
:
Air vent thumbwheel
; Air vent
When automatic climate control is activated, the
glove compartment can be ventilated, for
instance to cool its contents. The level of airflow depends on the airflow and air distribution set-
tings.
X To open or close: turn control:to the right
or left. Setting the blower output of the AIR-
SCARF vents G
WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could result in burns in the immediate
vicinity of the air vents. There is a risk of injury.
Reduce the heater output before it becomes
too hot. You can adjust the blower output of AIRSCARF
vents :using the AIRSCARF button
(Y page 106). Air vents
137Climate control Z

Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
Key positions
Key g
To remove the key
1 Power supply for some consumers, such as
the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the vehicle
i If the key does not belong to the vehicle, it
can still be turned in the ignition lock. How-
ever, the ignition will not be switched on. The
engine cannot be started.
KEYLESS-GO General notes
Vehicles with KEYLESS-GO are equipped with
keys featuring an integrated KEYLESS-GO func-
tion and a detachable Start/Stop button.
The Start/Stop button must be inserted in the
ignition lock and the key must be in the vehicle.
When you insert the Start/Stop button into the ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
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 immedi-
ately. A check which periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in the vehicle.
This occurs, for example, when starting the
engine.
To start the vehicle without actively using the
key:
R the Start/Stop button must be inserted in the
ignition lock
R the key must be in the vehicle
R the vehicle must not be locked with the key or
KEYLESS-GO (Y page 75)
Do not keep the KEYLESS-GO key:
R with electronic devices, e.g. a mobile phone
or another key
R with metallic objects, e.g. coins or metal film
R inside metallic objects, e.g. a metal case
This can affect the functionality of KEYLESS-GO.
If you lock the vehicle with the key's remote
control or with KEYLESS-GO, after a short time:
R you will not be able to switch on the ignition
with the Start/Stop button
R you will not be able to start the engine with the
Start/Stop button until the vehicle is
unlocked again
If you lock the vehicle centrally using the button
on the front door (Y page 81), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with KEYLESS-GO :
Start/Stop button
; Ignition lock Driving
139Driving and parking Z

General notes
i
Vehicles with a petrol engine:
the cata-
lytic converter is preheated for up 30 seconds
after a cold start. The sound of the engine may change during this time.
Manual transmission X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to neutral N.
Automatic transmission X
Shift the transmission to position P.
The transmission position indicator in the
multifunction display shows P.
i You can start the engine in transmission
position Pand N.
Starting procedure with the key i
To start the engine using the key instead of
KEYLESS-GO, pull the Start/Stop button out
of the ignition lock.
X Vehicles with diesel engine: turn the key to
position 2in the ignition lock (Y page 139).
The % preglow indicator lamp in the instru-
ment cluster lights up.
X Turn the key to position 3in the ignition lock
and release it as soon as the engine is running (Y page 139).
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 i
The Start/Stop button can be used to start
the vehicle manually 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 ignition lock. This mode for
starting the engine operates independently of the ECO start/stop automatic engine start
function. X
Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button once
(Y page 139).
Vehicles with a petrol engine: the engine
starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts. Pulling away
General notes G
WARNING
Vehicles with automatic transmission:
If the engine speed is above the engine idling speed and you then engage transmission
position Dor R, the vehicle may accelerate
suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always keep the brake pedal firmly depressed
and do not depress the accelerator pedal at
the same time.
! Vehicles with manual transmission:
change gear in good time and avoid spinning
the wheels. You could otherwise damage the
vehicle.
! If a warning tone sounds and the
Release Release
park. brake
park. brake message appears in the multi-
function display, the parking brake is still
applied. Release the parking brake.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature (Y page 225).
Vehicles with automatic transmission: it is
only possible to shift the transmission from posi-
tion Pto the desired position if you depress the
brake pedal. If you do not depress the brake
pedal, the DIRECT SELECT lever can still be
moved but the parking lock remains engaged.
i Vehicles with automatic transmission:
upshifts take place at higher engine speeds Driving
141Driving and parking Z

X
Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the parking brake.
X Switch off the ignition and leave the key in the
ignition lock.
Engaging drive position D X
If the transmission is in position Ror N: push
the DIRECT SELECT lever down past the first
point of resistance.
X If the transmission is in position P: depress
the brake pedal and push the DIRECT SELECT lever down past the first point of resistance. Transmission positions
B Park position
This prevents the vehicle from rolling
away when stopped. Only shift the
transmission into position Pwhen
the vehicle is stationary
(Y page 159).
Park position Pis automatically
engaged if:
R you switch off the engine using the
key and remove the key
R you switch off the engine using the
key or using the Start/Stop button
and open the driver's door or front- passenger door
R you open the driver's door when
the vehicle is stationary or driving
at very low speed and the trans-
mission is in position Dor R C Reverse gear
Only shift the transmission into posi-
tion Rwhen the vehicle is stationary. A Neutral
Do not shift the transmission to
N
while driving. Otherwise, the auto-
matic transmission could be dam-
aged.
No power is transmitted from the
engine to the drive wheels.
Releasing the brakes will allow you to
move the vehicle freely, e.g. to push
it or tow it.
If ESP ®
is deactivated or faulty: shift
the transmission only to position Nif
the vehicle is in danger of skidding,
e.g. on icy roads.
If you switch the engine off with the
transmission in position Ror D, the
automatic transmission shifts to N
automatically.
! Rolling in neutral
Ncan lead to
damage to the transmission. 7 Drive
The automatic transmission changes
gear automatically. All forward gears
are available. Driving tips
Changing gear The automatic transmission shifts to the indi-
vidual gears automatically when it is in trans-
mission position
D. Gearshifting is determined
by:
R the selected drive program (Y page 150)
R the position of the accelerator pedal
(Y page 149)
R the driving speed
Accelerator pedal position Your style of driving influences how the auto-
matic transmission shifts gear:
R little throttle: early upshifts
R more throttle: late upshifts Automatic transmission
149Driving and parking Z

Steering wheel gearshift paddles
In the manual drive program, you can change
gears manually using steering wheel gearshift
paddles :and ;.
Further information about permanent drive pro-
gram M(Y page 152).
Further information about temporary drive pro-
gram M(Y page 151).
i You can only change gear with the steering
wheel gearshift paddles when the transmis-
sion is in position D. Automatic drive program
Automatic drive program E Drive program
Eis characterised by the follow-
ing:
R comfort-oriented engine settings.
R optimal fuel consumption resulting from the
automatic transmission shifting up sooner.
R the vehicle pulling away more gently in
forward and reverse gears unless the accel-
erator pedal is depressed fully.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for exam-
ple.
R the automatic transmission shifting up
sooner. This results in the vehicle being driven
at lower engine speeds and the wheels being less likely to spin. Automatic drive program S Drive program
Sis characterised by the follow-
ing:
R sporty engine settings.
R the automatic transmission shifting up later,
as a result of the later automatic transmission
shift points, the fuel consumption possibly
being higher.
Manual drive program M General notes
In this drive program, you can briefly change
gear yourself by using the steering wheel gear-
shift paddles. The transmission must be in posi-
tion D.
You can activate manual drive program Min
automatic drive programs Eand S.
i As well as temporary drive program
M, you
can also activate permanent drive program M
(Y page 150).
Further information about permanent drive
program M(Y page 152).
Activating X Shift the transmission to position D.
X Pull the left or right steering wheel gearshift
paddle (Y page 151).
Manual drive program Mis temporarily acti-
vated. The selected gear and Mappear in the
multifunction display.
Shifting gears
If you pull on the left or right-hand steering
wheel gearshift paddle, the automatic transmis- sion switches to manual drive program Mfor a
limited amount of time. Depending on which
gearshift paddle is pulled, the automatic trans-
mission immediately shifts into the next gear up
or down, if permitted.
X To shift up: pull the right-hand steering wheel
gearshift paddle (Y page 151).
The automatic transmission shifts up to the
next gear.
i If the maximum engine speed on the cur-
rently engaged gear is reached and you con-
tinue to accelerate, the automatic transmis- Automatic transmission
151Driving and parking Z

sion automatically shifts up in order to pre-
vent engine damage.
X To shift down: pull on the left-hand steering
wheel gearshift paddle (Y page 151).
The automatic transmission shifts down to
the next gear.
i If the engine exceeds the maximum engine
speed when shifting down, the automatic
transmission protects against engine damage
by not shifting down.
i Automatic downshifting occurs when coast-
ing.
Gearshift recommendation The gearshift recommendations assist you in
adopting an economical driving style. The rec-
ommended gear is shown in the multifunction
display.
X Shift to recommended gear ;according to
gearshift recommendation :when shown in
the multifunction display of the instrument
cluster.
Deactivating If you have activated manual drive program M, it
will remain 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.
When manual drive program Mis deactivated,
the automatic transmission shifts into the auto- matic drive program that was last selected.
You can also deactivate manual drive program
M yourself:
X Pull on the right-hand steering wheel gearshift
paddle and hold it in place (Y page 151).
or X Use the DIRECT SELECT lever to shift the
transmission position (Y page 147).or
X Use the program selector button to change
the drive program (Y page 150).
Manual drive program Mis deactivated. The
automatic transmission switches into the
automatic drive program that was last selec-
ted. Manual drive program
General notes In this drive program, you can permanently
change gear yourself by using the steering
wheel gearshift paddles. The transmission must
be in position D.
i As well as this permanent drive program
M,
you can also activate temporary drive pro-
gram M(Y page 151).
Activating the manual drive program X
Press the program selector button
(Y page 150) repeatedly until Mappears in
the multifunction display.
The manual drive program is only available on
vehicles with the dynamic handling package or
AMG Sports package.
Manual drive program Mdiffers from drive pro-
gram Swith regard to spontaneity, responsive-
ness and the smoothness of the gear changes.
Manual drive program Mcan be selected using
the program selector button. In manual drive
program M, you can change gear yourself using
the steering wheel gearshift paddles if the trans- mission is in position D. The gear selected is
shown in the multifunction display.
Upshifting X
Pull the right-hand steering wheel gearshift
paddle.
The automatic transmission shifts up to the
next gear. 152
Automatic transmissionDriving and parking

Gearshift recommendation
The gearshift recommendations assist you in
adopting an economical driving style. The rec-
ommended gear is shown in the multifunction
display.
X If relevant gearshift recommendation :
appears in the multifunction display on the
instrument cluster, pull on the right-hand
steering wheel gearshift paddle (Y page 151).
The automatic transmission shifts to recom-
mended gear ;.
Downshifting X
Pull the left-hand steering wheel gearshift
paddle.
The automatic transmission shifts down to
the next gear.
i For maximum acceleration, pull the left-
hand steering wheel gearshift paddle until the
transmission selects the optimum gear for
the current speed.
Kickdown You can also use kickdown for maximum accel-
eration in manual drive program M.
X Depress the accelerator pedal beyond the
pressure point.
The transmission shifts to a lower gear
depending on the engine speed.
Deactivating the manual drive program X
Press the program selector button
(Y page 150). Automatic transmission
153Driving and parking Z

G
WARNING
If you leave children unattended in the vehi-
cle, they may be able to set the vehicle in
motion if, for example, they:
R release the parking brake
R shift the automatic transmission out of park
position Por shift manual transmission into
neutral
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 key with you and lock the vehicle. Never leave
children unattended in the vehicle.
! Always secure the vehicle correctly against
rolling away. Otherwise, the vehicle or its driv-
etrain could be damaged.
To ensure that the vehicle is safeguarded
against rolling away unintentionally:
R the parking brake must be applied
R on vehicles with manual transmission, engage
1st gear or reverse gear
R on vehicles with automatic transmission, the
transmission must be in position Pand the
key must be removed from the ignition lock
R the front wheels must be turned towards the
kerb on steep uphill or downhill gradients Switching off the engine
Important safety notes 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. Vehicles with manual transmission X
Shift to either 1st gear or reverse gear R.
X Turn the key to position 0in the ignition lock
and remove it.
The immobiliser is activated.
X Firmly depress the parking brake.
Vehicles with automatic transmission X
Firmly depress the parking brake.
X Shift the transmission to position P.
X With the key: turn the key to position 0in the
ignition lock and remove it.
The immobiliser is activated.
X With KEYLESS-GO: press the Start/Stop
button (Y page 139).
The engine stops and all the indicator lamps in the instrument cluster go out.
When the driver's door is closed, this corre-
sponds to key position 1. When the driver's
door is open, this corresponds to key position
0: "key removed".
If you switch the engine off with the transmis-
sion in position Ror D, the automatic transmis-
sion shifts to Nautomatically.
With the key: if you then open the driver's door
or the front-passenger door or remove the key
from the ignition, the automatic transmission
shifts to Pautomatically.
With KEYLESS-GO: if you then open the driver's
or front-passenger door, the automatic trans-
mission shifts to P.
If you want the automatic transmission to
remain in neutral N, e.g. when having the vehicle
cleaned in an automatic car wash with a towing
system:
X Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock.
X Insert the key into the ignition lock.
X All vehicles: switch the ignition on.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the parking brake.
X Switch off the ignition and leave the key in the
ignition lock. 158
ParkingDriving and parking