Mercedes-Benz S-Class Operator's Manual page 192

Driving
190
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
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example,
when starting the engine.
To start the vehicle without actively using the
SmartKey:
the Start/Stop button must be inserted in
R
the ignition lock.
the SmartKey must be in the vehicle.
R
the vehicle must not be locked with the
R
SmartKey or KEYLESS-GO (
Do not keep the SmartKey:
with electronic devices, e.g. a mobile
R
phone or another SmartKey
with metallic objects, e.g. coins or metal
R
foil
inside metallic objects, e.g. a metal case
R
This can affect the functionality of the Smart-
Key.
Do not keep the SmartKey in the tempera-
ture-controlled cup holder (
erwise, the SmartKey will not be detected,
e.g. when starting the engine with the Start/
Stop button.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
you will not be able to switch on the ignition
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with the Start/Stop button.
you will not be able to start the engine with
R
the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the but-
ton on the front door (
continue to start the engine with the Start/
Stop button.
page 91).
Y
page 380). Oth-
Y
page 97), you can
Y
The engine can be turned off while the vehicle
is in motion by pressing and holding the
Start/Stop button for approximately three
seconds. This function operates independ-
ently of the ECO start/stop automatic engine
switch-off function.
SmartKey positions with the Start/Stop
button
Start/Stop button
:
Ignition lock
;
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 ( page 357).
Y
If Start/Stop button : has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
To switch on the power supply: press
X
Start/Stop button : once.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
The power supply is switched off again if:
the driver's door is opened and
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you press Start/Stop button : twice when
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in this position