ignition MERCEDES-BENZ SLC 2019 User Guide

Locking/unlocking centrally
You can start, lock or unlock the vehicle usingKEYLESS-GO. To do this, you only need carrythe SmartKey with you. You can combine thefunctions of KEYLESS-GO with those of a con-ventional SmartKey. Unlock the vehicle byusing KEYLESS-GO, for instance, and lock itusing the7button on the SmartKey.
The driver's door and the door at which thehandle is used, must both be closed. TheSmartKey must be outside the vehicle. Whenlocking or unlocking with KEYLESS-GO, thedistance between the key and the correspond-ing door handle must not be greater than 3 ft(1 m).
A check which periodically establishes a radioconnection between the vehicle and theSmartKey determines whether a valid Smart-Key is in the vehicle. This occurs, for example:
Rwhen starting the engine
Rwhile driving
Rwhen the external door handles are touched
XTo unlock the vehicle:touch the inner sur-face of the door handle.
XTo lock the vehicle:touch sensor sur-faceCorD.
Make sure that you do not touch the innersurface of the door handle.
XConvenience closing feature:touchrecessed sensor surfaceDfor an extendedperiod.
Further information on the convenienceclosing feature (Ypage 77).
Deactivating and activating
If you do not intend to use a SmartKey for anextended period of time, you can deactivatethe KEYLESS-GO function of the key. The
SmartKey will then use very little power,thereby conserving battery power. For the pur-poses of activation/deactivation, the vehiclemust not be nearby.
XTo deactivate:press the7button onthe SmartKey twice in rapid succession.The battery check lamp (Ypage 69) of theSmartKey flashes twice briefly and lights uponce, then KEYLESS-GO is deactivated.
XTo activate:press any button on the Smart-Key.
or
XInsert the SmartKey into the ignition lock.KEYLESS-GO and all of its associated fea-tures are available again.
Changing the settings of the locking
system
You can change the settings of the lockingsystem. This means only the driver's door, thelockable stowage compartments in the vehicleinterior and the fuel filler flap are unlockedwhen the vehicle is unlocked. This is useful ifyou frequently travel alone.
XTo change the setting:press and holddown the6and7buttons simultane-ously for about six seconds until the batteryindicator lamp (Ypage 69) flashes twice.
If the setting of the locking system is changedwithin the signal range of the vehicle, pressingthe7or6button:
Rlocks or
Runlocks the vehicle
The SmartKey now functions as follows:
XTo unlock:press the6button once.
XTo unlock centrally:press the6buttontwice.
XTo lock centrally:press the7button.
The KEYLESS-GO function is changed as fol-lows:
XTo unlock the driver's door:touch theinner surface of the door handle on the driv-er's door.
XTo unlock centrally:touch the inner sur-face of the driver or front-passenger doorhandle.
XTo lock centrally:touch the outer sensorsurface on one of the door handles.
SmartKey67
Opening and closing
Z

ProblemPossible causes/consequences andPPSolutions
The engine cannot bestarted using the Smart-Key.
The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interiorlighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary(Ypage 259).
or
XJump-start the vehicle (Ypage 260).
or
XConsult a qualified specialist workshop.
The engine cannot bestarted using KEYLESS-GO. The SmartKey is inthe vehicle.
The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 69) and replace it if neces-sary (Ypage 69).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
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.
You have lost themechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
The side windows can-not be opened or closedusing the convenienceopening/closing fea-ture.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 69) and replace it if neces-sary (Ypage 69).
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehi-
cle, they could:
Roperate the vehicle's equipment
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake
Rshift the automatic transmission out of
park position]
Rstart the engine
There is a risk of an accident and injury.
Doors71
Opening and closing
Z

Automatic locking feature
XTo deactivate:press and hold buttonCforabout five seconds until a tone sounds.
XTo activate:press and hold buttonDforabout five seconds until a tone sounds.
If you press one of the two buttons and do nothear a tone, the relevant setting has alreadybeen selected.
The vehicle is locked automatically when theignition is switched on and the wheels areturning.
You could therefore lock yourself out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on a roller dynamometer.
You can also switch the automatic lockingfunction on and off using the on-board com-puter (Ypage 178).
Unlocking/locking the driver's door
using the mechanical key
iIf you want to centrally lock the vehicleusing the mechanical key, begin by pressingthe locking button for the interior lockingmechanism while the driver's door is open.Then lock the driver's door using themechanical key.
XTo unlock:turn the mechanical key coun-ter-clockwise as far as it will go to positionG.
XTo lock:turn the mechanical key clockwiseas far as it will go to positionG.
If you use the mechanical key to unlock andopen the driver's door, the anti-theft alarmsystem will be triggered. Switch off the alarm(Ypage 64).
Trunk
Important safety notes
GWARNING
If objects, luggage or loads are not secured
or not secured sufficiently, they could slip,
tip over or be flung around and thereby hit
vehicle occupants. There is a risk of injury,
particularly in the event of sudden braking
or a sudden change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards whenopened. Therefore, make sure that there issufficient clearance above the trunk lid.
!Only close the trunk once the roof is low-ered completely. Otherwise, you could dam-age the roof.
If you close the trunk lid before the roof islowered completely, the loading aid switchlights up and a warning tone sounds.
Trunk73
Opening and closing
Z

one of the front side windows during the clos-ing process, the side window opens againautomatically. During the manual closing proc-ess, the side window only opens again auto-matically after the corresponding switch isreleased. However, the automatic reversingfeature is only an aid and does not relieve youof the responsibility of paying attention whenclosing a side window.
GWARNING
The reversing feature does not respond:
Rto soft, light and thin objects, e.g. fingers
Rover the last 1/6 in (4 mm) of the closing
movement
Rwhile adjusting
Rwhen closing the side window again man-
ually immediately after automatic revers-
ing
This means that the reversing feature can-
not 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
someone becomes trapped, press the
switch to open the side window again.
Opening and closing the side win-
dows in the front
The switches for the front side windows arelocated on the driver's door. There is also aswitch for the front-passenger side window onthe front-passenger door.
The switches on the driver's door take prece-dence.
CLeft
DRight
XTurn the SmartKey to positionGorHinthe ignition lock.
XTo open manually:press and hold the cor-responding switch.
XTo open fully:press the switch beyond thepressure point and release it.Automatic operation is started.
XTo close manually:pull the correspondingswitch and hold it.
XTo close fully:pull the switch beyond thepressure point and release it.Automatic operation is started.
XTo interrupt automatic operation:pressor pull the corresponding switch again.
You can continue to operate the side windowsafter you switch off the engine. This function isavailable for up to five minutes or until thedriver's or front-passenger door is opened.
Opening and closing all side win-
dows
Using the switch on the center con-
sole
GWARNING
While opening the side windows, body parts
in the closing area could become trapped.
There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
somebody becomes trapped, release the
switch or press the switch down to open the
side window again.
76Side windows
Opening and closing

You can use the switch on the center consoleto close all side windows simultaneously.
XOpen the cover in the lower center console.The switch for all side windows is under thecover.
XTo open all side windows:press buttonCto the point of resistance.
XTo open all side windows fully:pressswitchCbeyond the point of resistance.
XTo close all side windows:pull switchC.All side windows begin the closing proce-dure simultaneously. The rear side windowsclose after the front side windows.
If, after opening the windows, you close oneside window using the switch in the door con-trol panel:
Rthe front side window closes first and
Rthen the corresponding rear side windowcloses.
Convenience closing with KEYLESS-GO
GWARNING
When using the convenience closing feature,
parts of the body could be trapped in the
closing area when a side window is being
closed. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is
operating. Make sure that no body parts are
in close proximity during the closing proce-
dure.
Proceed as follows if someone is trapped:
XRelease the recessed sensor surface on thedoor handle.
XImmediately pull and hold the door handleand keep the door handle pulled.The side windows open.
With KEYLESS-GO you can close all side win-dows simultaneously. The KEYLESS-GO keymust be outside the vehicle. All the doorsmust be closed.
XTouch recessed sensor surfaceCon thedoor handle until the side windows are fullyclosed.
iMake sure you only touch recessed sensorsurfaceC.
XTo interrupt convenience closing:releaserecessed sensor surfaceCon the doorhandle.
Resetting the side windows
If a side window can no longer be closed fully,you must reset it.
XClose all the doors.
XTurn the SmartKey to positionGorHinthe ignition lock.
XPull the corresponding switch on the doorcontrol panel until the side window is com-pletely closed (Ypage 76).
XHold the switch for an additional second.
If the side window opens again slightly:
XImmediately pull the corresponding switchon the door control panel until the side win-dow is completely closed (Ypage 76).
XHold the switch for an additional second.If the respective side window remainsclosed after the button is released, then it
Side windows77
Opening and closing
Z

If you operate the roof switch and theTrunk Partition OpenTrunk Partition Openmessage appearsin the multifunction display, the trunk parti-tion is not closed correctly.
XClose the trunk partition.
XTo close:press and hold soft-top switchCuntil the soft top is fully closed.TheVario-Roof in OperationVario-Roof in Operationmessageappears in the multifunction display. Oncethe opening procedure is complete, themessage disappears and a tone sounds.
All of the side windows open.
XTo close all side windows, pull the switchunder the cover of the center console(Ypage 76).
Opening/closing using the SmartKey
Important safety notes
GWARNING
When opening or closing the roof, body
parts could be trapped by, for example, the
roof mechanism, trunk lid or side windows.
There is a risk of injury.
When raising or lowering the roof, make
sure that no body parts are in the vicinity of
moving components. If someone becomes
trapped, release the button.
Opening and closing
This function is only available on vehicles withKEYLESS-GO or with roof comfort operation.
XClose the trunk lid (Ypage 73).
XVehicles with comfort operation:pointthe tip of the SmartKey at the driver's doorhandle.
XVehicles with KEYLESS-GO:the SmartKeymust be within 6 ft (2 m) of the vehicle.
XTo open:press and hold the6button onthe SmartKey until the roof is fully opened.The roof and the rear side windows open.The front side windows close.
XTo interrupt the opening procedure:release the6button.
XTo open the front side windows:press the6button on the SmartKey again.
XTo close:press and hold the7buttonon the SmartKey until the roof is fullyclosed.The roof and the side windows close.
XTo interrupt the closing procedure:release the7button.
Locking the roof again
Important safety notes
GWARNING
If you do not fully open/close the soft top,
the soft-top hydraulics depressurize after a
short time. This causes the soft top to lower
unexpectedly and may cause you or others
to be trapped. There is a risk of injury.
Always open or close the soft top com-
pletely.
The roof is not locked if:
RtheYsymbol and theVario-Roof inVario-Roof inOperationOperationmessage appear in the multi-function display
RtheYsymbol and theOpen/CloseOpen/CloseVario-Roof CompletelyVario-Roof Completelymessage appearin the multifunction display and you hear awarning tone
Ryou hear a warning tone for up to ten sec-onds when pulling away or while driving
Locking
You can lock the roof again if it is not lockedfully.
XPull over and stop the vehicle safely as soonas possible, paying attention to road andtraffic conditions.
XEnsure that the SmartKey is in positionHin the ignition lock.
XPress the roof switch (Ypage 79).
Trunk partition
General notes
!To avoid damaging the roof or luggagewhen folding back the roof, you should:
80Roof
Opening and closing

Problems with the roof
ProblemPossible causes/consequences andPPSolutions
The roof will not open orclose.The trunk partition is not closed and not properly engaged.
XClose the trunk partition (Ypage 80).
The trunk lid is open.
XClose the trunk lid (Ypage 74).
The on-board voltage is too low.
XLeave the engine running.
The roof has been opened and closed several times in a row. Theroof drive has switched off automatically.
You can open and close the roof again after approximately tenminutes.
XSwitch off the ignition and turn it back on.
XRepeat the opening or closing procedure.
The automatic roof system is faulty.
XVisit a qualified specialist workshop.
84Roof
Opening and closing

"Digital Vehicle Key" function is activated via
Mercedes me connect. Never leave children
unsupervised in the vehicle.
The seats can still be adjusted when there isno SmartKey in the ignition lock.
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.
When adjusting a seat, make sure that no
one has any body parts in the sweep of the
seat.
GWARNING
If the driver's seat is not engaged, it could
move forwards as far as the next catch dur-
ing movement such as braking or abrupt
changes of direction. As a result, you would
be pushed against your seat belt by the
unsecured driver's seat.
This could cause you to lose control of the
vehicle. The seat belt cannot protect as
intended and could result in additional
injury.
There is a risk of an accident and injury.
Before every journey, make sure that the
driver's seat is fully engaged.
Observe the safety notes on "Air bags"(Ypage 43) and "Children in the vehicle"(Ypage 53).
GWARNING
If the driver's seat is not engaged, it could
move unexpectedly while the vehicle is in
motion. This could cause you to lose control
of the vehicle. There is a risk of an accident.
Always make sure that the driver's seat is
engaged before starting the vehicle.
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
adjustment 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
system.
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.
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,
steering wheel and mirror and fasten your
seat belt before starting the engine.
!To prevent damage to the seats and theseat heating, observe the following notes:
RDo not spill liquids onto the seats. Dry theseats as soon as possible if liquid doesget spilled on the seats.
RIf the seat covers are damp or wet, do notswitch on the seat heating. Also, do notuse the seat heating to dry the seats.
RClean the seat covers as recommended;see the "Interior care" section.
RDo not transport heavy loads on theseats. Do not place pointed objects onthe seat cushions such as knives, nails ortools. Where possible, use the seats onlyfor carrying passengers.
RWhen operating the seat heating, do notcover the seats with insulating materials,
86Seats
Seats, steering wheel and mirrors

Problems with the seat heating
ProblemPossible causes/consequences andPPSolutions
The seat heating hasswitched off prema-turely or cannot beswitched on. The vehi-cle's electrical systemvoltage is too lowbecause too many elec-trical consumers areswitched on.
Switch off electrical consumers that you do not need, such as therear window defroster or interior lighting.
Once the battery is sufficiently charged, switch on the seat heatingagain.
AIRSCARF
Setting head level heating (AIRSCARF)
GWARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head
restraints. This could result in burns in the
immediate vicinity of the air vents. There is a
risk of injury.
Reduce the heater output before it becomes
too hot.
The AIRSCARF function warms the head andneck area of vehicle occupants with warm air.The warm air flows out of the holes in the headrestraints.
The three red indicator lamps in the buttonindicate the heating level you have selected.
XEnsure that the SmartKey is in positionHin the ignition lock.
XTo switch on:press buttonC.Three red indicator lamps in the button lightup. The blower starts up after a preheatingphase of seven seconds.
XPress buttonCrepeatedly until the desiredheating level is set.
XTo switch off:press buttonCrepeatedlyuntil all the indicator lamps go out.
iThe blower continues running for sevenseconds to cool down the heating elements.
iIf the battery voltage is too low, AIRSCARFmay switch off.
Problems with AIRSCARF
AIRSCARF has switched off prematurely or willnot switch on. The vehicle's electrical systemvoltage is too low because too many electricalconsumers are switched on.
XSwitch off electrical consumers that you donot need, such as the rear window defrosteror interior lighting.
XSwitch on AIRSCARF again.
Steering wheel
Important safety notes
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.
Steering wheel89
Seats, steering wheel and mirrors
Z

Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
Never leave children unsupervised in the
vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies for the Digital Vehicle Key if the
"Digital Vehicle Key" function is activated via
Mercedes me connect.
The electrically adjustable steering wheel canstill be adjusted when there is no SmartKey inthe ignition lock.
Adjusting the steering wheel man-
ually
GWARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is a risk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
CRelease lever
DAdjusts the steering wheel height