KEYLESS- GOGenera l notesVehicles wit h KEYLESS-GO are equipped wit h a
SmartKey featurin g an integrate d KEYLESS-GO
function and a detachable Start/Sto p button.
A chec k whic h periodically establishes a radi o
connection between th e vehicl e and th e Smart -
Key determine s whether a valid SmartKey is in
th e vehicle. This occurs, for example, when
starting th e engine.
Whe n you insert th e Start/Sto p butto n int o th e
ignition lock, th e system needs approximately
two seconds recognition time. You can then use
th e Start/Sto p button.
Pressing th e Start/Sto p butto n several times in
succession corresponds to th e differen t ke y
position s in th e ignition lock. This is only th e
cas e if you are no t depressing th e brak e pedal .
If you depress th e brak e pedal and press th e
Start/Sto p button, th e engin e start s immedi-
ately.
To start th e vehicl e without actively usin g th e
SmartKey: R
th e Start/Sto p butto n mus t be inserted in th e
ignition lock. R
th e SmartKey mus t be in th e vehicle.R
th e vehicl e mus t no t be locke d wit h th e
SmartKey or KEYLESS-GO ( Y
page 79).
Do no t keep th e SmartKey:R
wit h electronic devices, e.g. a mobile phone
or another SmartKey. R
wit h metallic objects , e.g. coins or metal foil.R
inside metallic objects , e.g. a metal case.
This can impair th e functionalit y of th e KEY-
LESS-GO key.
Do no t keep th e KEYLESS-GO ke y in th e tem-
perature-controlled cup holder ( Y
page 340).
Otherwise , th e KEYLESS-GO ke y will no t be rec -
ognized.
If you loc k th e vehicl e wit h th e SmartKey' s
remot e control or wit h KEYLESS-GO , after a
short time: R
you will no t be able to switch on th e ignition
wit h th e Start/Sto p button.R
you will no t be able to start th e engin e wit h th e
Start/Sto p butto n until th e vehicl e is
unlocke d again . If you loc k th e vehicl e centrally usin g th e butto n
on th e fron t door ( Y
page 85) , you can continu e
to start th e engin e wit h th e Start/Sto p button.
The engin e can be switched off while th e vehicl e
is in motion by pressing and holding th e Start /
Stop butto n for three seconds. This function
operate s independentl y of th e ECO start/sto p
automatic engin e switch-off function .
Key positions wit h KEYLESS-G O
C
Start/Sto p butto n D
Ignition loc k
As soo n as th e ignition is switched on , all th e
indicator lamp s in th e instrumen t cluste r ligh t
up. Further information on situation s wher e an
indicator lamp either fail s to go out after starting
th e engin e or lights up while drivin g
( Y
page 317).
If Start/Sto p butto n C has no t yet been
pressed, this corresponds to th e ke y bein g
remove d from th e ignition .X
To switch on th e power supply : press
Start/Sto p butto n C once .
The powe r supply is switched on . You can no w
activat e th e windshield wipers, for example.
The powe r supply is switched off again if: R
th e driver's door is opened and R
you press Start/Sto p butto n C twice when in
this position X
To switch on th e ignition: press Start/Sto p
butto n C twice .
The ignition is switched on .
If you press Start/Sto p butto n C once when
in this position , th e ignition is switched off
again .146
Driving
Driving and parking
Removing the Start/Stop button You can remove the Start/Stop button from the
ignition lock and start the vehicle as normal
using the SmartKey.
It is only possible to switch between KEYLESS-
GO mode and SmartKey operation when the
transmission is in position P .X
Remove Start/Stop button C from ignition
lock D .
You do not have to remove the Start/Stop but-
ton 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 R
the electrically powered equipment can be
operated
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
shifting the automatic transmission out of
park position PR
Start 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 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 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
( Y
page 155).
The transmission position display in the mul-
tifunction display shows P ( Y
page 154).
i You can start the engine in transmission
position P and N .
Starting procedure with the SmartKey X
To start a diesel engine : turn the SmartKey
to position 2 in the ignition lock ( Y
page 145).
The \( preglow indicator lamp in the instru-
ment cluster lights up. X
Turn the SmartKey to position 3 in the ignition
lock and release it as soon as the engine is
running ( Y
page 145).Driving 147
Driving and parking Z