1, 2, 3 ...
4ETS see ETS/4ETS (Electronic Trac-
tion System)
4MATIC (permanent four-wheel
drive) .................................................. 248
12 V socket
see Sockets
115 V socket ...................................... 385
360° camera
Cleaning .........................................4 16
Function/notes ............................ .260 A
ABS (Anti-lock Braking System) Display message ............................ 317
Function/notes ................................ 76
Important safety notes .................... 77
Warning lamp ................................. 358
Accident
Automatic measures after an acci-
dent ................................................. 68
Activating/deactivating cooling
with air dehumidification ................. 170
Activating/deactivating Night
View Assist Plus
With spotlight function ................... 268
Active Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 309
Display message ............................ 344
Function/informatio n.................... 270
Active Body Control (ABC)
Display message ............................ 342
Function/note s............................. 244
Active Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 310
Display message ............................ 343
Function/information .................... 273
Active multicontour seat .................. 134
Active Parking Assist
Detecting parking spaces .............. 252
Display message ............................ 344
Exiting a parking space .................. 254
Function/note s............................. 251 Important safety notes .................. 251
Parking .......................................... 253
ADAPTIVE BRAKE ................................. 84
Adaptive Brake Assist
Function/note s................................ 81
Adaptive Damping System (ADS) ..... 247
Adaptive Highbeam Assist Plus
Display message ............................ 336
Function/note s............................. 153
Switching on/of f........................... 154
Additional speedometer ................... 313
Additives (engine oil) ........................ 492
Air bags
Belt bags .......................................... 53
Cushion air bags .............................. 59
Deployment ..................................... 65
Display message ............................ 332
Front air bag (driver, front
passenger) ....................................... 57
Important safety notes .................... 56
Introduction ..................................... 56
Knee bag .......................................... 58
PASSENGER AIR BAG indicator
lamps ............................................... 50
Side impact air ba g.......................... 58
Window curtain air ba g.................... 59
Air vents
Glove box ....................................... 185
Important safety notes .................. 184
Rear ............................................... 185
Setting ........................................... 184
Setting the center air vents ........... 184
Setting the side air vents ............... 184
Air-conditioning system
see Climate control
AIRMATIC
Display message ............................ 341
Function/note s............................. 246
Alarm
ATA (Anti-Theft Alarm system )......... 86
Switching off (ATA) .......................... 86
Switching the function on/off
(ATA) ................................................ 86
Alarm system
see ATA (Anti-Theft Alarm system)
Anti-lock braking system
see ABS (Anti-lock Braking System) 4
Index
Locking (SmartKey) .......................... 91
Lowering ........................................ 470
Maintenance .................................... 26
Operating safety .............................. 27
Parking for a long period ................ 223
Pulling away ................................... 192
Raising ........................................... 467
Reporting problems ......................... 29
Securing from rolling away ............ 466
Towing away .................................. 435
Transporting .................................. 437
Unlocking (in an emergency) ........... 98
Unlocking (SmartKey) ...................... 91
Vehicle data ................................... 495
Vehicle dimensions ........................... 495
Vehicle emergency locking ................ 99
Vehicle Homepage
Data protection .............................. 219
Functions ....................................... 220
General information ....................... 219
Internet connection ....................... 220
Vehicle identification number
see VIN
Vehicle identification plate .............. 488
Vehicle level
Active Body Control ABC ............... 244
Display message ............................ 341
Vehicle maintenance
see ASSYST PLUS
Vehicle tool kit .................................. 422
Video
Operating the DVD ......................... 305
VIN ...................................................... 488 W
Warning Stickers ........................................... 46
Warning and indicator lamps
ABS ................................................ 358
Brakes ........................................... 357
Check Engine ................................. 363
Coolant .......................................... 364
Distance warning ........................... 367
ESP ®
.............................................. 360
ESP ®
OFF ....................................... 361
Fuel tank ........................................ 363
Hybrid system ................................ 366 Overview .......................................... 36
Parking brake ................................ 362
PASSENGER AIR BAG ...................... 50
RBS (Recuperative Brake Sys-
tem) ............................................... 366
Reserve fue
l................................... 363
Restraint system ............................ 362
Seat belt ........................................ 355
Steering ......................................... 369
Tire pressure monitor .................... 368
Warranty .............................................. 25
Washer fluid
Display message ............................ 353
Wheel and tire combination
see Tires
Wheel bolt tightening torque ........... 470
Wheel chock ...................................... 466
Wheels
Changing a whee l.......................... 465
Checking ........................................ 443
Cleaning ......................................... 414
Important safety notes .................. 442
Interchanging/changing ................ 465
Mounting a new whee l................... 470
Mounting a whee l.......................... 466
Removing a whee l.......................... 469
Storing ........................................... 466
Tightening torque ........................... 470
Wheel size/tire size ....................... 471
Window curtain air bag
Operation ......................................... 59
Windows
see Side windows
Windshield
Defrosting ...................................... 175
Infrared reflective .......................... 401
Windshield washer fluid
see Windshield washer system
Windshield washer system
Adding washer fluid ....................... 409
Notes ............................................. 494
Windshield wipers
Problem (malfunction) ................... 161
Replacing the wiper blades ............ 158
Switching on/of f........................... 157
Winter driving
Important safety notes .................. 444
Slippery road surfaces ................... 228 22
Index
Window curtain air bags
Window curtain air bags
:are integrated
into the side of the roof frame and deployed in
the area from the A-pillar to the C-pillar.
When deployed, the window curtain air bag
enhances the level of protection for the head.
However, it does not protect the chest or
arms.
In the event of a side impact, the window cur-
tain air bag is deployed on the side on which
the impact occurs.
If the system determines that they can offer
additional protection to that provided by the
seat belt, a window curtain air bag may be
deployed in other accident situations
(Y page 65).
Cushion air bags i
Observe the "Important safety notes" sec-
tion (Y page 56).
The rear reclining seat is equipped with a
cushion air bag. If the seat backrest is
reclined, the cushion air bag can provide addi-
tional occupant protection in the event of
frontal collision situations. When triggered,
the cushion air bag deploys under the seat
cushion. This helps prevent the occupant
from slipping off the seat cushion. G
WARNING
If a child restraint system is installed and the
seat backrest is reclined too far backwards,
the cushion air bag may deploy by mistake in the event of an accident. There is an increased
risk of injury. When using a child restraint system, always
ensure that the seat is correctly adjusted and
that the backrest is almost vertical.
If you install a child restraint system on the
rear reclining seat, always observe: R the instructions and safety notes in "Chil-
dren in the vehicle" (Y page 69)
R the child restraint system manufacturer's
installation instructions. Occupant Classification System
(OCS)
Introduction The Occupant Classification System (OCS)
categorizes the person in the front-passenger
seat. Depending on that result, the front-
passenger front air bag is either enabled or
deactivated.
The system does not deactivate:
R the side impact air bag
R the window curtain air bag
R the Emergency Tensioning Devices
Prerequisites To be classified correctly, the front passenger
must sit:
R with the seat belt fastened correctly
R in an almost upright position with their
back against the seat backrest
R with their feet resting on the floor, if possi-
ble
If the front passenger does not observe these
conditions, OCS may produce a false classi-
fication, e.g. because the front passenger:
R transfers their weight by supporting them-
selves on a vehicle armrest
R sits in such a way that their weight is raised
from the seat cushion
If it is absolutely necessary to install a child
restraint system on the front-passenger seat,
be sure to observe the correct positioning of Occupant safety
59Safety Z
Vehicles with belt bags:
the belt bags are
also deployed depending on the type and
severity of the accident.
Vehicles with a rear reclining seat: the
Emergency Tensioning Device is only trig-
gered if the belt buckle tongue is engaged in
the belt buckle.
If the seat backrest is reclined, the cushion air bag will also be deployed depending on the
type and severity of the accident.
If the restraint system control unit detects a
more severe accident, further components of the restraint system are activated independ-
ently of each other in certain frontal collision
situations:
R Front air bags and driver's knee bag
R Window curtain air bag, if the system deter-
mines that deployment can offer additional protection to that provided by the seat belt
The front-passenger front air bag is activated
or deactivated depending on the person on
the front-passenger seat. The front-
passenger front air bag can only deploy in an accident if the PASSENGER AIR BAG ON indi-
cator lamp is lit. Observe the information on
the PASSENGER AIR BAG indicator lamps
(Y page 50).
Your vehicle has two-stage front air bags.
During the first deployment stage, the front
air bag is filled with propellant gas to reduce
the risk of injuries. The front air bag is fully
deployed with the maximum amount of pro-
pellant gas if a second deployment threshold
is reached within a few milliseconds.
The activation threshold of the Emergency
Tensioning Devices and the air bag are deter-
mined by evaluating the rate of vehicle decel-
eration or acceleration which occurs at vari-
ous points in the vehicle. This process is pre- emptive in nature. Deployment should take
place in good time at the start of the collision. The rate of vehicle deceleration or accelera-
tion and the direction of the force are essen-
tially determined by:
R the distribution of forces during the colli-
sion
R the collision angle
R the deformation characteristics of the vehi-
cle
R the characteristics of the object with which
the vehicle has collided
Factors which can only be seen and measured
after a collision has occurred do not play a
decisive role in the deployment of an air bag.
Nor do they provide an indication of air bag
deployment.
The vehicle can be deformed considerably,
without an air bag being deployed. This is the
case if only parts which are relatively easily
deformed are affected and the rate of decel-
eration is not high. Conversely, air bags may
be deployed even though the vehicle suffers
only minor deformation. This is the case if, for example, very rigid vehicle parts such as lon-
gitudinal body members are hit, and sufficient deceleration occurs as a result.
If the restraint system control unit detects a
side impact or that the vehicle is rolling over,
the relevant restraint system components are activated independently of one another
depending on the apparent type of accident.
If the system determines a need for additional
protection for the vehicle occupants, the
Emergency Tensioning Devices are triggered.
R Side impact air bags on the side of impact,
independently of the Emergency Tension-
ing Device and the use of the seat belt on
the driver's seat and outer seats in the sec-
ond row 66
Occupant safetySafety
The side impact air bag on the front-
passenger side (front) deploys in the fol-
lowing situations:
- the OCS system detects that the front-
passenger seat is occupied or
- the belt tongue is engaged in the belt
buckle of the front-passenger seat
R Window curtain air bag on the side of
impact, independently of the use of the
seat belt and independently of whether the front-passenger seat is occupied
R Window curtain air bags on the driver's and
front-passenger side in certain situations
when the vehicle rolls over, if the system
determines that deployment can offer addi-
tional protection to that provided by the
seat belt
i Not all air bags are deployed in an acci-
dent. The different air bag systems work
independently of each other.
How the air bag system works is deter-
mined by the severity of the accident detec- ted, especially the vehicle deceleration or
acceleration and the apparent type of acci-dent:
R frontal collision
R side impact
R rollover PRE-SAFE
®
(anticipatory occupant
protection system)
Introduction In certain hazardous situations, PRE-SAFE
®
takes pre-emptive measures to protect the
vehicle occupants.
Important safety notes !
Make sure that there are no objects in the
footwell under or behind the seats when
moving the seats back. There is a risk that
the seats and/or the objects could be dam-
aged. Despite your vehicle being equipped with the
PRE-SAFE ®
system, the possibility of per-
sonal injuries occurring as a result of an acci- dent cannot be eliminated. Always adapt your
driving style to suit the prevailing road and
weather conditions and maintain a safe dis-
tance from the vehicle in front. Drive care-
fully.
Function PRE-SAFE
®
intervenes:
R in emergency braking situations, e.g. when
BAS is activated
R in critical driving situations, e.g. when phys-
ical limits are exceeded and the vehicle
understeers or oversteers severely
R vehicles with the Driving Assistance pack-
age: when a driver assistance system inter-
venes powerfully or the radar sensor sys-
tem detects an imminent danger of colli-
sion in certain situations
PRE-SAFE ®
takes the following measures
depending on the hazardous situation detec-
ted:
R the front seat belts are pre-tensioned.
R if the vehicle skids, the panorama roof with
power tilt/sliding panel and the side win-
dows are closed so that only a small gap
remains.
R the front-passenger seat is adjusted if it is
in an unfavorable position.
R for vehicles with electrically adjustable rear
seats: the outer rear seats are adjusted if
they are in an unfavorable position.
R vehicles with a multicontour seat: the air
pressure in the side bolsters of the seat
backrest is increased.
R vehicles with seat belt extenders: the seat
belts of the outer rear seats are pre-ten-
sioned.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
slackens
the belt pre-tensioning. On vehicles with mul-
ticontour seats, the air pressure in the side Occupant safety
67Safety Z
Display messages
Possible causes/consequences and
M
MSolutions 6
Left Side Curtain Left Side Curtain
Airbag Airbag
Malfunction
Malfunction
Service Required
Service Required
or Right Side Cur‐ Right Side Cur‐
tain Airbag Mal‐
tain Airbag Mal‐
function Service function Service
Required Required There is a malfunction in the left-hand or right-hand window cur-
tain air bag. The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be trig-
gered.
There is an increased risk of injury. X Visit a qualified specialist workshop. 330
Display
messagesOn-board computer and displays