320 Controls in detailSeatsRear power seat* adjustment
(rear outer seats)Example rear right door1Seat cushion tilt
2Seat backrest tilt
3Folding down and placing upright head
restraint (
page 326)
4Head restraint tilt (
page 326)
5Seat fore and aft adjustment
Switch on the ignition (
page 315).
or
Open the respective door.
Adjust desired seat using seat
switches1,2 and5.Adjusting front passenger seat from
driver’s seat/rear*
Warning!
G
The seat belt only offers its intended protec-
tion when the seat backrest is in a nearly
vertical position and the occupant is sitting
upright. Avoid sitting in positions that pre-
vent the seat belt from being properly posi-
tioned against the body (
page 339). You
should therefore adjust the backrest to a po-
sition as upright as possible.
Warning!
G
When adjusting the front passenger seat,
make sure the seat, if occupied, is as far
from the passenger front air bag as possi-
ble.
Otherwise, the passenger could be seriously
or even fatally injured in the event of an ac-
cident or braking maneuver.
Make sure no one is caught or injured while
the seat is being adjusted.
Even with the SmartKey or SmartKey with
KEYLESS-GO* removed from the starter
switch or the SmartKey with KEYLESS-GO*
removed from the vehicle, the power seats
can be operated when the respective door is
open. Therefore, do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.!
Do not move the front passenger seat com-
pletely forward if objects are stored in the parcel
net in the front passenger-side footwell. Items in
the net may be damaged.
339 Controls in detail
Fastening the seat belts
Fastening the seat belts
Warning!
G
Always fasten your seat belt before driving
off. Always make sure all of your passengers
are properly restrained, even those sitting in
the rear and pregnant women.
Failure to wear and properly fasten and
position your seat belt greatly increases
your risk of injuries and their likely severity
in an accident. You and your passengers
should always wear seat belts.
If you are ever in an accident, your injuries
can be considerably more severe without
your seat belt properly buckled. Without
your seat belt buckled, you are much more
likely to hit the interior of the vehicle or be
ejected from it. You can be seriously injured
or killed.
In the same crash, the possibility of injury or
death is lessened if you are wearing your
seat belt. The air bags can only provide the
protection they were designed to afford if
the occupants are using their seat belts
(page 45).
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 toddler restraint, or
booster seat recommended for the size and
weight of the child. For additional informa-
tion, see “Children in the vehicle”
(page 61).
A child’s risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and
the child is not properly secured in the child
restraint.Warning!
G
Never let more people ride in the vehicle
than there are seat belts available. Be sure
everyone riding in the vehicle is correctly re-
strained with a separate seat belt. Never use
a seat belt for more than one person at a
time.
341 Controls in detail
Fastening the seat belts
Proper use of seat belts
Do not twist the belt when fastening.
Adjust seat belt so that the shoulder
portion is located as close as possible
to the middle of the shoulder (it should
not touch the neck). Never pass the
shoulder portion of the belt under your
arm.
Position the lap belt as low as possible
on your hips (over hip joint) and not
across the abdomen.
Place the seat backrest in a nearly up-
right position.
Never use a seat belt for more than one
person at a time.
Do not fasten a seat belt around a per-
son and another object at the same
time. When using a seat belt to secure
infant or toddler restraints or children
in booster seats, always follow the
child seat manufacturer’s instructions.
Check your seat belt during travel to
make sure that it is properly posi-
tioned.
Make sure the seat belt is always fitted
snugly. Take special care of this when
wearing loose clothing.For more information, see “Seat belts”
(
page 55).
Seat belt height adjustment
The vehicle automatically adjusts the seat
belt height for the driver’s and front pas-
senger’s seats as well as for the rear outer
seats. Comply with the instructions on how
to properly fasten a seat belt
(page 339).
Warning!
G
Do not pass belts over sharp edges. They
could tear.
Do not allow the belt to get caught in the
door or in the seat adjustment mechanism.
This could damage the belt.
Never attempt to make modifications to
seat belts. This could impair the effective-
ness of the belts.
Do not bleach or dye seat belts as this may
severely weaken them. In a crash, they may
not be able to provide adequate protection.
Damaged seat belts or belts that were highly
stressed in an accident must be replaced.
Contact an authorized Mercedes-Benz Cen-
ter.
556 Practical hintsWhat to do if …?Problem
Possible cause/consequence
Suggested solution
59The front passenger front
air bag off indicator lamp
does not illuminate and/or
does not remain illuminat-
ed with the weight of a typ-
ical 12-month-old child in a
standard child restraint or
less on the front passen-
ger seat.
The system is malfunctioning.
Make sure there is nothing between seat cushion and child seat and
check installation of the child seat.
Make sure no objects applying supplemental weight onto the seat
are present.
Make sure no objects which apply forces to the seat are present
(e.g. objects such as books, briefcases etc. lodged behind or around
the seat, head restraints pushing against roof etc.). The system may
recognize such forces as supplemental weight.
If the front passenger front air bag off indicator lamp remains out,
have the system checked as soon as possible by an authorized
Mercedes-Benz Center. Do not transport a child on the front pas-
senger seat until the system has been repaired.
Also read and observe any messages in the multifunction display
and follow corrective steps (
page 564).
Warning!
G
If the59indicator lamp does
not illuminate or remains out with the
weight of a typical 12-month-old child in a
standard child restraint or less on the front
passenger seat, do not transport a child on
the front passenger seat until the system
has been repaired.
564 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Front passenger
airbag enabled
See Oper. Manual
Front passenger front air bag is
activated while driving even
though a child, small individual,
or object below the system’s
weight threshold is on the front
passenger seat, or the front pas-
senger seat is empty. Objects
on the seat or forces acting on
the seat may make the system
sense supplemental weight.
Stop the vehicle in a safe location as soon as possible and check the front
passenger seat for the following:
Switch off the ignition (
page 315).
Remove child and child restraint from front passenger seat and properly
secure the child in rear seat employing the child restraint if necessary.
Remove any other items from on and around the front passenger seat and
make sure the storage bag on the back of the front passenger seat is emp-
ty.
Make sure that no objects which apply forces to the seat are present (e.g.
objects such as books, briefcases etc. lodged behind or around the seat,
head restraints pushing against roof etc.). The system may recognize such
forces as supplemental weight and sense that an occupant on the front
passenger seat is of a greater weight than actually present.
Keep the seat unoccupied, close the front passenger door and switch on
the ignition (
page 315).
Monitor the 59indicator lamp right of the instrument cluster
(
page 53) and the multifunction display in the instrument cluster
(page 241) for the following:
(Continued on next page)
677 Technical terms
Restraint systems
Seat belts, belt tensioners, air bags
and child restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.
Rim
(
page 527)
Root directory
The uppermost directory on a storage
medium.
Run Flat Indicator
The Run Flat Indicator monitors the set
tire inflation pressures by evaluating
each wheel’s rotational speed. If a
wheel’s rotational speed changes due
to falling tire inflation pressure, a corre-
sponding warning message appears in
the ->Instrument cluster control sys-
tem.RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line’s ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as AN-
TI-KNOCK INDEX.
Sidewall
(
page 527)
SIM
(Subscriber I
dentity M
odule)
Card provided by the ->GSM telephone
service provider. Necessary for access-
ing a mobile communication network.
SMS
(S
hort M
essage S
ervice)
With this function you can receive, read
and delete short text messages (if SMS
service is provided by your carrier).SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and air bags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.
Tele Aid
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, Roadside Assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call. The Tele Aid system is oper-
ational provided that the vehicle’s
battery is charged, properly connected,
not damaged and mobile phone and
->GPS coverage is available.
Telematics
A combination of the terms “telecom-
munications” and “informatics.”
682 IndexChildren in the vehicle 61
Air bags 61
Indicator lamp front passenger front air
bag off 53, 555
Indicator lamp, front passenger front
air bag off 53
Infant and child restraint systems 62
LATCH-type child seat anchors 65
Override switch for rear passenger
compartment 67
Tether attachment points 64
Cigarette lighter 457
Cloth upholstery, Cleaning and care
of 542
Cockpit 26, 671
Cockpit management and data system see
COMAND
COMAND 671
Adjusting volume 89
Components 79
Controller 82
Display 80
Function buttons 80
Main menus 89
Menu overview 84
Navigation system 140Operating 84
Operating safety 78
Operating seats 236
Phone book* 129
Radio, FM/AM 93
Selecting sound settings 90
SMS messages 137
Surround sound 91
Switching off/on the audio
source 92
Switching on or off 79
Swiveling display 81
system settings 213
Telephone keypad* 82
Telephone menu* 115
Vehicle menu 220
Voice Control* settings 215
Combination switch 346
Corner-illuminating lamps 347
High beam 346
High beam flasher 347
Turn signals 362
Windshield wipers 351
Command list (Voice Control*) 288
Address book commands 293
Audio commands 295General commands 288
Navigation commands 290
Telephone* commands 289
Control system instrument cluster 241
Multifunction display 241
Multifunction steering wheel 242
Control system instrument cluster menus
Assistance* 252
Audio 248
Navi 246
Service 253
Settings 254
Telephone* 249
Trip 245
Vehicle status message memory 253
Controller Area Network see CAN system
Coolant 497
Adding 498
Anticorrosion/antifreeze mixing ratio
and quantity 665
Checking level 497
Messages in display 587
Temperature 488
Temperature gauge 29, 378
Coolant level
Checking 497
688 IndexInfant and child restraint systems see Chil-
dren in the vehicle
Inflation pressure see Tires
Infrared reflecting windshield 475
Inside door handle 312
Instrument cluster 28, 378, 674
Cleaning 541
Coolant temperature gauge 378
Illumination 81, 378
Lamps 544
Multifunction display 241
Outside temperature indicator 379
Selecting the language
(COMAND) 216
Interior lighting 348
Activating automatic control 349
Ambient lighting (COMAND) 225
Deactivating automatic control 349
Delayed switch-off (COMAND) 226
In the rear 350
Reading lamps in the front 349
Reading lamps in the rear 350
Interior rear view mirror
Adjusting 332
Auto-dimming 334Interior storage spaces see Storage com-
partments
J
Jack 612, 630
Jacking up the vehicle 630
Jump starting 639
K
Key, Mechanical 614
Loss of 311
Key, SmartKey 304
Battery check lamp 304, 305
Factory setting 305
Global locking and unlocking 305
Lock button 304
Locking and unlocking 304
Loss of 311
Messages in display 593
Opening button for trunk 304
Panic button 68
Remote control 304
Restoring to factory setting 306
Selective setting 305
Starting the engine 359
Switching on ignition with 315Turning off engine 366
Unlock button 304
Key, SmartKey with KEYLESS-GO* 306
Battery check lamp 306, 310
Closing, Trunk 440
Factory setting 309
Global locking and unlocking 309
Important notes on using
KEYLESS-GO* 308
Lock button 306
Locking and unlocking 306
Locking using the lock button on door
or on trunk lid 310
Loss of 311
Messages in display 592
Opening button for trunk 306
Panic button 68
Remote control 306
Restoring to factory setting 310
Selective setting 310
Starting the engine 360
Switching on ignition with 317
Turning off engine 366
Unlock button 306
Kickdown 373, 674
Kilopascal 527