Mercedes-Benz 2009 M-Class Operator's Manual page 97

have it checked and replaced if necessary. If
a lamp in the instrument cluster remains on
after starting the engine or comes on while
driving, refer to "Lamps in instrument
cluster" ( Y page 337).
!
If the SmartKey cannot be turned in the
starter switch, the vehicle battery may not
be sufficiently charged.
Check the vehicle battery and charge it
R
if necessary.
Get a jump start.
R
To prevent accelerated vehicle battery
discharge or a completely discharged
vehicle battery, always remove the
SmartKey from the starter switch when the
engine is not in operation.
i If the SmartKey does not belong to the
vehicle, the SmartKey can be turned in the
starter switch. However, the ignition does
not switch on and the engine does not start.
KEYLESS-GO
G Observe Safety notes, see
page 68.
Vehicles equipped with the KEYLESS-GO
feature are supplied with a SmartKey with
integrated KEYLESS-GO function and a
removable KEYLESS-GO start/stop button.
With the KEYLESS-GO start/stop button
inserted in the starter switch and the
SmartKey present in the vehicle, pressing the
KEYLESS-GO start/stop button
without the brake pedal depressed
R
corresponds to the various starter switch
positions ( Y page 94)
with the brake pedal firmly depressed will
R
start the engine ( Y page 122)
If you wish or should there be the need to
insert the SmartKey in the starter switch, the
KEYLESS-GO start/stop button can be easily
removed by pulling it out of the starter switch.
i The KEYLESS-GO start/stop button does
not need to be removed from the starter
switch when you leave the vehicle.
However, always take the SmartKey with
you when you leave the vehicle. As long as
the SmartKey is in the vehicle, the vehicle's
electrical systems can be switched on or
Controls in detail
Starter switch positions
the engine can be started using the
KEYLESS-GO start/stop button.
The SmartKey must be located in the vehicle.
KEYLESS-GO start/stop button
1
Starter switch
2
X
Insert KEYLESS-GO start/stop button
into starter switch (if not inserted
2
already).
X
Make sure the automatic transmission is in
park position P.
X
Do not depress the brake pedal.
1
Z
95