
Recognition by thecamera system is also
impaire din th eevent of:
Rdir ton th ecamera or if th ecamera is cov-
ere d
Rthere is glar eon th ecamera system, e.g.
from th esun bein glow in th esk y
Rdarkness
Rif:
-pedestrian smov equickly, e.g. into th e
pat hof th evehicl e
-thecamera system no longer recognizes
a pedestrian as aperson due to special
clothin gor other objects
-apedestrian is concealed by other
objects
-th etypical outlin eof aperson is no tdis-
tinguishable from th ebackgroun d
Followin gdamag eto th efron ten dof th evehi-
cle ,hav eth econfiguration and operation of
th eradar sensor schecke dat aqualified spe -
cialist workshop .This also applie sto colli-
sion sat low speeds wher ethere is no visible
damag eto th efron tof th evehicle.
Followin gdamag eto th ewindshield, hav eth e
configuration and operation of th ecamera
system checke dat aqualified specialist work-
shop.
Function
XTo activate/deactivate: activateor deac -
tivat ePRE-SAF E®Brake in th eon-boar d
computer (
Ypage 190).
If th ePRE-SAF E®Brake is no tactivated, th e
æ symbol appear sin th emultifunction
display.
Startin gat aspeed of around 4mph (7 km/h),
this function warn syou if you rapidly
approac h avehicl ein front. An intermittent
warnin gtone will then soun dand th e·
distanc ewarnin glamp will ligh tup in th e
instrumen tcluster.
XBrake immediately to defuse th esituation .
or
XTak eevasive action provided it is saf eto do
so.
If there is an increase dris kof collision ,pre -
ventive passenger protection measures (PRE -
SAFE
®) are activated.
If th eris kof collision wit hth evehicl ein fron t
remain sand you do no tbrake, tak eevasive
action or accelerate significantly, th evehicl e
may perfor mautomatic emergenc ybraking,
up to th epoin tof full brak eapplication .Auto-
matic emergenc ybrakin gis no tperformed
until immediately prior to an imminen tacci-
dent.
You can preven tth eintervention of th ePRE -
SAFE
®Brake at any time by:
Rdepressin gth eaccelerato rpedal further.
Ractivatin gkickdown .
Rreleasingth ebrak epedal .
The b
rakin gaction of PRE-SAF E®Brake is
ended automatically if:
Ryou maneuve rto avoid th eobstacle.
Rthere is no longer aris kof collision .
Rthere is no longer an obstacle detecte din
fron tof your vehicle.
STEER CONTROL
Genera linformation
STEE RCONTROL help syou by transmitting a
noticeable steerin gforce to th esteerin g
whee lin th edirection require dfor vehicl e
stabilization .
This steerin gassistanc eis provided in partic-
ular if:
Rbot hright wheels or bot hlef twheels are on
a slipper yroa dsurfac ewhen you brak e
heavily.
Rth evehicl estart sto skid.
86Driving safety systems
Safety

signal can be activated and deactivated using
the on-board computer (
Ypage 190).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (
Ypage 190).
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a KEY-
LESS-GO key in the vehicle.
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry
the SmartKey with you. You can combine the functions of KEYLESS-GO with those of a con-
ventional SmartKey. Unlock the vehicle by
using KEYLESS-GO, for instance, and lock it
using the &button on the SmartKey.
When locking or unlocking with KEYLESS-GO,
the distance between the SmartKey and the
corresponding door handle must not be
greater than 3 ft (1 m).
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example:
Rwhen the external door handles are
touched
Rwhen starting the engine
Rwhile the vehicle is in motion
XTo unlock the vehicle: touch the inner
surface of the door handle.
XTo lock the vehicle: touch sensor sur-
face :.
XConvenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
For further information on the convenience
closing feature, see the Digital Operator's
Manual, keyword "Convenience closing".
(Example: Sedan)
XTo unlock the trunk lid/tailgate: pull the
handle on the trunk lid/tailgate.
The vehicle only unlocks the trunk lid/tail-
gate.
Deactivating and activating
If you do not intend to use a key for an exten-
ded period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power,
thereby conserving battery power. For the
purposes of activation/deactivation, the
vehicle must not be nearby.
XTo deactivate: press the&button on
the SmartKey twice in rapid succession.
The battery check lamp of the SmartKey
(
Ypage 93) flashes twice briefly and
SmartKey91
Opening and closing
Z

SmartKey battery
Checking the battery
XPress the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
XChange the battery (Ypage 93).
iIf the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
Rlocks or
Runlocks the vehicle
iYou can get a battery at any qualified spe-
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the Smart-
Key (
Ypage 92).
XPress mechanical key ;into the opening
in the SmartKey in the direction of the
arrow until battery compartment cover :
opens. Do not hold battery compartment
cover :closed while doing so.
XRemove battery compartment cover :.
XRepeatedly tap the SmartKey against your
palm until battery=falls out.
XInsert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
XMake sure that the surface of the battery is
free of lint, grease and other contaminants.
XInsert the front tabs of battery compart-
ment cover :into the housing and then
press to close it.
XInsert mechanical key ;into the Smart-
Key.
XCheck the function of all SmartKey buttons
on the vehicle.
SmartKey93
Opening and closing
Z

Problems with the SmartKey
ProblemPossible causes/consequences andMSolutions
You can no longer lock
or unlock the vehicle
using the SmartKey.The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 93) and replace it if nec-
essary (
Ypage 93).
If this does not work:
XUnlock (Ypage 96) or lock (Ypage 96) the vehicle using the
mechanical key.
The SmartKey is faulty.
XUnlock (Ypage 96) or lock (Ypage 96) the vehicle using the
mechanical key.
XHave the SmartKey checked at a qualified specialist workshop.
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 93) and replace it if nec-
essary (
Ypage 93).
If this does not work:
XUnlock (Ypage 96) or lock (Ypage 96) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 96) or lock (Ypage 96) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of
the SmartKey.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
XUnlock (Ypage 96) or lock (Ypage 96) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
You have lost a Smart-
Key.XHave the SmartKey deactivated at a qualified specialist work-
shop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
94SmartKey
Opening and closing

ProblemPossible causes/consequences andMSolutions
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
The engine cannot be
started using the
SmartKey.the on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(
Ypage 278).
or
XJump-start the vehicle (Ypage 279).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
Ideally, place luggage or loads in the trunk/
cargo compartment. Observe the loading
guidelines (
Ypage 238).
Information in the Digital Operator's
Manual
In the Digital Operator's Manual you will find
information on the following topics:
RUnlocking and opening doors from the
inside
RCentrally locking and unlocking the vehicle
from the inside
RAutomatic locking feature
Doors95
Opening and closing
Z

Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
XTake the mechanical key out of the Smart-
Key (
Ypage 92).
XInsert the mechanical key into the lock of
the driver's door as far as it will go.
XTurn the mechanical key counter-clockwise
to position1.
The door is unlocked.
XTurn the mechanical key back and remove
it.
XInsert the mechanical key into the Smart-
Key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (
Ypage 87).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key.
XOpen the driver's door.
XClose the front-passenger door, the rear
doors and the trunk lid/tailgate.
XPress the locking button (Ypage 95).
XCheck whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs by hand, if necessary.
XClose the driver's door.
XTake the mechanical key out of the Smart-
Key (
Ypage 92).
XInsert the mechanical key into the lock of
the driver's door as far as it will go.
XTurn the mechanical key clockwise to posi-
tion 1.
The door is unlocked.
XTurn the mechanical key back and remove
it.
XMake sure that the doors and the trunk lid/
tailgate are locked.
XInsert the mechanical key into the Smart-
Key.
Trunk/cargo compartment
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid/tailgate is open when the engine is
running, especially if the vehicle is in motion.
There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid/tailgate. Never drive with the
trunk lid/tailgate open.
!The trunk lid/tailgate swings upwards
and to the rear when opened. Therefore,
make sure that there is sufficient clearance
above and behind the trunk lid/tailgate.
96Trunk/cargo compartment
Opening and closing

Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops (
Ypage 31).
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.
XObserve the safety guidelines on seat
adjustment (
Ypage 115).
XMake sure that seat =is adjusted prop-
erly.
Electrical seat adjustment (
Ypage 116)
When adjusting the seat, make sure that:
Ryou are as far away from the driver's air bag
as possible
Ryou are sitting in a normal upright position
Ryou can fasten the seat belt properly
Ryou have moved the backrest to an almost
vertical position
Ryou have set the seat cushion angle so that
your thighs are gently supported
Ryou can depress the pedals properly
XCheck whether the head restraint is adjus-
ted properly.
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by the
center of the head restraint.
XObserve the safety guidelines on steering
wheel adjustment (
Ypage 117).
XMake sure that steering wheel :is adjus-
ted properly.
114Correct driver's seat position
Seats, steering wheel and mirrors

Adjusting the steering wheel electrically
(
Ypage 117)
When adjusting the steering wheel, make
sure that:
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 instru-
ment cluster clearly
XObserve the safety guidelines for seat belts
(
Ypage 50).
XCheck whether you have fastened seat
belt ;properly (
Ypage 52).
The seat belt should:
Rfit snugly across your body
Rbe routed across the middle of your shoul-
der
Rbe routed in your pelvic area across the hip
joints
XBefore starting off, adjust the rear-view mir-
ror and the exterior mirrors in such a way
that you have a good view of road and traf-
fic conditions (
Ypage 117).
XVehicles with a memory function: save
the seat, steering wheel and exterior mirror
settings with the memory function
(
Ypage 117).
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 54) and "Children in the Vehicle"
(
Ypage 68).
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.
Seats115
Seats, steering wheel and mirrors
Z