
a SmartKey featuring an 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
key 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. The vehicle can be Driving
141
Driving and parking Z
Page 144 of 380

started with the Start/Stop button if the
SmartKey is in the vehicle. Electrically
powered equipment can be operated.
0043
Start/Stop button
0044 Ignition lock
X Insert Start/Stop button 0043 into ignition
lock 0044.
i When you insert Start/Stop button 0043
into ignition lock 0044, the system needs
approximately 2 seconds recognition
time.
You can then use Start/Stop button 0043
.Start/Stop button
0087
USA only
0085 Canada only
X Position 0: if Start/Stop button
0043 has not
yet been pressed, this corresponds to the
key being removed from the ignition.
X Position
1: press Start/Stop button 0043.
You can now activate the windshield
wipers, for example. i
If you then open the
driver's door when in
this position, the power supply is
deactivated.
X Position 2: (ignition): press Start/Stop
button 0043 twice.
i The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button 0043 once
when in this position
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 259). 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. There142
Driving
Driving and parking