Seat beltsAdjusting the driver's and front-
passenger seat belt .........................4 5
Automatic comfort-fit feature .......... 44
Cleaning ......................................... 269
Correct usage .................................. 43
Fastening ......................................... 43
Important safety guidelines ............. 42
Introduction ..................................... 41
Releasing ......................................... 44
Switching belt adjustment on/off
(on-board computer) ...................... 201
Warning lamp ................................. 225
Warning lamp (function) ................... 45
Seats
Adjusting (electrically) ..................... 97
Adjusting the 4-way lumbar sup-
port ................................................ 100
Adjusting the head restraint ............ 98
Adjusting the multicontour seat ..... 100
Cleaning the cover ......................... 268
Correct driver's seat position ........... 96
Folding the backrests forward/
back ................................................. 99
Important safety notes .................... 96
Overview .......................................... 96
Seat backrest display message ..... 222
Seat heating .................................. 100
Seat heating problem .................... 102
Storing settings (memory func-
tion) ............................................... 108
Switching AIRSCARF on/off .......... 102
Switching seat heating on/off ....... 100
Switching seat ventilation on/
off .................................................. 101
Section
Trunk ............................................... 80
Securing cargo .................................. 242
Selector lever
Cleaning ......................................... 268
Sensors (cleaning instructions) ....... 267
Service menu (on-board com-
puter) .................................................. 198
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 315
Coolant (engine) ............................ 316 Engine oil ....................................... 315
Fuel ................................................ 313
Important safety notes .................. 312
Refrigerant (air-conditioning sys-
tem) ............................................... 317
Washer fluid ................................... 316
Setting the air distribution ............... 122
Setting the airflow ............................ 123
Setting the date
/time format
see also Digital Operator's Man-
ual .................................................. 234
Setting the language
see also Digital Operator's Man-
ual .................................................. 234
Setting the time
see also Digital Operator's Man-
ual .................................................. 234
Settings
Factory (on-board computer) ......... 201
On-board computer ....................... 198
Side impact air bag ............................. 47
Side marker lamp (display mes-
sage) ................................................... 211
Side windows
Cleaning ......................................... 266
Important safety information ........... 82
Opening/closing .............................. 83
Opening/closing (all) ....................... 83
Problem (malfunction) ..................... 85
Resetting ......................................... 84
Reversing feature ............................. 82
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 234
SmartKey
Changing the battery ....................... 76
Changing the programming ............. 74
Checking the battery ....................... 76
Display message ............................ 223
Door central locking/unlocking ....... 73
Important safety notes .................... 73
Loss ................................................. 77
Mechanical key ................................ 75
Opening/closing soft top ................. 87
Overview .......................................... 73
Positions (ignition lock) ................. 128
Problem (malfunction) ..................... 77
Starting the engine ........................ 130
16Index
Always make sure that the seat-belt extenderis retracted during a journey.
The seat-belt extender for the driver and front
passenger helps you fasten your seat belt. Seat-
belt extender =is extended when the respec-
tive door is closed and the SmartKey is turned to
position 1or 2in the ignition lock.
You can also extend seat-belt extender =with
seat-belt extender button ?.
XPress seat-belt extender button ?.
Seat-belt extender =extends.
Seat-belt extender =is retracted again if:
Rthe belt tongue is engaged in the seat belt
buckle.
Rthe belt tongue is not engaged in the seat belt
buckle within 60 seconds.
Rthe respective door is opened.
Rthe SmartKey is turned to position 0in the
ignition lock.
Ryou release the seat backrest and fold it for-
wards.
Rthe front-passenger seat is unoccupied after
approximately five seconds.
If you press seat-belt extender button ?after
this, seat-belt extender =will not extend.
Basic illustration
XAdjust the seat (Ypage 96).
The seat backrest must be in an almost ver-
tical position.
XPull the seat belt smoothly out of seat-belt
extender =and engage belt tongue ;into
belt buckle :.
The seat belt on the driver’s seat and the
front-passenger seat may be tightened auto-
matically, see "Belt adjustment"
(
Ypage 45).
XIf necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body.
In order to attach the child restraint system
securely in the vehicle, the seat belts in the rear
are equipped with a special seat belt retractor.
Further information can be found under "Special
seat belt retractor" (
Ypage 57).
Automatic comfort-install feature
The front seat belts have an automatic comfort-
install feature. The automatic comfort-fit feature
reduces the retraction force of the seat belts.
The seat belts are thus routed more comfortably
for the driver and front passenger.
Releasing seat belts
!Make sure that the seat belt is fully rolled up.
Otherwise, the seat belt or belt tongue will be
trapped in the door or in the seat mechanism.
This could damage the door, the door trim
panel and the seat belt. Damaged seat belts
44Occupant safety
Safety
can no longer fulfill their protective function
and must be replaced. Visit a qualified spe-
cialist workshop.
XPress the release button in the belt buckle,
hold the belt tongue firmly and guide the belt
back.
Seat belt adjustment
The seat-belt adjustment is an integral part of
the PRE-SAFE®convenience function. This func-
tion adjusts the driver's and front-passenger
seat belt to the upper body of the occupants.
The belt strap is tightened slightly when:
Rthe belt tongue is engaged in the buckle when
the seat-belt extender is retracted and
Rthe ignition is switched on
The seat-belt adjustment will apply a certain
retraction force if any slack is detected between
the vehicle occupant and the seat belt. Do not
hold on to the seat belt tightly while it is adjust- ing.
You can switch the seat-belt adjustment on and
off in the on-board computer (
Ypage 201).
Belt warning for the driver and front
passenger
The 7 seat belt warning lamp in the instru-
ment cluster is a reminder that all vehicle occu-
pants must wear their seat belts. It may light up
continuously or flash. In addition, there may be
a warning tone.
Regardless of whether the driver's seat belt has
already been fastened, the 7seat belt warn-
ing lamp lights up for six seconds each time the
engine is started. If, after six seconds, the driver
or front-passenger seat belt has not been fas-
tened and the doors are closed, the 7seat
belt warning lamp lights up. As soon as the driv- er's and front-passenger seat belts are fastened
or a front door is opened again, the 7seat
belt warning lamp goes out.
If the driver's seat belt is not fastened after the
engine is started, an additional warning tone will
sound. The warning tone switches off after six
seconds or once the driver's seat belt is fas-
tened.
If the vehicle's speed exceeds 15 mph
(25 km/h) once and the driver's and front-
passenger seat belts are not fastened, a warning tone sounds. A warning tone also sounds with increasing intensity for 60 seconds or until the
driver or front passenger have fastened their
seat belts.
If the driver or front passenger unfasten their
seat belts during the journey, the seat belt warn-
ing is activated again.
iMore information on the 7seat belt
warning lamp can be found under "Warning
and indicator lamps in the instrument cluster,
seat belt" (
Ypage 225).
Air bags
Introduction
The air bag installation point is identified by the
label AIR BAG.
An air bag supplements a correctly fastened
seat belt. However, it is not intended as a sub-
stitute for the seat belt. Air bags provide addi-
tional protection in the event of an accident.
Not all air bags are deployed in an accident. The
various air bag systems work independently of
each other (
Ypage 53).
There is, however, no system available today
that can completely rule out injury or death.
It is also not possible to rule out a risk of injury
caused by an air bag due to the high speed at
which the air bag must be deployed.
Important safety notes
GWARNING
If you do not sit in the correct seat position,
the air bag cannot protect as intended and
could even cause additional injury when
deployed. This poses an increased risk of
injury or even fatal injury.
To avoid hazardous situations, always make
sure that all of the vehicle's occupants:
Rhave fastened their seat belts correctly,
including pregnant women
Rare sitting correctly and maintain the great-
est possible distance to the air bags
Rfollow the following instructions
Always make sure that there are no objects
between the air bag and the vehicle's occu-
pants.
Occupant safety45
Safety
Z
Rif the vehicle skids, the front side windows are
closed.
Rthe air pressure in the side bolsters of the seat
backrests of the front multicontour seats is
raised.
If the hazardous situation passes without result-
ing in an accident, PRE-SAFE
®slackens the belt
pre-tensioning. On vehicles with multicontour
seats, the air pressure in the side bolsters is
reduced again. All settings made by PRE-SAFE
®
can then be reversed.
If the seat belt pre-tensioning is not reduced:
XMove the seat backrest or seat back slightly
when the vehicle is stationary.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE
®convenience function. Informa-
tion about the convenience function can be
found under "Belt adjustment" (
Ypage 45).
PRE-SAFE®PLUS (anticipatory occu-
pant protection system PLUS)
Introduction
PRE-SAFE®PLUS is only available in vehicles
with the Driving Assistance package.
Using the radar sensor system, PRE-SAFE
®
PLUS is able to detect that a head-on or rear-end
collision is imminent. In certain hazardous sit-
uations, PRE-SAFE
®PLUS takes pre-emptive
measures to protect the vehicle occupants.
Important safety notes
The intervention of PRE-SAFE®PLUS cannot
prevent an imminent collision.
The driver is not warned about the intervention
of PRE-SAFE
®PLUS.
PRE-SAFE®PLUS does not intervene if the vehi-
cle is backing up.
When driving, or when parking or exiting a park-
ing space with assistance from Active Parking
Assist, PRE-SAFE
®PLUS will not apply the
brakes.
Function
PRE-SAFE®PLUS intervenes in certain situa-
tions if the radar sensor system detects an
imminent head-on or rear-end collision.
PRE-SAFE
®PLUS takes the following measures
depending on the hazardous situation detected:
Rif the radar sensor system detects that a
head-on collision is imminent, the seat belts
are pre-tensioned.
Rif the radar sensor system detects that a rear-
end collision is imminent:
-the brake pressure is increased if the driver
applies the brakes when the vehicle is sta- tionary.
-the seat belts are pre-tensioned.
The PRE-SAFE®PLUS braking application is can-
celed:
Rif the accelerator pedal is depressed when a
gear is engaged
Rif the risk of a collision passes or is no longer
detected
Rif DISTRONIC PLUS indicates an intention to
pull away
If the hazardous situation passes without result-
ing in an accident, the original settings are
restored.
Automatic measures after an acci-
dent
Immediately after an accident, the following
measures are implemented, depending on the
type and severity of the impact:
Rthe hazard warning lamps are activated
Rthe emergency lighting is activated
Rthe vehicle doors are unlocked
Rthe front side windows are lowered
Rvehicles with a memory function: the electri-
cally adjustable steering wheel is raised
Rthe engine is switched off and the fuel supply
is cut off
Rvehicles with mbrace: automatic emergency
call
56Occupant safety
Safety
Correct driver's seat position
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
Observe the following when adjusting steering
wheel :, seat belt ;and driver's seat =:
Ryou are as far away from the driver's air bag as
possible.
Ryou are sitting in a normal upright position.
Ryour thighs are slightly supported by the seat
cushion.
Ryour legs are not entirely stretched and you
can depress the pedals properly.
Rthe back of your head is supported at eye level
by the center of the head restraint.
Ryou can hold the steering wheel with your
arms slightly bent.
Ryou can move your legs freely.
Ryou can see all the displays in the instrument
cluster clearly.
Ryou should have a good overview of traffic
conditions.
Rthe seat belt is pulled snugly against the bodyand is routed across the center of your shoul-
der and across your hips in the pelvic area.
Further related subjects:
RElectrical seat adjustment (Ypage 97)
RAdjusting the steering wheel (Ypage 103)
RFastening the seat belt correctly (Ypage 43).
RAdjusting the rear-view mirror and exterior
mirrors (Ypage 105).
RStoring the seat, steering wheel and exterior
mirror settings using the memory function
(
Ypage 108).
Seats
Important safety notes
GWARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The seats can still be adjusted when there is no
SmartKey in the ignition lock.
GWARNING
If the head restraints are not installed or not
adjusted correctly, they cannot provide pro-
tection as intended. There is an increased risk
of injury in the head and neck area, e.g. in the event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level.
Observe the safety notes on "Air bags"
(
Ypage 45) and "Children in the Vehicle"
(Ypage 57).
96Seats
Seats, steering wheel and mirrors
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
If you adjust the seat height carelessly, you or
other vehicle occupants could be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment buttons and become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem.
GWARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
!To avoid damage to the seats and the seat
heating, observe the following information:
Rkeep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
Rif the seat covers are damp or wet, do not
switch on the seat heating. The seat heat-
ing should also not be used to dry the seats.
Rclean the seat covers as recommended;
see "Interior care".
Rdo not transport heavy loads on the seats.
Do not place sharp objects on the seat
cushions, e.g. knives, nails or tools. The
seats should only be occupied by passen-
gers, if possible.
Rwhen the seat heating is in operation, do
not cover the seats with insulating materi- als, e.g. blankets, coats, bags, seat covers,
child seats or booster seats.
!Make sure that there are no objects in the
footwell under or behind the seats when mov-
ing the seats back. There is a risk that the
seats and/or the objects could be damaged.
iThe head restraints in the front seats are
installed with the NECK-PRO system
(
Ypage 55). For this reason, it is not possible
to remove the head restraints from the front
seats.
For more information, contact a qualified spe-
cialist workshop.
Adjusting the seats
:Head restraint height
;Seat cushion angle
=Seat height
?Seat fore-and-aft adjustment
ABackrest angle
iIf PRE-SAFE®is activated and the front-
passenger seat is in an unfavorable position,
it is moved to a better position.
iYou can store the seat settings using the
memory function (Ypage 108).
iVehicles with the through-loading feature: if
you fold down a rear seat backrest, the
respective front seat is moved forwards
slightly if necessary. This prevents the seats
from colliding.
Seats97
Seats, steering wheel and mirrors
Z
Adjusting the head restraints
Import ant safety notes
GWARNIN G
You could lose control of your vehicl eif you do
th efollowin gwhile driving:
Radjust th edriver's seat ,head restraint,
steering whee lor mirror s
Rfastenth eseat belt
There is aris kof an accident.
Adjus tth edriver's seat ,head restraint, steer -
ing whee land mirror and faste nyour seat belt
before starting th eengine.
GWARNIN G
If th ehead restraints are no tinstalled or no t
adjusted correctly, they canno tprovid epro -
tection as intended. There is an increased ris k
of injury in th ehead and neck area, e.g. in th e
event of an acciden tor when braking .
Always drive wit hth ehead restraints instal -
led. Befor edrivin goff ,mak esur efor every
vehicl eoccupant that th ecenter of th ehead
restrain tsupport sth ebac kof th ehead at
about eye level.
Do no trotate th ehead restraints of th efron tand
rear seats. Otherwise ,you canno tadjust th e
height and angle of th ehead restraints to th e
correc tposition .
Using th efore-and-af tadjustment, adjust th e
head restrain tso that it is as close as possibl eto
your head .
Observ eth eimportant safet ynote sregarding
th eseat s (
Ypage 96).
Adjusting the head restraint height
electri cally
XSlide switch for head restrain theight adjust -
men t: up or down in th edirection of th e
arrow.
Adjusting the rear head restraints
XTurn th eSmartKey to position 2in th eignition
loc k (Ypage 128).
XTo lower :press butto n:.
The head restraints mov eto th elowes tposi-
tion .
XTo extend :press butto n: again .
The head restraints only mov eint oth ecentral
position if AIRCAP is activated and no rear
seat belt has been fastened.
iPleas esee further information on AIRCAP
(Ypage 92).
Manually lowering the rear head
restraints
If th ehead restraints in th erear compartmen t
are in th eupper position ,th esof tto pcanno tbe
closed fully.
98Seats
Seats, steering wheel and mirrors
The electrically adjustable steering wheel can
still be adjusted when there is no SmartKey in
the ignition lock.
Adjusting the steering wheel
:To adjust the steering wheel height
;To adjust the steering wheel position (fore-
and-aft adjustment)
iFurther related subjects:
REASY-ENTRY/EXIT feature (Ypage 104)
RStoring settings (Ypage 108)
Steering wheel heating
Switching on/off
XTurn the SmartKey to position 2in the ignition
lock (Ypage 128).
XTo switch on/off: turn the lever in the direc-
tion of arrow :or;.
Indicator lamp =lights up or goes out.
Vehicles without KEYLESS-GO: when you
remove the SmartKey from the ignition lock, the
steering wheel heating is deactivated. Vehicles with KEYLESS-GO: when you switch off
the ignition and open the driver's door, the
steering wheel heating is deactivated.
iThe steering wheel heating may switch off
temporarily if:
Rthe temperature in the vehicle interior is
above 86 ‡ (30 †)
Rthe temperature of the steering wheel is
above 95 ‡ (35 †).
Indicator lamp =remains on.
Steering wheel103
Seats, steering wheel and mirrors
Z