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Problems with the SmartKey
Problem Possible causes/consequences and
M
MSolutions You can no longer lock
or unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (Y page 85) and replace it if
necessary (Y page 85).
If this does not work:
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the mechanical key. The SmartKey is faulty.
X
Lock (Y page 90) or unlock (Y page 90) the vehicle using
the mechanical key.
X Have 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.
X
Check the SmartKey battery (Y page 85) and replace it if
necessary (Y page 85).
If this does not work:
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the mechanical key. There is interference from a powerful source of radio waves.
X
Lock (Y page 90) or unlock (Y page 90) the vehicle using
the mechanical key. KEYLESS-GO is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of
the SmartKey.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the mechanical key.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop. You have lost a
SmartKey. X
Have the SmartKey deactivated at a qualified specialist
workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. SmartKey
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Problem Possible causes/consequences and
M
MSolutions You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the
SmartKey. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 360).
or
X Jump-start the vehicle (Y page 362).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. The vehicle is locked.
X
Unlock the vehicle and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle with the SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start 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.
G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
Ideally, place luggage or loads in the trunk/
cargo compartment. Observe the loading
guidelines (Y page 298). Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked. If the vehicle has
been locked with the SmartKey or with
KEYLESS-GO, opening a door from the inside 88
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will trigger the anti-theft alarm system.
Switch off the alarm (Y page 78).
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 66).X
To unlock a front door: pull door
handle ;.
Locking knob :pops up.
The door is unlocked and can be opened.
X To open a front door: pull door
handle ;.
X To unlock a rear door: pull up locking
knob :.
The door is unlocked and can be opened.
X To open a rear door: pull door handle;. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. X
To unlock: press button :.
X To lock: press button ;.
If all the doors are closed, the vehicle locks.
Meanwhile, the fuel filler flap will not be
locked or unlocked.
You cannot unlock the vehicle centrally from
the inside if the vehicle has been locked with
the SmartKey or KEYLESS-GO.
You can open a door from inside the vehicle
even if it has been locked.
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 66).
If the vehicle has been locked using the
locking button for the central locking, or has
been locked automatically, and a door is
opened from the inside:
R the vehicle will be fully unlocked if it had
previously been fully unlocked
R only the door which has been opened form
the inside is unlocked if only the driver's
door had been previously unlocked Automatic locking feature
X
To deactivate: press and hold button :
for about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds.
i If you press one of the two buttons and
do not hear a tone, the relevant setting has
already been selected. Doors
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The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning.
You could therefore lock yourself out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on a roller dynamometer.
You can also switch the automatic locking
function on and off using the on-board
computer (Y page 251). Unlocking the driver's door
(mechanical key)
If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
X Take the mechanical key out of the
SmartKey (Y page 84).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. 1
To unlock
X Turn the mechanical key counter-clockwise
to position 1.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the
SmartKey.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y page 78). Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key.
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the trunk lid/tailgate.
X Press the locking button (Y page 89).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs manually, if necessary ( Ypage 88).
X Close the driver's door.
X Take the mechanical key out of the
SmartKey (Y page 84).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. 1
To lock
X Turn the mechanical key clockwise as far
as it will go to position 1.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the trunk lid/
tailgate are locked.
X Insert the mechanical key into the
SmartKey. Trunk/cargo compartment
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust 90
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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. G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
! 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.
Ideally, place luggage or loads in the trunk/
cargo compartment. Observe the loading
guidelines (Y page 298).
Do not leave the SmartKey in the trunk/cargo
compartment. You could otherwise lock
yourself out.
Sedan without trunk lid remote closing
feature: the trunk lid can be:
R opened and closed manually from outside
R opened automatically from outside
R opened automatically from inside
R locked separately
R opened with the emergency release button
R unlocked with the mechanical key
Sedan with trunk lid remote closing
feature: the trunk lid can be:
R opened and closed manually from outside
R opened and closed automatically from
outside
R opened and closed automatically from
inside
R locked separately
R opened with the emergency release button
R unlocked with the mechanical key Wagon:
you can:
R open and close the tailgate manually from
outside
R open the tailgate manually from inside
(Wagon with a folding bench seat)
R open and close the tailgate automatically
from outside
R open and close the tailgate automatically
from inside
R limit the opening angle of the tailgate
R unlock the tailgate using the mechanical
key Trunk lid/tailgate reversing feature
The trunk lid/tailgate is equipped with an
automatic reversing feature. It reacts if a solid
object obstructs or restricts the trunk lid/
tailgate during the closing procedure. The
trunk lid/tailgate opens again automatically.
The automatic reversing feature is only an aid
and is not a substitute for your attentiveness
to the trunk lid/tailgate while it is closing. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small
fingers
R over the last 1/3 in (8 mm) of the closing
movement
This means that the reversing feature cannot
prevent someone being trapped in these
situations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
R press the Fbutton on the SmartKey, or
R press the remote operating switch on the
driver’s door, or
R press the closing or locking button on the
trunk lid/tailgate, or
R pull on the handle on the trunk lid/tailgate Trunk/cargo compartment
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Opening/closing from outside
Opening Handle (example: Sedan)
X
Press the %button on the SmartKey.
X Sedan: pull handle :.
X Raise the trunk lid.
Wagon: if you pull handle :and keep it in
this position, you can open the tailgate
manually. If you release the handle, the
tailgate opens automatically.
Closing Recess (example: Sedan)
X
Pull the trunk lid/tailgate down using
recess :.
X Wagon: let the tailgate drop and engage in
the lock.
X If necessary, lock the vehicle with
the & button on the SmartKey
(Y page 82) or with KEYLESS-GO
(Y page 83). i
If a KEYLESS-GO key is detected in the
trunk/cargo compartment, the trunk lid/
tailgate will not lock.
Sedan: the trunk lid then opens again. Opening/closing automatically from
outside
Important safety notes G
WARNING
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.
Opening You can open the trunk lid/tailgate
automatically with the SmartKey or the
handle in the trunk lid/tailgate.
X
Press and hold the Fbutton on the
SmartKey until the trunk lid/tailgate
opens.
or
X If the trunk lid/tailgate is unlocked, pull the
handle of the trunk lid/tailgate and release
it again immediately (Y page 92).92
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Closing
Closing button and locking button (example:
Sedan)
: Closing button
; Locking button
Sedan: on vehicles with the trunk lid remote
closing feature, you can close the trunk lid
automatically. On vehicles with the trunk lid
remote closing feature and KEYLESS-GO, you
can simultaneously close and lock the trunk
lid.
Wagon: on vehicles with KEYLESS-GO, you
can simultaneously close and lock the
tailgate.
X To close: press closing button :in the
trunk lid/tailgate.
X To close and lock simultaneously:
Press closing button ;in the trunk lid/
tailgate.
i If you leave a KEYLESS-GO key in the
trunk/cargo compartment, the trunk lid/
tailgate will not lock. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle's exhaust system may be very hot.
You could burn yourself by touching the
exhaust system if you use HANDS-FREE
ACCESS. There is a risk of injury. Always
ensure that you only make the kicking movement within the detection range of
sensors.
! If the SmartKey is within the rear
detection range of KEYLESS-GO, the
following situations, for example, could
lead to the unintentional opening of the
trunk lid/tailgate:
R using a car wash
R using a power washer
Make sure that the SmartKey is at least
6.5 ft (2 m) away from the vehicle.
General notes With KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the trunk lid/
tailgate or stop the procedure without using
your hands. This is useful if you have your
hands full. All you need to do is make a kicking
movement with your leg under the bumper.
Observe the following points:
R
Carry your KEYLESS-GO key about your
person. The KEYLESS-GO key must be in
the rear detection range of the vehicle.
R When making the kicking movement, make
sure that you are standing firmly on the
ground and that there is sufficient
clearance to the rear of the vehicle. You
could otherwise lose your balance e.g. on
ice. (Example: Sedan) Trunk/cargo compartment
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R
Always ensure that you only make the
kicking movement within the detection
range of sensors :.
R Stand at least 12 in (30 cm) away from the
rear area while doing so.
R Do not come into contact with the bumper
while making the kicking movement.
Otherwise, the sensors may not function
correctly.
R HANDS-FREE ACCESS does not function
when the engine is started.
R If a KEYLESS-GO key is within the rear
detection range of KEYLESS-GO, HAND-
FREE ACCESS could be triggered. For this
reason, the trunk lid/tailgate could open or
close unintentionally, e.g. if you:
- set something down or lift something up
behind the vehicle
- polish the rear of the vehicle.
Do not carry the KEYLESS-GO key about
your person in these situations or in
situations similar to these. You can thus
avoid unintentionally opening or closing the
trunk lid/tailgate.
R Using the HANDS-FREE ACCESS with a
prosthetic leg may restrict functionality. Operation (Example: Sedan)
X
To open/close: kick into sensor detection
range :under the bumper with your foot.
You will hear a warning tone while the trunk
lid/tailgate is opening or closing.
X If the trunk lid/tailgate does not open
after several attempts: wait at least ten
seconds, then move your foot under the
bumper again.
i If you hold your foot under the bumper for
too long, the trunk lid/ tailgate does not
open or close. Repeat the leg movement
faster if this occurs.
To stop the opening or closing procedure:
R move your foot in sensor detection
range :under the bumper
R pull the outside of the handle on the trunk
lid/tailgate
R press the closing button in the trunk lid/
tailgate, or
R press the Fbutton on the SmartKey 94
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