ignition MERCEDES-BENZ GLC 2019 Service Manual

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp lights up. The redI(USA only)or$(Canada only) indicator lamp flashes for about ten secondsafter the electric parking brake has been applied or released. It thengoes out or remains lit.
The electric parking brake is malfunctioning.
XSwitch off the ignition and turn it back on.
XApply the electric parking brake.
If it is not possible to apply the electric parking brake:
XShift the transmission to position].
XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
XRelease the electric parking brake automatically (Ypage 155).
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
The yellow$warning lamp lights up. If you manually apply orrelease the electric parking brake, the redI(USA only) or$(Canada only) indicator lamp flashes.
The electric parking brake is malfunctioning. It is not possible to applythe electric parking brake manually.
XShift the transmission to position], as the electric parking brakeis not applied automatically.
XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
XRelease the electric parking brake automatically (Ypage 155).
I(USA
only)$(Canada
only)
Parking Brake Inop‐Parking Brake Inop‐erativeerative
The yellow$warning lamp lights up. The redI(USA only)or$(Canada only) indicator lamp flashes for about ten secondsafter the electric parking brake has been applied or released. It thengoes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-voltage or undervoltage.
XRemove the cause of the overvoltage or undervoltage, e.g. bycharging the battery or restarting the engine.
XApply or release the electric parking brake.
If it remains impossible to apply or release the electric parking brake:
XSwitch off the ignition and turn it back on.
XApply or release the electric parking brake.
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
If the electric parking brake still cannot be applied:
XVisit a qualified specialist workshop.
232Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
FrontFrontPassengerPassengerAir‐Air‐bag Disabled Seebag Disabled SeeOperator's ManualOperator's Manual
The front-passenger front air bag is deactivated during the journey,even though:
Ran adult
or
Ra person of the corresponding stature is on the front-passenger seat
If additional forces are applied to the seat, the system may interpretthe occupant's weight as lower than it actually is.
GWARNING
The front-passenger front air bag does not deploy during an accident.
There is an increased risk of injury.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 152).
XSwitch the ignition off.
XHave the occupant on the front-passenger seat get out of the vehi-cle.
XKeep the seat unoccupied, close the front-passenger door andswitch on the ignition.
XObserve the PASSENGER AIR BAG indicator lamps in the centerconsole and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
Ra self-diagnosis is carried out. The PASSENGER AIR BAG OFF andPASSENGER AIR BAG ON indicator lamps must light up simulta-neously for approximately six seconds.
Rthe PASSENGER AIR BAG OFF indicator lamp must then light upand remain lit after the self-diagnosis. If the indicator lamp is on,OCS (Occupant Classification System) has disabled the front-passenger front air bag (Ypage 51)
Rthe display messagesFront Passenger Airbag EnabledFront Passenger Airbag EnabledSee Operator's ManualSee Operator's ManualorFront Passenger Airbag Dis‐Front Passenger Airbag Dis‐abled See Operator's Manualabled See Operator's Manualmust not appear in the multi-function display
XWait for a period of at least 60 seconds until the necessary systemchecks have been completed.
XMake sure that the display messages do not appear in the multi-function display.
If these conditions are fulfilled, the front-passenger seat can be occu-pied again. Whether the PASSENGER AIR BAG OFF indicator lampremains lit or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating correctly.
XVisit a qualified specialist workshop immediately.
Further information about the Occupant Classification System(Ypage 51).
Displaymessages237
On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
FrontFrontPassengerPassengerAir‐Air‐bag Enabled Seebag Enabled SeeOperator's ManualOperator's Manual
The front-passenger front air bag is activated during the journey, eventhough:
Ra child, a small adult or an object weighing less than the system'sweight threshold is located on the front-passenger seat
or
Rthe front-passenger seat is unoccupied
The system may detect objects or forces applying additional weight onthe seat.
GWARNING
The front-passenger front air bag may deploy unintentionally.
There is an increased risk of injury.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 152).
XSwitch the ignition off.
XOpen the front-passenger door.
XRemove the child and the child restraint system from the front-passenger seat.
XMake sure that there are no objects on the seat adding to theweight.The system might otherwise detect the additional weight and inter-pret the seat occupant's weight as greater than it actually is.
XKeep the seat unoccupied, close the front-passenger door andswitch on the ignition.
XObserve the PASSENGER AIR BAG indicator lamps in the centerconsole and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
Ra self-diagnosis is carried out. The PASSENGER AIR BAG OFF andPASSENGER AIR BAG ON indicator lamps must light up simulta-neously for approximately six seconds.
Rthe PASSENGER AIR BAG OFF indicator lamp must then light upand remain lit after the self-diagnosis. If the indicator lamp is on,OCS has disabled the front-passenger front air bag (Ypage 51)
Rthe display messagesFront Passenger Airbag EnabledFront Passenger Airbag EnabledSee Operator's ManualSee Operator's ManualorFront Passenger Airbag Dis‐Front Passenger Airbag Dis‐abled See Operator's Manualabled See Operator's Manualmust not appear in the multi-function display
XWait for a period of at least 60 seconds until the necessary systemchecks have been completed.
XMake sure that the display messages do not appear in the multi-function display.
If these conditions are fulfilled, the front-passenger seat can be occu-pied again. Whether the PASSENGER AIR BAG OFF indicator lampremains lit or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating correctly.
XVisit a qualified specialist workshop immediately.
238Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
Active Parking Assist is unavailable or faulty.
XSwitch off the ignition and restart the engine.
If Active Parking Assist continues to be unavailable (the]symboldoes not appear on the multifunction display):
XVisit a qualified specialist workshop.
Active ParkingActive ParkingAssist FinishedAssist FinishedThe vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
TrafficTrafficSignSignAssistAssistCurrently Unavaila‐Currently Unavaila‐ble See Operator'sble See Operator'sManualManual
Traffic Sign Assist is temporarily inoperative.
Possible causes are:
Rthe windshield in the camera's field of vision is dirty
Rvisibility is impaired due to heavy rain, snow or fog
XClean the windshield.
If the system detects that the camera is fully operational, the displaymessage disappears.
Traffic Sign Assist is operational again.
TrafficTrafficSignSignAssistAssistInoperativeInoperativeTraffic Sign Assist is malfunctioning.
XVisit a qualified specialist workshop.

12 V sockets
General notes
XTurn the SmartKey to positionGin the igni-tion lock (Ypage 131).
The sockets can be used for accessories with amaximum draw of 180 W (15 A). Accessoriesinclude such items as chargers for mobilephones.
If you use the sockets for long periods when theengine is switched off, the battery may dis-charge.
An emergency cut-out ensures that the on-board voltage does not drop too low. If the on-board voltage is too low, the power to the sock-ets is automatically cut. This ensures that thereis sufficient power to start the engine.
If you have connected a device to the 12 Vsocket, leave the cover of the stowage com-partment open. This prevents the cover frombeing blocked.
Socket in the front center console
12 V socket (example)
XTo open:open the stowage compartment(Ypage 279).
XLift up the cover of socketD.
XTo close:push coverCof the stowage com-partment closed.
Socket in the rear compartment center
console
XPull coverDout by its top edge.
XLift up the cover of socketC.
Socket in the cargo compartment
XLift up the cover of socketC.
115 V socket
Important safety notes
GDANGER
When a suitable device is connected, the
115 V power socket will be carrying a high
voltage. You could receive an electric shock if
the connector cable or the 115 V power
socket is pulled out of the trim or is damaged
or wet. There is a risk of fatal injury.
RUse only connector cables that are dry and
free of damage.
RWhen the ignition is off, make sure that the
115 V power socket is dry.
292Features
Stowage and features

RHave the 115 V power socket checked or
replaced immediately at a qualified speci-
alized workshop if it is damaged or has been
pulled out of the trim.
RNever plug the connector cable into a 115 V
power socket that is damaged or has been
pulled out of the trim.
GDANGER
If you reach into the power socket or plug
inappropriate devices into the power socket,
you could receive an electric shock. There is a
risk of fatal injury.
Only connect appropriate devices to the
power socket.
!Note that work and repairs on the 115 Vpower socket should only be carried out byqualified specialist personnel.
General notes
The 115 V power socket provides an alternatingvoltage of 115 V so that small electronic devicescan be connected. These devices, such asgames consoles, chargers and laptops, must notconsume more than a maximum of 150 wattsaltogether.
Requirements for operation of these devices:
Rthe electronic device that you connect has asuitable connector and conforms to stand-ards specific to the country you are in.
Rthe plug of the electronic device is pluggedcorrectly into 115 V power socket.
Rthe maximum wattage of the device to beconnected must not exceed 150 watts.
Rthe on-board power supply is within a permis-sible voltage range.
Rthe 12 V sockets in the rear compartment andthe cargo compartment are operational.
Using the 115 V power socket
XTo switch on:switch the ignition on.
XOpen flap

Engine compartment
Hood
Important safety notes
GWARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. Before
every trip, ensure that the hood is locked.
GWARNING
When opening and closing the hood, it may
suddenly fall into the closed position. There is
a risk of injury to persons within range of
movement of the hood.
Open and close the hood only when no one is
within its range of movement.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
To ensure the flow of fresh air through the airvents into the vehicle interior, please observethe following notes (Ypage 128):
Opening the hood
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
!Make sure that the windshield wipers arenot folded away from the windshield. Youcould otherwise damage the windshield wip-ers or the hood.
XMake sure that the windshield wipers areturned off.
XPull release leverCon the hood.The hood is released.
Engine compartment299
Maintenance and care
Z

XReach into the gap, pull hood catch handleDup and lift the hood.
If you lift the hood by approximately 15 in(40 cm), the hood is opened and held openautomatically by the gas-filled strut.
Closing the hood
XLower the hood and let it fall from a height ofapproximately 8 in (20 cm).
XCheck that the hood has engaged properly.If the hood can be raised slightly, it is notproperly engaged. Open it again and close itwith a little more force.
Radiator
Do not cover up the radiator, such as with athermal mat or insect protection cover. Other-wise, the values of the European on-board diag-nostics may be affected. Some of these read-ings are required by law and must be accurate atall times.
Engine oil
Important safety notes
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
If engine oil comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck. Let the engine cool down and
thoroughly clean the engine oil off the com-
ponents before starting the engine.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
General notes
Depending on your driving style, the vehicleconsumes up to 0.9 US qt (0.8 l) of oil per600 miles(1,000 km). The oil consumption maybe higher than this when the vehicle is new or ifyou frequently drive at high engine speeds.
Depending on the engine, the oil dipstick may bein a different location.
300Engine compartment
Maintenance and care

Mercedes-Benz Specifications for ServiceProducts is available at any authorizedMercedes-Benz Center.
The following cause engine failure or damageto the exhaust system:
RUse of engine oils and oil filters that havenot been expressly approved for the servicesystem
RReplacement of engine oil and oil filter afterthe replacement interval specified by theservice system has expired
RUse of engine oil additives
!Do not add too much oil. adding too muchengine oil can result in damage to the engineor to the catalytic converter. Have excessengine oil siphoned off.
Add engine oil (example)
XTurn capCcounter-clockwise and remove it.
XAdd engine oil.If the oil level is at or below the MIN mark onthe oil dipstick, add 1.1 US qt (1.0l)of engineoil.
XReplace capCon the filler neck and tightenclockwise.Ensure that the cap locks into place securely.
XCheck the oil level again with the oil dipstick(Ypage 301).
Further information on engine oil (Ypage 360).
Additional service products
Important safety notes
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear protective gloves and protective
eyewear when opening. Open the cap slowly
to release pressure.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
302Engine compartment
Maintenance and care

Mercedes-Benz Center, or athttp://www.mbusa.com (USA only).
iThe ASSYST PLUS service interval displaydoes not show any information on the engineoil level. Observe the notes on the engine oillevel (Ypage 300).
The multifunction display shows a service mes-sage for several seconds, e.g.:
RService A in XX DaysService A in XX Days
RService A DueService A Due
RService A Overdue by XX DaysService A Overdue by XX Days
Depending on the operating conditions of thevehicle, the remaining time or distance until thenext service due date is displayed.
The letterAAorBB, possibly in conjunction with anumber or another letter, indicates the type ofservice.AAstands for a minor service andBBfor amajor service.
You can obtain further information from anauthorized Mercedes-Benz Center.
The ASSYST PLUS service interval display doesnot take into account any periods of time duringwhich the battery is disconnected.
Maintaining the time-dependent service sched-ule:
XNote down the service due date displayed inthe multifunction display before disconnect-ing the battery.
or
XAfter reconnecting the battery, subtract thebattery disconnection periods from the ser-vice date shown on the display.
Hiding a service message
XPress thevor8button on the steeringwheel.
Displaying service messages
XSwitch on the ignition.
XUse