Problems with the SmartKey
Problem Possible causes/consequences and
0050
0050Solutions You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X
Point the tip of the SmartKey at the driver's door handle from
close range and try to unlock or lock the vehicle again.
If this does not work:
X Unlock the vehicle using the mechanical key (Y page 63).
X Check the SmartKey battery and replace it if necessary
(Y page 64). The SmartKey is faulty.
X
Lock or unlock the vehicle using the mechanical key
(Y page 63).
X Have the SmartKey checked at a qualified specialist workshop. You have lost a
SmartKey. X
Have the SmartKey canceled at an authorized Mercedes-Benz
Center.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 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 KEYLESS-
GO. The SmartKey is in
the vehicle. A door is open. Therefore, the SmartKey cannot be detected as
easily.
X
Close the door 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. SmartKey
65Opening and closing Z
Problem Possible causes/consequences and
0050
0050Solutions The engine cannot be
started using the
SmartKey. The on-board voltage is too low.
X
Switch off non-essential consumers, such as seat heating or
interior lighting, and try to start the engine again.
X Remove the SmartKey and reinsert it into the ignition lock.
X Start the engine within 30 seconds of inserting the SmartKey
into the ignition lock.
X Repeat if necessary.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 236).
or
X Jump-start the vehicle (Y page 240).
or
X Consult a qualified specialist workshop. The SmartKey cannot
be turned in the ignition
lock. The SmartKey has been in position
0for a considerable time.
X Remove the SmartKey and reinsert it into the ignition lock.
X Check the starter battery and charge it if necessary
(Y page 236).
X Start the engine. The on-board voltage is too low.
X
Switch off nonessential consumers, such as seat heating or
interior lighting, and try to turn the SmartKey again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 236).
or
X Jump-start the vehicle (Y page 240).
or
X Consult a qualified specialist workshop. 66
SmartKeyOpening and closing
Unlocking and opening doors from
the inside
Coupe You can only open a door from the inside if it
is unlocked.
The vehicle locks the doors automatically,
when you drive faster than 9 mph
(15 km/h).
The doors are automatically unlocked after a
journey if you switch off the engine.
! The doors swing upwards and out when
opened. Therefore, make sure that there is
sufficient clearance above the vehicle. X
To unlock the door manually: press
the 0036 button of central locking 0087.
or
X Pull locking knob 0043upwards.
X To open the door: pull handle0044.
X Swing the door upwards as far as it will go.
X To close the door: pull the door down by
handle 0085.
X Allow the door to engage in the lower
position.
X To lock the door manually: press
the 0037 button of central locking 0087.
or
X Push locking knob 0043downwards.
Roadster You can open a door from inside the vehicle
even if it has been locked. Only open the door when the traffic situation
permits.
X
Pull door handle 0044.
If the door is locked, locking knob 0043pops
up. The door is unlocked and can be
opened.
i When a door is opened, the side window
on that side opens slightly. When the door
is closed, the triangular window closes
again.
! The side windows will not open/close if
the battery is discharged or if the side
windows have iced up. It will then not be
possible to close the door. Do not attempt
to force the door closed. You could
otherwise damage the door or the side
window. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away.
Coupe: the central locking/unlocking button
does not lock or unlock the fuel filler flap.
Roadster: the central locking/unlocking
button does not lock or unlock the fuel filler
flap or the stowage compartments, such as
the glove box. 68
DoorsOpening and closing
X
Insert the mechanical key fully into trunk
lid lock 0043in the rear compartment of the
center console.
X Turn the mechanical key clockwise as far
as possible.
X Remove the mechanical key.
X Check that the trunk remains locked when
you press on the trunk lid remote control
button. Unlocking the trunk (mechanical key)
If the trunk can no longer be unlocked with
the SmartKey:
X Take the mechanical key out of the
SmartKey (Y page 63). X
Insert the mechanical key fully into trunk
lid lock 0043in the center console in the
vehicle interior.
X Turn the mechanical key counter-clockwise
as far as possible.
The trunk lid opens slightly. Trunk emergency release
You can open the trunk lid from inside the
vehicle with the emergency release button. X
Briefly press emergency release
button 0043.
The trunk lid unlocks and opens slightly.
X Push the trunk lid upwards to open it
completely.
The trunk lid can be unlocked with the trunk
lid emergency release when the vehicle is
stationary or while driving.
Trunk lid emergency release light:
R emergency release button 0043flashes for
30 minutes after the trunk lid is opened.
R emergency release button 0043flashes for
60 minutes after the trunk lid is closed.
The trunk lid emergency release does not
unlock the trunk lid if the battery is
disconnected or discharged.
If the vehicle was locked centrally, opening
the trunk lid with the trunk lid emergency
release triggers the anti-theft alarm system. Side windows
Important safety notes
G
WARNING
When opening and closing the side windows,
make sure that nobody can be injured by the
opening or closing procedure.
The side windows are equipped with
automatic operation and anti-entrapment Side windows
73Opening and closing
Z
R
clean the seat covers as recommended;
see the "Interior care" section.
R do 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
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
! When you move the seats, make sure that
there are no objects in the footwell or
behind the seats. Otherwise, you could
damage the seats and the objects. Seat adjustment
0043
Backrest angle
0044 Seat fore-and-aft adjustment
0087 Seat cushion angle
0085 Seat height
i You can store the seat settings using the
memory function (Y page 89).Adjusting the lumbar support
You can adjust the contour of the seat so as
to provide optimum support for your back. 0043
To adjust the upper back support
0044 To adjust the contour of the backrest in
the lumbar region
0087 To adjust the lateral structure and support
of the seat
X Select key position 2with the Start/Stop
button.
i If, after a certain amount of time, the seat
no longer has the desired contour, repeat
the adjustment. Switching the seat heating on/off
Switching on/off G
WARNING
Repeatedly setting the seat heating to level
3 may result in excessive seat temperatures.
The health of passengers that have limited
temperature sensitivity or a limited ability to
react to excessively high temperatures may
be affected or they may even suffer burn-like
injuries. Therefore, do not use seat heating
level 3repeatedly.
The three red indicator lamps in the button
indicate the heating level you have selected.
i If the battery voltage is too low, the seat
heating may switch off. 84
SeatsSeats, steering wheel and mirrors
The system automatically switches down
from level 3to level 2after approximately five
minutes.
The system automatically switches down
from level 2to level 1after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1.
X Select key position 2with the Start/Stop
button.
X To switch on: press button0043repeatedly
until the desired heating level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
Problems with the seat heating The seat heating has switched off
prematurely or cannot be switched on. The
vehicle's electrical system voltage is too low
because too many electrical consumers are
switched on.
X Switch off electrical consumers that you do
not need, such as the rear window
defroster or interior lighting.
Once the battery is sufficiently charged, the
seat heating will switch back on
automatically. AIRSCARF (Roadster)
G
WARNING
Very hot air can flow out of the AIRSCARF
vents in the head restraints when AIRSCARF
is in operation. This can cause burns on
unprotected skin near the AIRSCARF vents.
Make sure that you reduce the heater output
in time.
The AIRSCARF function warms the head and
neck area of vehicle occupants with warm air.
The warm air flows out of the holes in the head
restraints.
The three red indicator lamps in the button
indicate the heating level you have selected. X
Make sure that the SmartKey is in
position 2in the ignition lock.
X To activate: press button 0043.
Three red indicator lamps in the button light
up. The blower starts up after a preheating
phase of seven seconds.
X Press button 0043repeatedly until the
desired heating level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
You can use the adjustable fins on the head
restraint to adjust the height of the current of
air blown out according to your height.
Make sure that there are no objects covering
the intake grille on the back of the driver's
seat backrest.
i The blower continues running for seven
seconds to cool down the heating
elements. Seats
85Seats, steering wheel and mirrors Z
i
If the battery voltage is too low, AIRSCARF
may switch off. Steering wheel
Important safety notes
G
WARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child's unsupervised access to a
vehicle could result in an accident and/or
serious personal injury. Adjusting the steering wheel
0043
To adjust the steering wheel position
(fore-and-aft adjustment)
0044 To adjust the steering wheel height
i Other topics:
R EASY-ENTRY/EXIT feature
(Y page 86)
R Storing settings (Y page 89) EASY-ENTRY/EXIT feature
Important safety notes The EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board
computer (Y
page 156). G
WARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering wheel adjustment stalk or press the
memory position switch.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury. G
WARNING
Let the system complete the adjustment
procedure before setting the vehicle in
motion. All steering wheel adjustment must
be completed before setting the vehicle in
motion. Driving off with the steering wheel
still adjusting could cause the driver to lose
control of the vehicle.
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings upwards when
you:
R
remove the SmartKey from the ignition lock
R open the driver's door with the KEYLESS-
GO start function in position 1
R open the driver's door and the SmartKey is
in position 0or 1in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop. 86
Steering wheelSeats, steering wheel and mirrors
the exterior mirror to the desired position.
You should have a good overview of traffic
conditions.
Folding the exterior mirrors in or out
electrically X
Select SmartKey position 1or 2with the
Start/Stop button.
X Briefly press button 0085.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while the vehicle is
in motion, as they may otherwise vibrate.
i If you are driving faster than
30 mph (47 km/h ), youcan no longer fold
in the exterior mirrors.
Setting the exterior mirrors If the battery has been disconnected or
completely discharged, the exterior mirrors
must be reset. The exterior mirrors will
otherwise not fold in when you select the
"Fold in mirrors when locking" function in the
on-board computer (Y page 156).
X Select SmartKey position 1using the
Start/Stop button.
X Briefly press button 0085.
Folding the exterior mirrors in or out
automatically If the "Fold in mirrors when locking" function
is activated in the on-board computer
(Y page 156): R
the exterior mirrors fold in automatically as
soon as you lock the vehicle from the
outside.
R the exterior mirrors fold out again
automatically as soon as you unlock the
vehicle and then open the driver's or front-
passenger door.
i The mirrors do not fold out if they have
been folded in manually.
Exterior mirror pushed out of position If an exterior mirror has been pushed out of
position, proceed as follows:
X
Vehicles without electrically folding
exterior mirrors: move the exterior mirror
into the correct position manually.
X Vehicles with electrically folding
exterior mirrors: press and hold mirror-
folding button until you hear a click and
then the mirrors engage in position
(Y page 88).
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
(Y page 87). Automatic anti-glare mirrors
G
WARNING
If incident light from headlamps is prevented
from striking the sensor in the rear-view
mirror, for instance, by luggage piled too high
in the vehicle, the mirror's automatic anti-
glare function will not operate.
Incident light could then blind you. This may
distract you from the traffic conditions and,
as a result, you may cause an accident.
The rear-view mirror and the exterior mirror
on the driver's side automatically go into anti-
glare mode if the following conditions are met
simultaneously:
R the ignition is switched on and
R incident light from headlamps strikes the
sensor in the rear-view mirror. 88
MirrorsSeats, steering wheel and mirrors