Mercedes-Benz S-Sedan 2015 Owners Manual - Manual (Page 176)

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:
R the Start/Stop button must be inserted in
the ignition lock.
R the SmartKey must be in the vehicle.
R the vehicle must not be locked with the
SmartKey or KEYLESS-GO (
Y
page 85).
Do not keep the SmartKey:
R
with electronic devices, e.g. a mobile
phone or another SmartKey
R with metallic objects, e.g. coins or metal
foil
R inside metallic objects, e.g. a metal case
This can affect the functionality of the Smart-
Key.
Do not keep the SmartKey in the tempera-
ture-controlled cup holder (
Y
page 330). Oth-
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:
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 but-
ton on the front door (
Y
page 91), you can
continue to start the engine with the Start/
Stop button.
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 (
Y
page 308).
If Start/Stop button : has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
X To switch on the power supply: press
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:
R the driver's door is opened and
R
you press Start/Stop button : twice when
in this position
X To switch on the ignition: press Start/
Stop button : twice.
The ignition is switched on.
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
174
Driving
Driving
and
parking