key MERCEDES-BENZ CLA 2019 Owner's Manual

SmartKey battery
Important safety notes
GWARNING
Batteries contain toxic and corrosive substan-
ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal
injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
The SmartKey batteries contain perchloratematerial, which may require special handlingand regard for the environment. National guide-lines must be observed during disposal. In Cal-ifornia, seewww.dtsc.ca.gov/HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have thebattery replaced at a qualified specialist work-shop.
Checking the battery
XPress the7or6button.The battery is working properly if batterycheck lampClights up briefly.
The battery is discharged if battery checklampCdoes not light up briefly.
XChange the battery (Ypage 73).
iIf the SmartKey battery is checked withinthe signal reception range of the vehicle,pressing the7or6button:
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 SmartKey(Ypage 72).
XPress mechanical keyDinto the opening inthe SmartKey in the direction of the arrowuntil battery tray coverCopens. When doingso, do not hold coverCshut.
XRemove battery tray coverC.
XRepeatedly tap the SmartKey against yourpalm until battery

Problems with the SmartKey
ProblemPossible causes/consequences andPPSolutions
You cannot lock orunlock the vehicle usingthe SmartKey.
The SmartKey battery is discharged or nearly discharged.
XVehicles without KEYLESS-GO or KEYLESS-GO start function:try to lock/unlock the vehicle again using the SmartKey's remotecontrol function. Point the tip of the SmartKey at the driver's doorhandle from close range and press the6or7button.
If this does not work:
XCheck the SmartKey battery (Ypage 73) and replace it if necessary(Ypage 73).
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
There is interference from a powerful source of radio waves.
XVehicles without KEYLESS-GO or KEYLESS-GO start function:try to lock/unlock the vehicle again using the SmartKey's remotecontrol function. Point the tip of the SmartKey at the driver's doorhandle from close range and press the6or7button.
If this does not work:
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
The SmartKey is faulty.
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
XHave the SmartKey checked at a qualified specialist workshop.
You can no longer lock orunlock the vehicle usingKEYLESS-GO.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 73) and replace it if necessary(Ypage 73).
If this does not work:
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
74SmartKey
Opening and closing

ProblemPossible causes/consequences andPPSolutions
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of theSmartKey.
XHave the vehicle and SmartKey checked at a qualified specialistworkshop.
If the vehicle can also not be locked/unlocked using the remote con-trol function:
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using themechanical key.
XHave the vehicle and SmartKey checked at a qualified specialistworkshop.
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 281).
or
XJump-start the vehicle (Ypage 282).
or
XConsult a qualified specialist workshop.
The engine cannot bestarted using the Start/Stop button. The Smart-Key is in the 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 73) and replace it if necessary(Ypage 73).
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 workshop.
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.
SmartKey75
Opening and closing
Z

Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
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.
Never leave children or animals unattended 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.
You should preferably place luggage or loads inthe cargo compartment. Observe the loadingguidelines (Ypage 239).
Unlocking and opening doors from
the inside
!The side windows will not open/close if thebattery is discharged or if the side windowshave iced up. It will then not be possible toclose the door. Do not attempt to force thedoor closed. You could otherwise damage thedoor or the side window.
When a door is opened, the side window on thatside opens slightly. When the door is closed, theside window closes again.
XTo unlock and open a front door:pull doorhandleD.If the door is locked, locking knobCpops up.The door is unlocked and opens.
XTo unlock a rear door:pull up lockingknobC.The door is unlocked and can be opened.
XTo open a rear door:pull door handleD.
You can open a door from inside the vehicleeven if it has been locked. You can only open therear doors from inside the vehicle if they are notsecured by the child-proof locks (Ypage 60).
If the vehicle has previously been locked withthe SmartKey from the outside, opening a doorfrom the inside will trigger the anti-theft alarmsystem. Switch off the alarm (Ypage 68).
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle fromthe inside. This can be useful if you wish to lockthe vehicle before pulling away, for example.
XTo unlock:press buttonC.
XTo lock:press buttonD.If all the doors and the trunk lid are closed, thevehicle locks.
76Doors
Opening and closing

Meanwhile, the fuel filler flap will not be lockedor unlocked.
You cannot unlock the vehicle centrally from theinside if the vehicle has been locked with theSmartKey or KEYLESS-GO.
You can open a door from inside the vehicleeven if it has been locked. You can open the reardoors from inside the vehicle unless they aresecured by the child-proof lock (Ypage 60).
If the vehicle has previously been locked withthe SmartKey from the outside, opening a doorfrom the inside will trigger the anti-theft alarmsystem. Switch off the alarm (Ypage 68).
If a locked door is opened from the inside, theprevious unlock status of the vehicle will betaken into consideration if:
Rthe vehicle was locked using the locking but-ton for the central locking, or
Rif the vehicle was locked automatically
The vehicle will be fully unlocked if it had previ-ously been fully unlocked. If only the driver'sdoor had been previously unlocked, only thedoor which has been opened from the inside isunlocked.
Automatic locking feature
XTo deactivate:press and hold buttonCforapproximately five seconds until a tonesounds.
XTo activate:press and hold buttonDforapproximately five seconds until a tonesounds.
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 are turn-ing.
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 locking func-tion on and off using the on-board computer(Ypage 189).
Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be locked orunlocked with the SmartKey or KEYLESS-GO,use the mechanical key.
If you use the mechanical key to unlock andopen the driver's door, the anti-theft alarm sys-tem will be triggered. Switch off the alarm(Ypage 68).
XTake the mechanical key out of the SmartKey(Ypage 72).
XInsert the mechanical key into the lock of thedriver's door as far as it will go.
XTurn the mechanical key counter-clockwiseas far as it will go to positionG.The door is unlocked.
XTurn the mechanical key back and remove it.
XInsert mechanical key into the SmartKey(Ypage 72).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with theSmartKey or KEYLESS-GO, use the mechanicalkey.
XOpen the driver's door.
XClose the front-passenger door, the reardoors and the trunk lid.
Doors77
Opening and closing
Z

XPress the locking button on the driver’s door(Ypage 76).
XCheck whether the locking knobs on thefront-passenger door and the rear doors arestill visible. Press down the locking knobs byhand, if necessary.
XClose the driver's door.
XTake the mechanical key out of the SmartKey(Ypage 72).
XInsert the mechanical key into the lock of thedriver's door as far as it will go.
XTurn the mechanical key clockwise as far as itwill go to positionG.
XTurn the mechanical key back and remove it.
XMake sure that the doors and the trunk lid arelocked.
XInsert mechanical key into the SmartKey(Ypage 72).
iIf you lock the vehicle as described above,the fuel filler flap is not locked. The anti-theftalarm system is not armed.
Trunk
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 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. Never drive with the trunk lid
open.
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, particu-
larly in the event of sudden braking or a sud-
den 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 when opened.Therefore, make sure that there is sufficientclearance above the trunk lid.
The opening dimensions of the trunk lid can befound in the "Vehicle data" section(Ypage 325).
You should preferably place luggage or loads inthe trunk. Observe the loading guidelines(Ypage 239).
Do not leave the SmartKey in the trunk. Youcould otherwise lock yourself out.
The trunk lid can be:
Ropened and closed manually from outside
Ropened automatically from outside
Ropened automatically from inside
Ropened from the inside using the emergencyrelease
Tailgate obstruction detection with
reversing feature
On vehicles with an EASY-PACK tailgate, thetailgate is equipped with automatic obstaclerecognition with a reversing feature. If a solidobject blocks or restricts the tailgate when auto-matically opening or closing, this procedure isstopped. If the tailgate is stopped during theclosing process, the tailgate automaticallyopens again slightly. The automatic obstructiondetection with reversing feature is only an aid. Itis not a substitute for your attentiveness whenopening and closing the tailgate.
78Trunk
Opening and closing

GWARNING
The reversing feature does not respond:
Rto soft, light and thin objects, e.g. fingers
Rover the last 1/3 in (8 mm) of the closing
movement
The reversing feature cannot prevent some-
one from becoming trapped in these situa-
tions in particular. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
Rpress theTbutton on the SmartKey, or
Rpull or press the remote operating switch
on the driver's door or
Rpress the closing button/STOP button in
the tailgate or
Rpull the handle on the tailgate
Vehicles with HANDS-FREE ACCESS:it is alsopossible to stop the closing process by perform-ing a kicking movement under the rear bumper.
Opening/closing from outside
Opening
XPress the6button on the SmartKey.
XPull handleC.
XLift the trunk lid.
Closing
XPull down the trunk lid using handleC.
XLet the trunk lid drop into the lock.
XIf necessary, lock the vehicle with the7button on the SmartKey or with KEYLESS-GO.
Opening automatically from outside
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 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. Never drive with the trunk lid
open.
!The trunk lid swings upwards when opened.Therefore, make sure that there is sufficientclearance above the trunk lid.
iThe opening dimensions of the trunk lid canbe found under "Vehicle data" (Ypage 325).
Opening automatically
You can open the trunk lid automatically usingthe SmartKey or the handle in the trunk lid.
XPress and hold theTbutton on the Smart-Key until the trunk lid opens.
or
XIf the trunk lid is unlocked, pull the trunk lidhandle and let it go again immediately.
Trunk79
Opening and closing
Z

HANDS-FREE ACCESS
Important safety notes
GWARNING
The vehicle exhaust system can become very
hot. If you use HANDS-FREE ACCESS, you
could burn yourself by touching the exhaust
system. There is a risk of injury. Always
ensure that you make the kicking movement
only within the detection range of the sensors.
!If the SmartKey is within the rear detectionrange of KEYLESS-GO, the following situa-tions, for example, could lead to the uninten-tional opening of the trunk lid:
Rwhen using an automatic car wash
Rwhen using a power washer
Make sure that the SmartKey is at least 10 ft(3 m) away from the vehicle.
iYou can also deactivate KEYLESS-GO. Fur-ther information on deactivating and activat-ing KEYLESS-GO (Ypage 71).
General notes
With KEYLESS-GO and HANDS-FREE ACCESS,you can open the trunk lid without using yourhands. This is useful if you have your hands full.To do this, make a kicking movement under thebumper with your foot.
Observe the following points:
RCarry your KEYLESS-GO key about your per-son. The SmartKey must be at the rear of thevehicle in the detection range of KEYLESS-GO.
RWhen making the kicking movement, makesure that you are standing firmly on theground and that there is sufficient clearanceto the rear of the vehicle. You could otherwiselose your balance, for example on ice.
RAlways ensure that you only make the kickingmovement within the detection range of sen-sorsC.
RStand at least 12 in (30 cm) away from therear area while doing so.
RDo not come into contact with the bumperwhile making the kicking movement. Other-wise, the sensors may not function correctly.
RHANDS-FREE ACCESS does not function dur-ing engine start.
RDirt caused by road salt or snow around sen-sorsCmay restrict functionality.
Using the HANDS-FREE ACCESS with a pros-thetic leg may restrict functionality.
RIf a KEYLESS-GO key is at the rear of the vehi-cle in the detection range of KEYLESS-GO,HANDS-FREE ACCESS could be triggered.The trunk lid could thus be opened uninten-tionally, for example, when you:
-set something down or lift something upbehind the vehicle.
-polish the rear of the vehicle.
Do not carry the KEYLESS-GO key about yourperson in these situations or in situations sim-ilar to these. This will prevent the uninten-tional opening of the trunk lid.
80Trunk
Opening and closing

Operation
XTo open:kick your foot into sensor detectionzoneCbelow the bumper.
XIf the trunk lid does not open after severalattempts:wait at least ten seconds thenmove your leg under the bumper once again.
If you hold your foot under the bumper for toolong, the trunk lid does not open. Repeat the legmovement more quickly if this occurs.
Opening automatically from inside
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 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. Never drive with the trunk lid
open.
!The trunk lid swings upwards when opened.Therefore, make sure that there is sufficientclearance above the trunk lid.
The opening dimensions of the trunk lid can befound under "Vehicle data" (Ypage 325).
Opening
You can open the trunk lid from the driver's seatwhen the vehicle is stationary and unlocked.
XTo open:pull remote operating switchCforthe trunk lid until the trunk lid opens.
Limiting the opening angle of the tail-
gate
General notes
!Make sure there is sufficient clearance toopen the tailgate fully when setting the open-ing angle. The tailgate could otherwise bedamaged. Ideally, set the opening angle out-side.
You can limit the opening angle of the tailgate.This could be useful, for example, if there isinsufficient space above the tailgate. It is pos-sible to limit the tailgate in the top half of itsopening range.
To open the tailgate fully, pull the handle on theoutside of the tailgate again after it has stoppedautomatically. This does not delete the storedposition.
Activating
XTo open the tailgate:pull the handle on thetailgate.
XTo stop the opening procedure at thedesired position:
Rpress the closing button in the tailgate, or
Rpull the handle on the outside of the tailgateagain, or
Rpress the tailgate button on the SmartKey
XTo store the position:press and hold theclosing button on the tailgate until you hear ashort tone.The opening angle limiter is activated. Thetailgate will now stop in the stored positionwhen opening.
Trunk81
Opening and closing
Z

Deactivating
XPress and hold the closing button on the tail-gate until two short tones sound.
Emergency release for the trunk
General notes
!The trunk lid swings upwards when opened.Therefore, make sure that there is sufficientclearance above the trunk lid.
The opening dimensions of the trunk lid can befound in the "Vehicle data" section(Ypage 325).
If the trunk lid can no longer be unlocked:
Rusing the SmartKey, or
Rusing the remote operating switch in the doorcontrol panel:
Use the emergency release inside the trunk lid.
You can reach the emergency release via thetrunk.
Opening
XFold the rear seat backrest forwards(Ypage 242).
XInsert a suitable toolD, e.g. a screwdriver,into openingCin the paneling.The trunk lid is released.
XOpen the trunk lid.
Emergency release button
You can open the trunk lid from inside the vehi-cle with the emergency release button.
XPress emergency release buttonCbriefly.The trunk lid unlocks and opens.
The trunk lid can be unlocked and opened withthe trunk lid emergency release when the vehi-cle is stationary or while driving.
The trunk lid emergency release does not openthe trunk lid if the battery is disconnected ordischarged.
Trunk lid emergency release light:
REmergency release buttonCflashes for30 minutes after the trunk lid is opened.
REmergency release buttonCflashes for60 minutes after the trunk lid is closed.
Side windows
Important safety notes
GWARNING
While opening the side windows, body parts
could become trapped between the side win-
dow and the door frame as the side window
moves. There is a risk of injury.
Make sure that nobody touches the side win-
dow during the opening procedure. If some-
body becomes trapped, release the switch or
pull the switch to close the side window again.
GWARNING
While closing the side windows, body parts in
the closing area could become trapped. There
is a risk of injury.
When closing make sure that no parts of the
body are in the closing area. If somebody
becomes trapped, release the switch or press
the switch to open the side window again.
82Side windows
Opening and closing