Page 78 of 506

76 Safety and SecurityOccupant safetyWhen the OCS senses that the front passen-
ger seat occupant is classified as being
heavier than the weight of a typical
12-month-old child seated in a standard
child restraint or as being a small individual
(such as a young teenager or a small adult),
the 75 indicator lamp will illumi-
nate for approximately six seconds when
the engine is started and then, depending on
occupant weight sensor readings from the
seat, remain illuminated or go out. With the
75 indicator lamp illuminated, the
front passenger front air bag is deactivated.
With the 75 indicator lamp out,
the front passenger front air bag is activat-
ed.
When the OCS senses that the front passen-
ger seat occupant is classified as an adult or
someone larger than a small individual, the
75 indicator lamp will illuminate
for approximately six seconds when the en-
gine is started and then go out, indicating
that the front passenger front air bag is acti-
vated.
If the 75 indicator lamp is illumi-
nated, the front passenger front air bag is
deactivated and will not be deployed.
If the 75 indicator lamp is not illu-
minated, the front passenger front air bag is
activated and will be deployed:
in the event of certain frontal impacts
if impact exceeds a preset deployment
threshold
independently of the side impact
air bags.
If the front passenger front air bag is de-
ployed, the rate of inflation will be influ-
enced by:
the rate of relevant vehicle deceleration
as assessed by the air bag control unit
front passenger's weight category as
identified by the Occupant Classification
System (OCS).
Warning!
G
According to accident statistics, children
are safer when properly restrained in the
rear seating positions than in the front seat-
ing position. Thus, we strongly recommend
that children be placed in the rear seats
whenever possible. Regardless of seating
position, children 12 years old and under
must be seated and properly secured in an
appropriate infant or child restraint recom-
mended for the size and weight of the child.
The infant or child restraint must be properly
secured with the vehicle's seat belt, the seat
belt and top tether strap, or lower anchors
and top tether strap, fully in accordance
with the child seat manufacturer's instruc-
tions.
Page 120 of 506

118 Controls in detailLocking and unlocking
Briefly press emergency release
button1.
The trunk unlocks and the trunk lid
opens.
Illumination of the emergency release but-
ton:
The button will flash for 30 minutes af-
ter opening the trunk.
The button will flash for 60 minutes af-
ter closing the trunk.
Automatic central locking
The doors and the trunk automatically lock
when the ignition is switched on and the
wheels are turning at vehicle speeds of ap-
proximately 9 mph (15 km / h) or more.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
iThe emergency release button unlocks
and opens the trunk while the vehicle is
standing still or in motion.iThe emergency release button does
not open the trunk lid, if the vehicle
battery is discharged or disconnected.
iIf the emergency release button is
pressed and the vehicle was centrally
locked from the outside using the
SmartKey, the exterior lamps will flash
and the alarm will sound as the trunk
lid opens.
To cancel the alarm, do one of the fol-
lowing:
Insert the SmartKey in the starter
switch.
Press button Œ or ‹ on the
SmartKey.
In vehicles with KEYLESS-GO*
Grasp the outside door handle.
The SmartKey with KEYLESS-GO
must be within 3 ft (1 m) of the ve-
hicle.
Press the KEYLESS-GO* start/stop
button (
page 35).
The SmartKey with KEYLESS-GO
must be inside the vehicle.
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle automatically locks when
the ignition is switched on and the
wheels are turning at vehicle speeds of
approximately 9 mph (15 km / h) or
more. You could therefore lock yourself
out when the vehicle
is pushed or towed
is on a test stand
Page 144 of 506

142 Controls in detailInstrument clusterA full view illustration of the instrument
cluster can be found in the “At a glance”
section of this manual (
page 24).
The instrument cluster is activated when
you
open a door
turn on the ignition
press the reset button (
page 24)
switch on the exterior lamps
You can change the instrument cluster set-
tings in the instrument cluster submenu of
the control system (
page 157).
Instrument cluster illumination
Use the reset button (
page 24) to adjust
the illumination brightness for the instru-
ment cluster.
To brighten illumination
Turn the reset button in the instrument
cluster clockwise (
page 24).
The instrument cluster illumination will
brighten.To dim illumination
Turn the reset button in the instrument
cluster counterclockwise (
page 24).
The instrument cluster illumination will
dim.
iThe instrument cluster illumination is
dimmed or brightened automatically to
suit ambient light conditions.
The instrument cluster illumination will
also be adjusted automatically when
you switch on the vehicle’s exterior
lamps.
Page 145 of 506

143 Controls in detail
Instrument cluster
Coolant temperature indicator
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious en-
gine damage which is not covered by the
Mercedes-Benz Limited Warranty.
Trip odometer
Make sure you are viewing the trip odome-
ter display (
page 145).
If it is not displayed, press the è or
ÿ repeatedly until the trip odome-
ter appears.
Press and hold the reset button on the
instrument cluster (
page 24) until
the trip odometer is reset.
Warning!
G
Driving when your engine is overheated
can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously
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 trigger
a warning in the multifunction display
(page 361).
Page 151 of 506
149 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Menu6
Menu7
Menu8
Standard
display
AUDIO
NAV*
Distronic*
Vehicle status
message mem-
ory
Settings
Trip computer
Telephone
(page 150)
(page 150)
(page 152)
(page 152)
(page 153)
(page 154)
(page 170)
(page 171)
Commands/submenusDigital speed-
ometer
Select radio
station
Activate
route guid-
ance
Call up set-
tings
Call up vehicle
malfunction,
warning and sys-
tem status mes-
sages stored in
memory
Reset to factory
settings
Fuel consumption
statistics after
start
Load phone
book
Call up main-
tenance sys-
tem display
Operate CD
player
Instrument clus-
ter submenu
Fuel consumption
statistics since
the last reset
Search for
name in
phone book
Check tire
pressure*
Time/Date sub-
menu
Call up range
Check engine
oil level
Lighting sub-
menuVehicle sub-
menuConvenience
submenuDynamic seat*
submenu
Page 153 of 506

151 Controls in detail
Control system
Select satellite radio station*
The satellite radio is treated as a radio ap-
plication.
Select SAT radio with the correspond-
ing softkey in the radio menu.
1SAT mode and preset number
2Setting for station selection using
memory
3Channel name or number
Press buttonk orj repeatedly
until the desired channel is found.Operate the CD player
Turn on the radio and select the CD
player. Refer to separate operating in-
structions.
Press buttonè orÿ repeatedly
until the settings for the CD currently
being played are shown in the display.
1Current CD (for CD changer*)
2Current track
Press buttonk orj repeatedly
until the desired track is selected.
iYou can only store new stations using
the corresponding feature on the radio,
see separate operating instructions.
You can also operate the radio in the
usual manner.
iAdditional optional satellite radio
equipment and a subscription to satel-
lite radio service provider are required
for satellite radio operation. Contact an
authorized Mercedes-Benz Center for
details and availability for your vehicle.
For more information, refer to separate
COMAND operating instructions.
iTo select a CD from the magazine,
press a number on the COMAND
system SmartKey pad located in the
center console.
Page 154 of 506

152 Controls in detailControl systemNAV* menu
The
Nav
menu contains the functions
needed to operate your navigation system.
Press buttonè orÿ repeatedly
until you see the message
NAV
in the
display.
If the navigation system is switched off,
the message
NAV off
is shown in the
display.
If the navigation system is switched on,
the message
NAV Active
is shown in
the display.
Please refer to the COMAND manual for in-
structions on how to activate the route
guidance system.
Distronic* menu
Use the Distronic menu to display the cur-
rent settings for your Distronic system.
What information is shown in the display
depends on whether the Distronic system
is active or inactive.
Please refer to the “Driving systems” sec-
tion of this manual (
page 235) for in-
structions on how to activate Distronic.
Press buttonè orÿ repeatedly
until you see one of the following two
pictures in the display.Distronic deactivated
When Distronic is deactivated, you will see
the standard display in the display.
1Vehicle ahead, if detected
2Actual distance to vehicle ahead
3Preset distance threshold to vehicle
ahead
4Your vehicle
5Symbol for activated distance warning
function
Page 156 of 506

154 Controls in detailControl system
Press buttonk orj.
The stored messages will now be dis-
played in the order in which they have
occurred. For malfunction and warning
messages, see “Vehicle status messag-
es in the multifunction display”
(page 367).
Should the vehicle’s system record any
conditions while driving, the number of
messages will reappear in the multifunc-
tion display when the SmartKey in the
starter switch is turned to position0 or re-
moved from the starter switch.
Settings menu
In the
Settings
menu there are two func-
tions:
The function
To reset: Press reset
button for 3 seconds
, with which you
can reset all the settings to the original
factory settings.
A collection of submenus with which
you can make individual settings for
your vehicle.
Press buttonè orÿ repeatedly
until the
Settings
menu is seen in the
display.Resetting all settings
You can reset all the functions of all sub-
menus to the factory settings.
Press the reset button in the instru-
ment cluster (
page 24) for approxi-
mately three seconds.
In the display you will see the request
to press the reset button again to con-
firm.
Press the reset button again.
The functions of all the submenus will
reset to factory settings.
iThe vehicle status message memory
will be cleared when you turn the
SmartKey in the starter switch to
position1 or2. You will then only see
high priority messages in the multifunc-
tion display (
page 367).
iThe settings you have changed will not
be reset unless you confirm the action
by pressing the reset button a second
time.