Page 100 of 481

99 Controls in detail
Locking and unlocking
If the SmartKey with KEYLESS-GO is re-
moved from the vehicle while the igni-
tion is switched on (e.g. if passenger
exits the vehicle with the SmartKey
with KEYLESS-GO), the message: KEY
NOT RECOGNIZEDwill appear in the multifunction display
while driving off.
Find the SmartKey or change its
present location immediately
(e.g. place it on the front passenger
seat or insert it in shirt pocket).
Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle. If you leave the SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, the message: KEY
STILL IN VEHICLEwill appear in the multifunction display.Factory setting
Global unlocking
Grasp an outside door handle.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither a door nor the trunk is opened
the central locking switch is not acti-
vatedGlobal locking
Press lock button on an outside door
handle (
page 58) or trunk lid
(
page 101).
With the trunk and all doors closed, all
turn signal lamps flash three times. The
locking knobs in the doors move down.
The anti-theft alarm system is armed.
iIf the vehicle has been parked for more
than 72 hours, you must pull an outside
door handle in order to activate the
KEYLESS-GO function.
iThe vehicle could inadvertently be un-
locked if the SmartKey with
KEYLESS-GO is within 3 ft. (1 m) of the
vehicle and:
an outside door handle is splashed
with water, or
you attempt to clean an outside
door handle.
Page 125 of 481

124 Controls in detailSeatsDrive-dynamic seat*
The drive-dynamic seat automatically ad-
justs the lateral support provided by the
seat backrest to your driving style.
The switches for the driver’s and front pas-
senger seat are located on the inner side of
the seat.
1Activate drive-dynamic function
The drive-dynamic seat electronically con-
trols the air pressure in the air chambers of
the seat backrest side bolsters. This func-
tion improves driving comfort and plea-
sure.
Switch on the ignition (
page 34).Activating
Press button1.
The indicator lamp in the switch comes
on and the following message appears
in the multifunction display for five sec-
onds:
Message for the driver’s seatMessage for the front passenger seat:DRIV. DYN. SEAT ADJ.
FRONT PASSENGER
ACTIVATED
Deactivating
Press button1 again.
The indicator lamp in the button goes
out.
The message for the driver’s seat:DRIV. DYN. SEAT ADJ.
DRIVER
DEACTIVATED or the message for the front passenger
seat:DRIV. DYN. SEAT ADJ.
FRONT PASSENGER
DEACTIVATED appears in the multifunction display.
iYou can adjust the characteristics of
the drive-dynamic seat using the con-
trol system (
page 171).
iWhen the engine is turned off, the last
cushion setting retained in memory.
The cushion is automatically adjusted
to this setting when the engine is re-
started.
Page 133 of 481

132 Controls in detailLightingManual headlamp mode
The low beam headlamps and parking
lamps can be switched on and off with the
exterior lamp switch. For exterior lamp
switch, see (
page 131).Automatic headlamp mode
The following lamps switch on and off au-
tomatically depending on the brightness of
the ambient light:
Low beam headlamps
Tail and parking lamps
License plate lamps
Side marker lamps
iWith the SmartKey removed from the
starter switch or the engine turned off
with KEYLESS-GO* and the driver’s
door open, a warning sounds if the
parking lamps or low beam headlamps
are switched on.
The message:
TURN OFF LIGHTS
appears in the multifunction display.
Warning!
G
If the exterior lamp switch is set toU,
the headlamps may switch off unexpect-
edly when the system senses bright am-
bient light, for example light from
oncoming traffic.
the headlamps will not be automatically
switched on under foggy conditions.
To minimize risk to you and to others, acti-
vate headlamps by turning exterior lamp
switch to B when driving or when traffic
and/or ambient lighting conditions require
you to do so.
In low ambient lighting conditions, only
switch from position U to B with the
vehicle at a standstill in a safe location.
Switching from U to B will briefly
switch off the headlamps. Doing so while
driving in low ambient lighting conditions
may result in an accident.
The automatic headlamp feature is only an
aid to the driver. The driver is responsible for
the operation of the vehicle’s lights at all
times.iThe front fog lamps and rear fog lamp
cannot be switched on manually with
exterior lamp switch in positionU.
To activate the fog lamps, turn exterior
lamp switch to positionB and pull
the exterior lamp switch to first or sec-
ond stop (
page 134).
Page 142 of 481

141 Controls in detail
Instrument cluster
Coolant temperature gauge
During severe operating conditions,
e.g. stop-and-go traffic, the coolant tem-
perature may rise close to 248°F (120°C),
i.e. close to the red zone of the tempera-
ture gauge.
The engine should not be operated with
the coolant temperature above 248°F
(120°C), i.e. in the red zone of the coolant
temperature gauge. Doing so may cause
serious engine damage which is not cov-
ered by the Mercedes-Benz Limited War-
ranty.
Trip odometer
Make sure you are viewing the trip
odometer display.
If it is not displayed, press the è or
ÿ button on the multifunction
steering wheel repeatedly until the trip
odometer appears (
page 143).
Press and hold reset buttonJ
(page 140) until the trip odometer is
reset.
Warning!
G
Driving when your engine is badly over-
heated can cause some fluids which
may have leaked into the engine com-
partment to catch fire. You could be se-
riously burned.
Steam from an overheated engine can
cause serious burns and can occur just
by opening the hood. Stay away from
the engine if you see or hear steam com-
ing from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.
iExcessive coolant temperature triggers
a warning in the multifunction display
(page 363).
Page 143 of 481

142 Controls in detailInstrument clusterTachometer
The red marking on the tachometer de-
notes excessive engine speed.
To help protect the engine, the fuel supply
is interrupted if the engine is operated
within the red marking.
S 55 AMG and S 65 AMG
The tachometer of the S 55 AMG and
S 65 AMG does not have a red marking de-
noting excessive engine speed.
To help protect the engine, the fuel supply
is interrupted if the engine is operated at
an excessive engine speed.
Outside temperature indicator
The outside temperature is displayed in
the instrument cluster (
page 24). For in-
formation on how to select the unit of the
displayed temperature, i.e. degrees
Celsius (°C) or degrees Fahrenheit (°F),
see “Selecting temperature display mode”
(
page 163).
The temperature sensor is located in the
front bumper area. Due to its location, the
sensor can be affected by road or engine
heat during idling or slow driving. There-
fore, the accuracy of the displayed temper-ature can only be verified by comparison to
a thermometer placed next to the sensor,
not by comparison to external displays
(e.g. bank signs, etc.).
When moving the vehicle into colder ambi-
ent temperatures (e.g. when leaving your
garage), you will notice a delay before the
lower temperature is displayed.
A delay also occurs when ambient temper-
atures rise. This prevents inaccurate tem-
perature indications caused by heat
radiated from the engine during idling or
slow driving.
Clock
The time is indicated in the instrument
cluster in the tachometer display.
You can adjust the clock using the
COMAND system. Refer to separate
COMAND operating instructions.
!Avoid driving at excessive engine
speeds, as it may result in serious en-
gine damage that is not covered by the
Mercedes-Benz Limited Warranty.
Warning!
G
The outside temperature indicator is not de-
signed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
Page 144 of 481

143 Controls in detail
Control system
Control system
The control system is activated as soon as
the SmartKey in the starter switch is
turned to position1 or as soon as the
KEYLESS-GO* start/stop button
(page 35) is in position1. The control
system enables you to:
call up information about your vehicle
change vehicle settings
For example, you can use the control sys-
tem to find out when your vehicle is next
due for service, to set the language for
messages in the instrument cluster dis-
play, and much more.
The control system relays information to
the multifunction display.
Multifunction display
1Trip odometer
2Main odometer
iThe displays for the audio systems (ra-
dio, CD player etc.) will appear in En-
glish, regardless of the language
selected.
Warning!
G
A driver’s attention to the road and traffic
conditions must always be his/her primary
focus when driving.
For your safety and the safety of others, se-
lecting features through the multifunction
steering wheel should only be done by the
driver when traffic and road conditions per-
mit it to be done safely.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
Page 145 of 481
144 Controls in detailControl systemMultifunction steering wheel
The displays in the multifunction display
and the settings in the control system are
controlled using the buttons on the multi-
function steering wheel.
1
Multifunction display in the speed-
ometerOperating the control system
2
Selecting the submenu or setting the
volumeæ
up/to increase
ç
down/to decrease
3
Telephone*s
to take a call
t
to end a call
4
Menu systemsè
for next menu
ÿ
for previous menu
5
Moving within a menuj
for next display
k
for previous display
Page 146 of 481

145 Controls in detail
Control system
Pressing any of the buttons on the multi-
function steering wheel will alter what is
shown in the multifunction display.
The information available in the multifunc-
tion display is arranged in menus, each
containing a number of functions or sub-
menus.
The individual functions are then found
within the relevant menu (radio or CD op-
erations under
AUDIO
, for example). These
functions serve to call up relevant informa-
tion or to customize the settings for your
vehicle.It is helpful to think of the menus, and the
functions within each menu, as being ar-
ranged in a circular pattern.
If you press buttonè orÿ
repeatedly, you will pass through each
menu one after the other.
If you press buttonk orj
repeatedly, you will pass through each
function display, one after the other, in
the current menu.In the
SETTINGS
menu, instead of functions
you will find a number of submenus for
calling up and changing settings. For in-
structions on using these submenus, see
“Settings menu” (page 160).
The number of menus available in the sys-
tem depends on which optional equipment
is installed in your vehicle.
The menus are described on the following
pages.