start stop button MERCEDES-BENZ S-Class 2008 W221 Comand Manual

417 Controls in detail
Driving and parking
For more information on how to operate
the gear selector lever, see “Automatic
transmission” (
page 426).
Starting with the SmartKey

Make sure the automatic transmission
is set to park positionP.
The gear position indicator in the multi-
function display should be on park
positionP.

Do not depress accelerator.

Turn the SmartKey in the starter switch
to position3 and hold until the engine
starts (
page 370).
For information on turning off the engine
with the SmartKey, see “Turning off the en-
gine” (
page 424).Starting with KEYLESS-GO*
You can start your vehicle without the
SmartKey in the starter switch using the
KEYLESS-GO start/stop button on the
starter switch.
The SmartKey with KEYLESS-GO must be
located in the vehicle.
KEYLESS-GO start/stop button1USA only
2Canada only
Make sure KEYLESS-GO start/stop
button is inserted in the starter switch
(page 371).

Make sure the automatic transmission
is set to park positionP.
The gear position indicator in the multi-
function display should be on park
positionP.

Depress the brake pedal during the
starting procedure.

Do not depress accelerator.
i
You can also use the “touch-start” function.
Turn the SmartKey to position3 and release it
again immediately. The engine then starts auto-
matically.
i
You can also start the engine with the auto-
matic transmission set to neutral positionN.
Warning!
G
As long as the SmartKey with KEYLESS-GO
is in your vehicle, the vehicle can be started.
Therefore, never leave children unattended
in the vehicle, as they could otherwise acci-
dentally start the engine.
When leaving the vehicle, always take the
SmartKey with KEYLESS-GO with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.


418 Controls in detailDriving and parking
Press KEYLESS-GO start/stop button
once.
The engine starts if the SmartKey with
KEYLESS-GO is in the vehicle.
For information on turning off the engine
with KEYLESS-GO, see “Turning off the en-
gine” (
page 424).Starting difficulties
The engine does not start. You can hear
the starter.
There could be a malfunction


in the engine electronics, or


in the fuel supply system
Carry out the following steps:

If you are starting the engine with the
SmartKey: Turn SmartKey in starter
switch to position0 and repeat starting
procedure (
page 416).

If you are starting the engine with
KEYLESS-GO*: Close any doors that
may be open to allow for better detec-
tion of the SmartKey with
KEYLESS-GO*.
or

Remove the KEYLESS-GO* start/stop
button from starter switch.

Start the engine with the SmartKey as
radio signals from another source may
be interfering with the SmartKey with
KEYLESS-GO*.

Repeat the starting procedure
(page 416).
If the engine does not start after several
starting attempts:

Contact an authorized Mercedes-Benz
Center or call Roadside Assistance.
The engine does not start. You cannot
hear the starter.
The battery may not be sufficiently
charged.

Have the vehicle jump-started
(page 734).
If the engine will not start despite a jump
start:

Contact an authorized Mercedes-Benz
Center or call Roadside Assistance.
i
You can also start the engine with the auto-
matic transmission set to neutral positionN.
i
If you wish to start the vehicle with the
SmartKey instead of the KEYLESS-GO feature,
remove the KEYLESS-GO start/stop button from
the starter switch and proceed as described in
“Starting with the SmartKey” (
page 417).
!
Remember that extended starting attempts
can drain the battery.


422 Controls in detailDriving and parking
Electronic parking brake


Shift the automatic transmission to park
positionP.


Slowly release brake pedal.


When parked on an incline, turn front
wheels towards the road curb.


Turn the SmartKey to starter switch
position0 and remove, or press
KEYLESS-GO* start/stop button
(page 372).


Take the SmartKey or the SmartKey with
KEYLESS-GO* with you and lock vehicle
when leaving.
Warning!
G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Children could release the
electronic parking brake and/or shift the
automatic transmission out of park
positionP, either of which could result in an
accident and/or serious personal injury.
Warning!
G
Getting out of your vehicle with the automat-
ic transmission not fully engaged in park
positionPis dangerous. Also, when parked
on an incline, park position P alone may not
prevent your vehicle from moving, possibly
hitting people or objects.
Always engage the electronic parking brake
in addition to shifting to park positionP
(page 416).
When parked on an incline, turn front wheels
towards the road curb.


425 Controls in detail
Driving and parking
Turning off with SmartKey
Turn the SmartKey in the starter switch
to position0 (
page 370) and remove
it.
The immobilizer is activated.Turning off with KEYLESS-GO*

Press the KEYLESS-GO start/stop
button (
page 372) to turn off the en-
gine.
With the driver’s door closed, the start-
er switch is now in position1. With the
driver’s door opened, the starter switch
is set to position0, same as SmartKey
removed from starter switch
(
page 370).
Releasing seat belts
Press the seat belt release button
(page 396).
Allow the retractor to completely re-
wind the seat belt by guiding the latch
plate.
!
If you turn off the engine using the
SmartKey and


remove the SmartKey from the starter
switch
or


open a front door
the transmission will shift to park positionP
automatically.
Keep in mind that turning off the engine with the
SmartKey alone only will automatically shift the
transmission to neutral positionN.
i
In an emergency you can turn off the engine
while driving by pressing and holding the
KEYLESS-GO start/ stop button for approxi-
mately 3 seconds.
!
KEYLESS-GO*:
If you turn off the engine using the KEYLESS-GO
start/stop button and open a front door, the
transmission will shift to park positionP
automatically.
Keep in mind that turning off the engine using
the KEYLESS-GO start/stop button alone only
will automatically shift the transmission to
neutral positionN.
!
Make sure the seat belt retracts fully so that
the seat belt and/or latch plate cannot get
caught or pinched in the door or in the seat
mechanism. This can damage the seat belt and
impair the effectiveness of the seat belt, and/or
cause damage to the door and/or door trim pan-
el. Such damage is not covered by the
Mercedes-Benz Limited Warranty.
Damaged seat belts must be replaced. Contact
an authorized Mercedes-Benz Center.

430 Controls in detailAutomatic transmissionTransmission positions
The current transmission position appears
in the multifunction display.
1Current transmission position!
If the current transmission position does not
appear in the multifunction display due to a
malfunction, for example, make sure that the
automatic transmission is in the desired position
by carefully driving off with the transmission in
drive positionD and program modeS
(
page 436) selected. Do not limit the gear
range.
Effect
ì
Park position
Shift into park positionP only
when vehicle is stopped. The
park position is not intended to
serve as a brake when the vehi-
cle is parked. Rather, the driver
should always engage the elec-
tronic parking brake in addition
to shifting into park positionP to
secure the vehicle.
If the vehicle’s electrical system
is malfunctioning, the automatic
transmission could remain
locked in park positionP.
Have the vehicle checked as
soon as possible by an autho-
rized Mercedes-Benz Center.
!
SmartKey:
If you turn off the engine using the SmartKey and


remove the SmartKey from the starter
switch
or


open a front door
the transmission will shift to park positionP
automatically.
Keep in mind that turning off the engine with the
SmartKey alone only will automatically shift the
transmission to neutral positionN.
!
KEYLESS-GO*:
If you turn off the engine using the KEYLESS-GO
start/stop button and open a front door, the
transmission will shift to park positionP
automatically.
Keep in mind that turning off the engine using
the KEYLESS-GO start/stop button alone only
will automatically shift the transmission to
neutral positionN.

431 Controls in detail
Automatic transmission
!
DISTRONIC Plus*:
The transmission will shift to park positionP
automatically, only when DISTRONIC Plus brings
your vehicle to a standstill, and when it meets at
least one of the following conditions at the same
time:


The engine is turned off.


The driver’s or passenger door opens and
the seat belt is not engaged in the buckle.


The hood is released.


The trunk lid is open while reverse gearR is
engaged.


The vehicle is parked for an extended period
of time.
In addition to shifting to park positionP, the
electronic parking brake will be engaged auto-
matically.
i
Make it a practice to always shift into park
positionP before turning off the engine and


remove the SmartKey from the starter
switch
or


open a front door
or when using KEYLESS-GO*, before turning off
the engine with the start/stop button and open-
ing a front door.
Effect
í
Reverse gear
Shift into reverse gearR only
when the vehicle is stopped.
ë
Neutral
No power is transmitted from the
engine to the drive axle. When
the brakes are released, the
vehicle can be moved freely
(pushed or towed).
To avoid damage to the trans-
mission, never shift into neutral
positionN while driving.
If the ESP
® is deactivated or
malfunctioning:
Shift into neutral positionN only
if the vehicle is in danger of
skidding, e.g. on icy roads.
Effect

432 Controls in detailAutomatic transmissionIf you want the gear position to remain in
neutral positionN, e.g. when taking the
vehicle through an automatic conveyor
type car wash or when towing the vehicle,
observe the following instructions.Vehicles with SmartKey:

With the vehicle at a standstill and the
ignition switched on shift the
automatic transmission to neutral
positionN.

If engaged, manually release the
electronic parking brake (
page 423).

Switch off the ignition and leave the
SmartKey in the starter switch.
Vehicles with KEYLESS-GO*:

With the vehicle at a standstill, depress
the brake pedal and keep it pressed.

Shift the automatic transmission to
park positionP.

Release the brake pedal.

Remove the KEYLESS-GO start/stop
button from the starter switch
(page 371).

Insert the SmartKey with KEYLESS-GO
into the starter switch.

With the ignition switched on shift the
automatic transmission to neutral
positionN.

If engaged, manually release the
electronic parking brake (
page 423).

Switch off the ignition and leave the
SmartKey with KEYLESS-GO in the
starter switch.
!
If you turn off the engine using the
SmartKey or the KEYLESS-GO* start/stop
button, the transmission will shift to neutral
positionN automatically.
Warning!
G
When leaving the SmartKey or SmartKey
with KEYLESS-GO* in the starter switch, do
not leave children unattended in the vehicle.
It is possible for children to switch on the
ignition which could result in unsupervised
use of vehicle equipment. Unsupervised use
of vehicle equipment could result in an
accident and/or serious personal injury.
!
Coasting the vehicle, or driving for any other
reason in neutral positionN can result in trans-
mission damage that is not covered by the
Mercedes-Benz Limited Warranty.
!
Observe instructions


when taking the vehicle through an
automatic conveyor type car wash
(page 618)


when towing the vehicle (
page 737)

513 Controls in detailTrunk
Closing trunk from outside manually
1Handles
Lower trunk lid by pulling firmly on
handles1.

Close the trunk with hands placed flat
on the trunk lid.
The power closing assist automatically en-
sures that the trunk lid is pulled closed
completely (
page 368).Closing trunk from outside
automatically*
The vehicle is only locked when the turn signals
flash three times. If you are carrying a second
SmartKey with KEYLESS-GO* with you, you can
still lock the vehicle.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
lid opening when closing the trunk. Be espe-
cially careful when small children are
around.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.
Warning!
G
Monitor the closing procedure carefully to
make sure no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk lid opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
do one of the following:

press button Š on the SmartKey or
SmartKey with KEYLESS-GO*


press the trunk opening/closing*
switch (on the driver’s door)


560 OperationDriving instructionsBrakes
To help prevent brake disk corrosion after
driving on wet road surfaces (particularly
salted roads), it is advisable to brake the
vehicle with considerable force prior to
parking. The heat generated serves to dry
the brakes.
If your brake system is normally only sub-
jected to moderate loads, you should occa-
sionally test the effectiveness of the
brakes by applying above-normal braking
pressure at higher speeds. This will also
enhance the grip of the brake pads.Refer to the description of the Brake Assist
System (BAS or BAS Plus*) (
page 69).
Brake pad wear or a leak in the system may
be the reason for low brake fluid level in
the reservoir.
The brake fluid level in the reservoir may
be too low if the red brake warning lamp in
the instrument cluster comes on while the
engine is running and an acoustic warning
sounds (
page 631). Observe additional
messages in the multifunction display that
may appear (page 642).
Have the brake system inspected
immediately. Contact an authorized
Mercedes-Benz Center.
Warning!
G
After driving in heavy rain for some time
without applying the brakes or through wa-
ter deep enough to wet brake components,
the first braking action may be somewhat
reduced and increased pedal pressure may
be necessary to obtain expected braking
effect. Maintain a safe distance from
vehicles in front.
Resting your foot on the brake pedal will
cause excessive and premature wear of the
brake pads.
It can also result in the brakes overheating,
thereby significantly reducing their effec-
tiveness. It may not be possible to stop the
vehicle in sufficient time to avoid an
accident.
!
Because the ESP
® operates automatically,
the engine and ignition must be shut off
(SmartKey in starter switch position0 or1 or
KEYLESS-GO start/stop button* in position0
or1) when


the electronic parking brake is being tested
on a brake test dynamometer


the vehicle is being towed with the
front/rear axle raised
Active braking action through the ESP
® may oth-
erwise seriously damage the brake system.
Warning!
G
Make sure not to endanger any other road
users when carrying out these braking ma-
neuvers.

562 OperationDriving instructionsDriving off
Apply the brakes to test them briefly after
driving off. Perform this procedure only
when the road is clear of other traffic.
Warm up the engine smoothly. Do not
place full load on the engine until the oper-
ating temperature has been reached.
Parking
!
When driving off on a slippery surface, do
not allow a drive wheel to spin for an extended
period with the ESP
® switched off. Doing so may
cause serious damage to the drivetrain which is
not covered by the Mercedes-Benz Limited War-
ranty.
!
Simultaneously depressing the accelerator
pedal and applying the brakes reduces engine
performance and causes premature brake and
drivetrain wear.
Warning!
G
Do not park this vehicle in areas where com-
bustible materials such as grass, hay or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
To reduce the risk of personal injury, or
damage to the vehicle drivetrain, as a result
of inadvertent vehicle movement, before
turning off the engine and leaving the vehi-
cle always:

Keep right foot on brake pedal.


Engage electronic parking brake.


Shift the automatic transmission toP.


Slowly release brake pedal.


When parked on an incline, turn front
wheels towards the road curb.


Turn the SmartKey or the SmartKey
with KEYLESS-GO* to starter switch
position0 and remove, or press the
KEYLESS-GO* start/stop button.


Take the SmartKey or the SmartKey with
KEYLESS-GO
* with you and lock the
vehicle when leaving.