Page 84 of 474

83 Safety and Security
Occupant safety
Once the top tether anchorage hook is
attached, the child restraint itself can be
secured. Tighten the top tether strap
according to the child restraint
manufacturer’s instructions.
Reinstall cover1 after removing the
tether strap.Child seat anchors – LATCH-type
This vehicle is equipped with two LATCH-
(L
ower A
nchors and T
ethers for CH
ildren)
type anchors (at each of the outer rear
seats) for the installation of a LATCH-type
child seat with the matching mounting
fittings.
iFor safety, make sure the hook has
attached to the ring beyond the safety
catch, as illustrated.
Warning!
G
Children too big for a toddler restraint must
ride in seats using regular seat belts.
Position shoulder belt across chest and
shoulder, not face or neck.
A booster seat may be necessary to achieve
proper belt positioning for children from
41 lbs until they reach a height where a
lap/shoulder belt fits properly without a
booster.
Install child seat according to manufactur-
er’s instructions.
T h e c h i l d s e a t m u s t b e f i r m l y a t t a c h e d i n t h e
right and left side anchors1.
An incorrectly mounted child seat may come
loose during an accident which could result
in serious injury or death to the child.
Damaged or impact damaged child seats or
child seat mounting fittings must be
replaced.
Do not leave children unattended in the
vehicle, even if the children are secured in a
child restraint system.
Page 358 of 474

357 Practical hints
What to do if …
Problem
Possible cause/conse-
quence
Suggested solution
56
The front passenger front
air bag off indicator lamp
does not illuminate
and/or does not remain
illuminated with the
weight of a typical
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 that no objects applying supplemental
weight onto the seat are present.
If the front passenger front air bag off indicator lamp
remains out, have the system checked as soon as pos-
sible by an authorized Mercedes-Benz dealer. Do not
transport a child on the front passenger seat until the
system has been repaired.
Also note any messages in the multifunction display
and follow corrective steps (
page 364).
Warning!
G
If the 56indicator 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.
Page 365 of 474

364 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
Front-pass.
airbag
activated
See Operator’s
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 passenger seat is
empty. Objects on the seat or
forces acting on the seat may
make the system sense supple-
mental 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 33).
Remove child and child restraint from front passenger seat and proper-
ly secure the child in rear seat employing the child restraint if neces-
sary.
Make sure that no objects applying supplemental weight onto the seat
are present. The system may recognize such 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 33).
(Continued on next page)
Page 454 of 474

453 Technical terms
PSI
(P
ounds per s
quare i
nch) (
page 333)
Recommended tire inflation pressure
(
page 333)
Restraint systems
Seat belts, child restraints, lower
anchors and tethers for children
(LATCH). As independent systems,
their protective functions complement
one another.
Rim
(page 333)
RON
(Research 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 deto-
nation (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Shift lock
When the vehicle is parked, this lock
prevents the transmission gear
selector lever from being moved out of
positionP without SmartKey turned
and brake pedal depressed.
Sidewall
(
page 333)
SRS
(Supplemental R
estraint S
ystem)
Air bags, air bag control unit (with
crash sensor), emergency tensioning
device. Though independent systems,
they are closely interfaced to provide
effective occupant protection.Tele Aid* System
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and
manual emergency, roadside assis-
tance and information. Tele Aid is
initially activated by completing a
subscriber agreement and placing an
acquaintance call.
The Tele Aid system is operational
provided that the vehicle’s battery is
charged, properly connected, not
damaged and cellular and GPS
coverage is available.
Page 456 of 474

455 Index
A
ABS 25, 87, 449
Indicator lamp 350
Messages in display 360
Accelerator position,
automatic transmission* 165
Accessory weight 331
Accident
In case of 56
Active head restraints
see Head restraints
Additional turn signals 398
Air bags 63
Children 64
Front passenger front air bag off
indicator lamp 27, 80, 356
Front, Driver 67
Front, Passenger 67
Passenger 67
Safety guidelines 66
Side impact (front and rear*) 68
Window curtain 68
Air conditioning refrigerant 442Air conditioning system
Automatic climate control*
(Canada only) 186
Climate control 176
Air conditioning, Cooling
Automatic climate control*
(Canada only) 196
Climate control 183
Air distribution
Automatic climate control*
(Canada only) 190
Climate control 180
Air pressure see Tire inflation pressure
Air recirculation mode
Automatic climate control*
(Canada only) 192
Climate control 182
Air vents, Front
Automatic climate control*
(Canada only) 187
Climate control 177
Air vents, Rear
Automatic climate control*
(Canada only) 198
Climate control 185Air volume
Automatic climate control*
(Canada only) 191
Climate control 180
Alignment bolt (vehicle tool kit) 408, 449
Anticorrosion/antifreeze 446, 447
Antiglare, Rear view mirror 170
Anti-theft systems 93
Anti-theft alarm system* 93
Immobilizer 93
Tow-away alarm* 95
Aquaplaning see Hydroplaning
Armrest 258
Ashtrays 261
Aspect ratio 331
ATF (Automatic transmission fluid) 300
AUDIO menu (Control system) 136
Audio system 199
Audio and telephone, operation 199
Button and soft key operation 202
CD changer* with MP3 218
CD operation 216
Page 458 of 474

457 Index
Brake lamps
Cleaning lenses 344
Messages in display 377
Replacing bulbs 403
Brake pads
Message in display 370
Brakes 284
Warning lamp 25, 351
Break-in period 282
Bulbs, replacing see Replacing bulbs
C
CAC 449
California retail buyers and lessees,
important notice 11
CAN system 449
Cargo area see Trunk
Cargo tie-down rings* 256
Carpets, cleaning 347
Catalytic converter 291
CD changer* 216
CD player* 137, 216
Centigrade see Temperature display
mode 142Central locking
Automatic 107, 152
From inside 107
Locking/unlocking from inside 107
Switch 107
Certification label 428
Charcoal filter
Automatic climate control*
(Canada only) 194
Children in the vehicle 74
Air bags 64
Blocking rear door window
operation 85
Indicator lamp, front passenger
air bag 80, 356
Infant and child restraint systems 74
LATCH-type child seat anchors 83
Occupant Classification System
(OCS) 77
Cigarette lighter 262
Climate control system 176
Control panel 177
Defrosting, Front 181
Rear window defroster 175Clock 25, 130
Setting time 145, 146
Cockpit 22, 449
Cockpit Management and Data System
see COMAND
Cold tire inflation pressure 331
Collapsible wheel chock 386
COMAND* 449
COMAND* see separate COMAND
operating instructions
Combination switch 52, 122
Control system 130, 450
Multifunction display 130
Multifunction steering wheel 131
Resetting to factory default 140
Control system menu 130, 450
AUDIO 136
Menus overview 133
NAV* 138
Settings 140
Standard display 135
TEL* 157
Trip computer 155
Vehicle status message
memory 138
Page 463 of 474

462 IndexHead unit
Time synchronization* with 145
Headlamp cleaning system* 170, 303,
441
Headlamp shut-off delay see Delayed
shut-off, Exterior lamps
Headlamps
Automatic headlamp mode 119
Bi-Xenon* 402, 449
Cleaning lenses 344
Halogen 400
High beam see High beam flasher
High beam see High beam headlamps
Low beam see Low beam headlamps
Manual headlamp mode 119
Messages in display 377, 378, 379
Replacing bulbs 397
Switch 52, 59
Headliner and shelf below rear window
Cleaning and care of 347
Heated seats* 113
High beam flasher 52, 122High beam headlamps 52, 122
Indicator lamp 25
Messages in display 378
Replacing bulbs 398, 401
High mounted brake lamp 399
Hood 297
Message in display 376
Horn 23
HVAC see Climate control
Hydroplaning 287
I
Identification labels 428
Identification number, Vehicle (VIN) 428
Ignition 33, 49
Immobilizer 93
Indicator lamps see Lamps, indicator and
warning
Infant and child restraint systems see
Children in the vehicle
Inflation pressure see Tires, Inflation
pressures
Inside door handle 102Instrument and controls see Instrument
cluster
Instrument cluster 24, 127, 451
Cleaning 346
Illumination brightness 127
Lamps 350, 355
Messages in display see Malfunction
display messages
Multifunction display 130
Instrument lighting see Instrument cluster,
Illumination brightness
Instruments and controls see Cockpit
Interior lighting 125
Delayed shut-off 152
Interior rear view mirror 43
Antiglare positions 170
Auto-dimming mirrors* 171
Interior storage spaces see Storage
compartment
Page 466 of 474

465 Index
Multifunction display messages
ABS 360
Brake fluid 370
Brake lamps 377
Brake pads 370
Coolant 371, 372, 373
Cruise control 374
Display 374
Door 374
Engine coolant 371, 372, 373
Engine oil 375
ESP
®
361, 362
Fog lamps 377, 379
Front passenger front
air bag 364, 367
Fuel cap 352, 376
Headlamps 378, 379
Hood 376
Key, SmartKey 376
Lamps, exterior 377–380
Parking brake 370
Parking lamp 379
Seat belt system 381
SRS 363
Steering gear oil 381Tele Aid* 382
Telephone* 382
Tilt/sliding sunroof* 382
Trunk 382
Turn signals 380
Windshield washer fluid 382
Multifunction steering wheel 26, 131,
452
Button operation 131
N
Navigation system* 138
See separate COMAND* operating
instructions
Net, parcel 258
Neutral gear position, Automatic
transmission* 162
Neutral gear position, Manual
transmission 161
New vehicle break-in 282
Night security illumination 121
Setting 151
Normal occupant weight 332
Number, vehicle identification (VIN) 428O
Occupant Classification System see OCS
Occupant distribution 332
Occupant safety 62
Air bags 63
Children and air bags 64
Children in the vehicle 74
Fastening the seat belt 45
Front passenger front air bag off
indicator lamp 80, 356
Infant and child restraint systems 74
LATCH-type child seat anchors 83
OCS 77
Seat belts 45, 66
OCS 77, 452
Self-test 81
Odometer 130
Oil level see Engine oil level, Checking oil
level
Oil see Engine oil
One-touch gearshifting
(Automatic transmission*) 168
Canceling gear range limit 169
Downshifting 169
Upshifting 169