2019 MERCEDES-BENZ CLA engine

KEYLESS-GO
General notes
Bear in mind that the engine can be started byany of the vehicle occupants if there is a Smart-Key in the vehicle.
Locking and unlocking
You can start, lock or unlock the vehicle usingKEYLESS-GO. To do this, you only need carry theSmartKey with you. You can combine the func-tions of KEYLESS-GO with those of a conven-tional SmartKey. Unlock the vehicle by usingKEYLESS-GO, for instance, and lock it using the7button on the SmartKey.
The driver's door and the door at which the han-dle is used, must both be closed. The SmartKeymust be outside the vehicle. When locking orunlocking with KEYLESS-GO, the distancebetween the SmartKey and the correspondingdoor handle must not be greater than three feet(one meter).
A check which periodically establishes a radioconnection between the vehicle and the Smart-Key determines whether a valid SmartKey is inthe vehicle. This occurs, for example:
Rwhen starting the engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
Rduring convenience closing
XTo unlock the vehicle:touch the inner sur-face of the door handle.
XTo lock the vehicle:touch sensor surfaceCorD.
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 convenience clos-ing feature (Ypage 84).
XTo unlock the trunk lid:pull trunk lid han-dleC.
Deactivating and activating
If you do not intend to use the vehicle for a lon-ger period of time, you can deactivate KEYLESS-GO. 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 on theSmartKey twice in rapid succession.The indicator light on the SmartKey flashestwice briefly then one long flash, then KEY-LESS-GO is deactivated (Ypage 73).
XTo activate:press any button on the Smart-Key.
or
XInsert the SmartKey into the ignition lock.KEYLESS-GO and all of its associated featuresare available again.
KEYLESS-GO start function
General notes
Bear in mind that the engine can be started byany of the vehicle occupants if there is a Smart-Key in the vehicle.
SmartKey71
Opening and closing
Z

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

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

automatic operation by pressing/pulling theswitch again.
After opening the sliding sunroof, the roller sun-blind closes slightly automatically. This reducesdrafts in the vehicle interior.
If the sliding sunroof is raised at the rear, it low-ers slightly automatically at higher speeds. Thenoise level in the vehicle interior is reduced as aresult.
At low speeds it raises again automatically.
You can also temporarily deactivate automaticlowering. To do so, press theWswitch. Thesliding sunroof raises again automatically.
You can continue to operate the sliding sunroofafter switching off the engine or removing theSmartKey from the ignition lock. This functionremains active for five minutes or until you opena front door.
The sliding sunroof cannot be opened if a roofcarrier is installed. In order to allow ventilationof the vehicle interior, you can raise the slidingsunroof.
If contact is made with a roof carrier approvedby Mercedes-Benz, the sliding sunroof lowersslightly but remains raised at the rear.
Rain-closing feature
The rain-closing feature is only available for vehi-cles with a rain sensor.
When the SmartKey is in positionZin the igni-tion lock or is removed, the sliding sunroofcloses automatically:
Rif it starts to rain.
Rat extreme outside temperatures.
Rafter six hours.
Rif there is a malfunction in the power supply.
The panorama roof with power tilt/sliding panelremains raised at the rear in order to allow ven-tilation of the vehicle interior.
If the panorama roof with power tilt/slidingpanel is obstructed while being closed by therain-closing feature, it opens again slightly. Therain-closing feature is then deactivated.
The panorama roof with power tilt/sliding paneldoes not close if:
Rit is raised at the rear.
Rit is blocked.
Rno rain is falling on the area of the windshieldbeing monitored by the rain sensor. If thevehicle, for example, is under a bridge or in a
carport, the field of the sensor may be cov-ered.
Operating the roller sunblind for the
panorama roof with power tilt/sliding
panel
Important safety notes
GWARNING
Parts of the body could become trapped
between the roller sunblind and frame or slid-
ing sunroof during automatic opening or clos-
ing. There is a risk of injury.
When opening or closing, make sure that no
body parts are in the sweep of the roller sun-
blind.
If somebody becomes trapped:
Rrelease the switch immediately, or
Rduring automatic operation, push the
switch briefly in any direction
The opening or closing procedure will be stop-
ped.
The roller sunblind shields the vehicle interiorfrom sunlight. The roller sunblind can only beopened and closed when the panorama roofwith power tilt/sliding panel is closed.
Roller sunblind reversing feature
The roller sunblind is equipped with an auto-matic reversing feature. If a solid object blocksor restricts the roller sunblind during the closingprocess, the roller sunblind opens again auto-matically. The automatic reversing feature isonly an aid and is not a substitute for your atten-tiveness when closing the roller sunblind.
GWARNING
The reversing feature does not react:
Rto soft, light and thin objects, e.g. small fin-
gers
Rwhen closing the roller sunblind again man-
ually immediately after automatic reversal
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
88Panorama roof with power tilt/sliding panel
Opening and closing