
seat belt and guide the belt tongue to the belt
sash guide.
For more information aboutr eleasing the seat
belt with release button ?,see "Releasing
seat belts" (Y page 49).
Seat belt adjustment The seat-belt adjustment function adjusts the
driver's and front-passenger seat belt to the
upper body of the occupants.
The belt strap is tightened slightly when:
R you engage the belt tongue in the belt
buckle and you then turn the key to position
2 in the ignition lock.
R the key is in position 2in the ignition lock
and you then engage the belt tongue in the
buckle oncet he seat-belt extender has
retracted.
The seat-belt adjustment will apply acertain
tightening forc eifany slack is detected
between the occupan tand the sea tbelt. Do
not hold on to the seat belt tightly while it is
adjusting. You can switch the seat-belt
adjustment on and off in the on-board com-
puter (Y page 230).
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function .More
information about PRE-SAFE ®
can be found
in the "PRE-SAFE ®
(preventativ eoccupant
protection)" section (Y page 45).
Releasing seat belts X
Press release button ?(Ypage 47) and
guide belt tongue ;back towards seat
belt extender :.
! 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. Dam-
aged seat belts can no longer fulfil their
protective function and must be replaced.
Consult aMercedes-BenzS ervice Centre. Belt warning for driver and front
passenger The
7 seat belt warning lamp in the instru-
ment cluster is areminder for all occupants
to fasten their seat belts. It may light up con-
tinuously or flash. In addition, ther emay be a
warning tone.
The 7 seat belt warning lamp goes out and
the warning tonec eases when the driver and
the fron tpassenger have fastened their seat
belt.
For certain countries only: regardless of
whether th edriver or th efront passenger
have fastened their seat belts, the 7seat
beltw arning lamp light supfor six seconds
after th eengineiss tarted. It then goes out if
th ed river and th efront pa ssenger have fas-
tene dtheir seat belts.
i For mor einformatio nonthe7 seat
belt warning lamp, see "Warning and indi-
cator lamps in th einstrumen tcluster, seat
belt" (Y page 255).
Rea rseat belt statu sindicator The rear-compartmen
tseat belt status indi-
cator tells you if the rear passengers have
their seat belts fastened.
The rear-compartment seat belt status indi-
cator indicates the rear seat on which the belt
is fastened.
The rear-compartment seat belt status indi-
cator appears in the multifunction display for
around 30 seconds if:
R you drive off and reach aspeed of approx-
imately 10 km/h.
R the rear passengers fasten or unfasten
their seat belts while the vehicle is in
motion.
R someon egets in or out of the vehicle and
the vehicle drives off again. Occupant safety
49Safety Z

tem could heat up and the child could burn
herself/himself on them.
If ac hild opens adoor, the child or othe rper-
sons could be injured as aresult. They could
get out and injure themselves or be injured by
ap assing vehicle.
Also observe the notes on HOLD .Relevant
information can be found in the index. G
WARNING
Unsecured or incorrectly positioned loads
increase the risk of injury for children and all
other occupant sinthe event of:
R an accident
R ab raking manoeuvre
R as udden change of direction
Do not carry heavy or hard objects in the vehi-
cle interior unless they are secured. You will
find further information under "Loading guide-
lines" in the index.
Child seat lock The seat belts on the rear seats are fitted with
ac
hild seat lock. When enabled, the child-
seat lock function ensures that the belt does
not slacken oncet he child seat is secured.
Installing achild restraint system:
X Always comply with the manufacturer's
installation instructions.
X Pull the seat belt smoothly from the inertia
reel.
X Engage the seat belt tongue in the belt
buckle.
Activating the child seat lock:
X Pull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear aratchetin gsound. The child-seat lock
function is enabled.
X Push down on the child restraint system to
take up any slack. Removing
achild restraint system/deactivat-
ing the child seat lock:
X Always comply with the manufacturer's
installation instructions.
X Press the seat belt release button and
guide the belt tongue to the belt outlet.
The child-seat lock function is deactivated.
Child seat on the front-passenger seat Warning notice on the front-passenger sun visor
Warning symbol for
arearward-facing child
restraint system G
WARNING
If the front-passenger airbag is not disabled:
R ac hild secured in achild restraint system
on the front-passenger seat could be seri-
ously and even fatally injured by the front-
passenger airbag deploying. This is espe-
cially arisk if the child is in the immediate
vicinit yofthe front-passenger airbag when
it deploys.
R never secure achild on the front-passenger
seat in arearward-facing child restraint sys- 52
Children in thev
ehicleSafety

tem. Onl
ysecurear earward-facing child
restraint syste monasuitablerear seat.
R always move the front-passenger seat to
the rearmost position if you secure achild
in af orward-facing child restraint system
on the front-passenger seat.
The front-passenger airbag is not disabled:
R on vehicles without automatic child seat
recognition on the front-passenger seat
R in vehicles with automatic child seat rec-
ognition in the front-passenger seat, if no
special child restraint system with trans-
ponders for automatic child seat recogni-
tion in the front-passenger seat has been
fitted
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat, if the
PASSENGER AIRBAG OFF indicator lamp
4 is not lit.
To make you aware of this danger, acorre-
sponding warning sticker has been affixed on
the dashboard and on both sides of the sun
visor on the front-passenger side.
Information about recommended child
restraint systems is available at any
Mercedes-Benz Service Centre.
Automatic child seat recognition on the
front-passengers eatIf your vehicle does no
thave automatic child
seat recognition 2
on th efront-pa ssenger seat
,thisisi ndicated by aspecial sticker. The
sticker is affixe dtotheside of th edashboard
on th efront-pa ssenger side. The sticker is
visible when you open th efront-pa ssenger
door. The front-passenger seat sensor system for
child restraint systems detect swhether a
special Mercedes-Ben zchild seat with a
transponder for automatic child seat recog-
nition has been fitted. In such cases,
PASSENGER AIRBAG OFF indicator lamp
4: lights up. The front-passenger airbag
is disabled. G
WARNING
If the 4 PASSENGER AIRBAG OFF indica-
tor lamp does not light up when the child
restraint system is fitted, the front-passenger
airbag has not been disabled. If the front-
passenger airbag deploys, the child could be
seriously or even fatally injured.
Proceed as follows:
R do not use arearward-facing child restraint
system on the front-passenger seat.
R fit arearward-facing child restraint system
on asuitable rear seat.
or
R only use aforward-facing child restraint
system on the front-passenger seat and
2 Vehicles without automatic child seat recognition on the front-passenger seat: if you turn the key to position
2int he ignition lock, the 4PASSENGER AIRBAG OFF indicator lamp lights up briefly but has no function.
It does not indicate that there is automatic child seat recognition on the front-passenger seat. Children in the vehicle
53Safety
Z

Child-proof locks
Important safety notes G
WARNING
Do no tleave children unsupervised in the
vehicle, even if they are secured in achild
restraint system. They could injure them-
selves on parts of the vehicle. They could also
be seriously or even fatally injured by pro-
longed exposure to extreme heat or cold.
Do not expose the child restraint system to
direct sunlight. Parts of the child restraint sys-
tem could heat up and the child could burn
herself/himself on them.
If ac hild opens adoor, the child or other per-
sons could be injured as aresult. They could
get out and injure themselves or be injured by
ap assing vehicle.
Also observe the notes on HOLD .Relevant
information can be found in the index.
Override feature for the rear side win-
dows G
WARNING
Activate the override switch for the rear side
windows if children are travellin ginthe vehi-
cle. Otherwise, the children could open the
side windows while the vehicle is movin gand
injure themselves or others. X
To activate/deactivate: press button;.
If indicator lamp :is lit, operation of the
rear side windows is disabled. Operation is
only possible using the switches in the driv- er's door. If indicator lamp
:is off, oper-
ation is possible using the switches in the
rear compartment. Driving safety systems
Driving safety system
soverview
In this section, you will find information about
the following driving safety systems:
R ABS (Anti-lock BrakingSystem)
R BAS (Brake AssistSystem)
R BAS PLUS ( BrakeAssist System Plus*)
R Adaptive brake lamps
R ESP ®
(Electronic StabilityProgram)
R EBD( electronic brake force distribution)
R ADAPTIV EBRAKE
R PRE-SAFE ®
Brake Important safety notes
G
WARNING
The risk of an acciden tissignificantly
increased by driving too fast. This is particu-
larly the case when cornering as well as on
wet or slippery roads or when driving too close
to the vehicle in front.
The driving safety systems described in this
section can neither reduce this risk nor over-
ride the laws of physics.
For this reason, always adapty our driving
style to the prevailing road and weather con-
ditions. Maintain sufficient distance from
other road users and object sonthe road.
i Please notet hat the driving safety sys-
tems described only work as effectively as
possible when there is adequate contact
between the tyres and the road surface.
Pay particular attention to the information
regarding tyres, recommended minimum
tyre tread depths etc. in the "Wheels and
tyres" section (Y page 318). Driving safety systems
61Safety Z

Anti-thef
tsystems Immobiliser
The immobiliser prevents your vehicl efrom
bein gstarted without th ecorrect key.
X To activat ewith the key: remove the key
from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X To deactivate: switch on the ignition.
i The immobiliser is alway sdeactivated
when you start the engine. ATA (Anti-Theft Alarm system)
Av isual and audible alarm is triggere difthe
alarm system is prime dand you open:
R ad oor
R the vehicle with the emergency key ele-
ment
R the boot lid
R the bonnet
The alarm is not switched off ,even if you
clos ethe open door that has triggere dit, for
example. X
To prime: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp :flashes .The alarm sys-
tem is primed after approximately 15 sec-
onds.
X To deactivate: unlock the vehicle with the
key or KEYLESS-GO. X
To stop the alarm using the key: insert
the key into the ignition lock.
The alarm is switched off.
or
X Press the %or& button on the key.
The alarm is switched off.
X To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The key
must be outside the vehicle.
The alarm is switched off.
or
X Press the Start/Stop button on the dash-
board. The key must be inside the vehicle.
The alarm is switched off. Tow-away protection
An audible and visual alarm is triggered if your
vehicle's angle of inclination is altered while
tow-away protection is primed. This occurs if
the vehicle is jacked up on one side, for exam-
ple.
X To prime: lock the vehicle with the key or
KEYLESS-GO.
Tow-away protection is primed after
approximately 30 seconds.
X To deactivate: unlock the vehicle with the
key or KEYLESS-GO.
Tow-away protection is deactivated auto-
matically.
To prevent afalse alarm, deactivate tow-away
protection manually if your vehicle:
R is being transported
R is being loaded onto aferry or car trans-
porter, for example
R is parked on amovable surface, e.g. in a
split-level garage
Deactivating:
X Remove the key from the ignition lock. 68
Anti-theft systemsSafety

X
Press button :.
Indicator lamp ;lights up briefly.
X Lock the vehicle with the key or KEYLESS-
GO.
Tow-away protection is deactivated.
Tow-away protection remains deactivated
until:
R the vehicle is unlocked again.
R ad oor is opened and closed again.
R the vehicle is locked again. Interior motion sensor
If the interior motion sensor is primed, avis-
ual and audibl ealarm is triggered if move-
ment is detected in the vehicle interior while
the vehicle is locked. This occurs if someone
reaches into the vehicle interior, for example.
To activate:
X Make sure that:
R
the side windows are closed.
R the panorama sliding sunroof is closed
(Coupé).
This will prevent false alarms.
X Cabriolet: make sure that the roof is
closed.
X Lock the vehicle with the key or KEYLESS-
GO.
The interior motion sensor is primed after
approximately 30 seconds.
i Cabriolet: in some countries, the interior
motion sensor is primed even if the soft top
is open. The vehicle should only be parked with the soft top closed, however, to pre-
vent insect
sorfalling leaves, for example,
from causing false alarms.
To switch off:
X Unlock the vehicle with the key or KEY-
LESS-GO.
The interior motion sensor is deactivated
automatically.
To prevent afalse alarm, deactivat ethe inte-
rior motion sensor if you lock your vehicle
and:
R people or animals remain in the vehicle.
R the side windows remain open.
R the panorama sliding sunroof remains open
(Coupé).
Deactivating:
X Remove the key from the ignition lock. X
Press button :.
Indicator lamp ;flashes briefly.
X Lock the vehicle with the key or KEYLESS-
GO.
The interior motion sensor is deactivated.
The interior motion sensor remains deactiva-
ted until:
R the vehicle is unlocked again.
R ad oor is opened and closed again.
R the vehicle is locked again.
i UK only: Your vehicle is equipped with a
double lock function. The doors cannot be
opened from the inside if the vehicle has
been locked with the key (Y page 77).
Deactivate the interior motion sensor Anti-theft systems
69Safety Z

before locking the vehicle with the key. The
doors can then be opened from the inside
after the vehicle has been locked from the
outside with the key. Observ
ethe "Impor-
tant safety notes" (Y page 77).70
Anti-theft systemsSafety

Useful information
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviation sare possible. Please
not ethat your vehicle may not be equipped
with all feature sdescribed. This also
applies to safety-relevan tsystems and
functions.
i Pleas ereadt he information on qualified
specialist workshop s(Ypage 22). Key
Key functions
Locking an dunlocking centrally The key centrally locks/unlocks:
R
the doors
R the boot lid
R the fuel filler flap G
WARNING
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then not
possible to open the doors from inside the
vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children ,elderly peo-
ple or people in need of special assistanc eif
the vehicle has been locked with the key. As
ar esult, they may not be able to free them-
selves in the event of an emergency. As a
result, they could be seriously or even fatally
injured by prolonged exposure to extremely
high or low temperatures, for example. In this
case, rescuin gpeople from outside the vehi-
cle is difficult.
Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors
can then be opened from the inside after the vehicle has been locked from the outside with
the key.
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open adoor from inside the vehicle at any
time, even if it has been locked
R start the vehicle using akey which has been
left in the vehicle
R release the parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for ashort time. G
WARNING
If ak ey ring is too heavy or too large, the
weight actin gonthe key could cause it to turn
in the ignition lock or catc honthe steering
wheel. This could cause the engine to be
switched off suddenly. You may lose control
of the vehicle and cause an accident. Do not
attac hany heavy or large key rings to the key
that is inserted in the ignition. :
& To lock the vehicle
; F To unlock the boot lid
= % To unlock the vehicle
When unlocking, the turn signals flash once.
When locking, they flash three times.
You can also set an audible signal to confirm
that the vehicle has been locked or unlocked.
The audible signal can be activated and deac- 72
KeyOpening and closing