check engine MERCEDES-BENZ GLC 2019 User Guide

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 (Ypage 133).
Changing the settings of the locking
system
You can change the settings of the locking sys-tem. This means that only the driver's door andthe fuel filler flap are unlocked when the vehicleis unlocked. This is useful if you frequently travelalone.
XTo change the setting:press and hold downthe6and7buttons simultaneouslyfor approximately six seconds until the bat-tery check lamp (Ypage 80) 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:press the7button.
XTo restore the factory settings:press andhold the6and7buttons simultane-ously for approximately six seconds until thebattery check lamp (Ypage 80) flashestwice.
The KEYLESS-GO functions can be changed asfollows:
XTo unlock the driver's door:touch the innersurface of the door handle on the driver'sdoor.
XTo unlock centrally:touch the inner surfaceof the door handle on the front-passengerdoor or the rear door.
XTo lock centrally:touch the outer sensorsurface on one of the door handles.
Mechanical key
General notes
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 75).
If you unlock the vehicle using the mechanicalkey, the fuel filler flap will not be unlocked auto-matically.
XTo unlock the fuel filler flap:insert theSmartKey into the ignition lock.
Removing the mechanical key
XPush release catchCin the direction of thearrow and at the same time remove mechan-ical keyDfrom the SmartKey.
For further information about:
RLocking/unlocking the driver's door(Ypage 84)
RUnlocking the tailgate (Ypage 89)
Inserting the mechanical key
XPush mechanical keyDcompletely into theSmartKey until it engages and releasecatchCis back in its basic position.
SmartKey79
Opening and closing
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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:
XLock or unlock the vehicle using the mechanical key (Ypage 84).
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 321).
or
XJump-start the vehicle (Ypage 322).
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 80) and replace it if necessary(Ypage 80).
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.
82SmartKey
Opening and closing

GWARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and cause a fire
Rlose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
!Do not warm up the engine while stationary.Pull away immediately. Avoid high enginespeeds and full throttle until the engine hasreached its operating temperature.
In vehicles with automatic transmission,engage positions P and R only when the vehi-cle is stationary.
Where possible, avoid spinning the drivewheels when pulling away on slippery roads.You could otherwise damage the drive train.
!Mercedes-AMG vehicles:at low engine oiltemperatures below 68 ‡ (+20 †), the max-imum engine speed is restricted in order toprotect the engine. To protect the engine andmaintain smooth engine operation, avoid driv-ing at full throttle when the engine is cold.
Key positions
SmartKey
ZTo remove the SmartKey
GPower supply for some consumers, such asthe windshield wipers
HIgnition (power supply for all consumers)and drive position
ITo start the engine
iThe SmartKey can be turned in the ignitionlock even if it is not the correct SmartKey forthe vehicle. The ignition is not switched on.The engine cannot be started.
Start/Stop button
General notes
When you insert the Start/Stop button into theignition lock, the system needs approximatelytwo seconds recognition time. You can then usethe Start/Stop button.
Pressing the Start/Stop button several times insuccession corresponds to the different Smart-Key positions in the ignition lock. This is only thecase if you are not depressing the brake pedal.
If you depress the brake pedal and press theStart/Stop button, the engine starts immedi-ately.
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, whenstarting the engine.
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Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park positionP
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GDANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine
running an enclosed space without adequate
ventilation.
GWARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
General notes
The catalytic converter is preheated for up to30 seconds after a cold start. The sound of theengine may change during this time.
Automatic transmission
XShift the transmission to position](Ypage 141).The transmission position indicator on themultifunction display shows](Ypage 142).
iYou can start the engine in transmissionposition]and\\.
Starting procedure with the SmartKey
To start the engine using the SmartKey insteadof the Start/Stop button, pull the Start/Stopbutton out of the ignition lock.
XTurn the SmartKey to positionIin the igni-tion lock and release it as soon as the engineis running.
If the engine will not start:
XRemove the SmartKey from the ignition lock.
XReinsert the SmartKey into the ignition lockafter a short waiting period.
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 131).The indicator lamps in the instrument clusterlight up (Ypage 256).
XTurn the SmartKey to positionIin the igni-tion lock (Ypage 131) and release it as soonas the engine is running.
Starting procedure with the Start/Stop
button
The Start/Stop button is only available on vehi-cles with KEYLESS-GO or the KEYLESS-GO startfunction.
The Start/Stop button can be used to start thevehicle manually without inserting the SmartKeyinto the ignition lock. The Start/Stop buttonmust be inserted in the ignition lock and theSmartKey must be in the vehicle. This mode forstarting the engine operates independently ofthe ECO start/stop automatic engine start func-tion.
You can start the engine if a valid SmartKey is inthe vehicle. Switch off the engine and always
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ProblemPossible causes/consequences andPPSolutions
The engine is not runningsmoothly and is misfir-ing.
There is a malfunction in the engine electronics or in a mechanicalcomponent of the engine management system.
XOnly depress the accelerator pedal slightly.Otherwise, non-combusted fuel may get into the catalytic converterand damage it.
XHave the cause rectified immediately at a qualified specialist work-shop.
The coolant temperaturedisplay indicates a valuewithin the red band.
The coolant level is too low. The coolant is too hot and the engine is nolonger being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant tocool down.
XCheck the coolant level (Ypage 303). Observe the warning notesas you do so and add coolant if necessary.
DYNAMIC SELECT switch
Mercedes-AMG vehicles
General information
Use the DYNAMIC SELECT switch to select thedrive program.
Available drive programs for Mercedes-AMG GLC 43 4MATIC:
S+Sport PlusParticularly sporty drivingcharacteristics
SSportSporty driving characteris-tics
CComfortComfortable and economi-cal driving characteristics
EEconomyParticularly economicaldriving characteristics
IIndividualIndividual settings
Available drive programs for Mercedes-AMG GLC 63 4MATIC+/GLC 63 S 4MATIC+:
RACE(S‑MODEL)Driving characteristics suit-able for a race circuit
S+Sport PlusParticularly sporty drivingcharacteristics
SSportSporty driving characteris-tics
CComfortComfortable and economi-cal driving characteristics
IIndividualIndividual settings
Depending on the drive program selected thefollowing vehicle characteristics will change:
Rthe drive (engine and transmission manage-ment)
Rthe suspension
Rthe steering
Rthe driver assistance systems
RESP®(Mercedes-AMG GLC 63 4MATIC+/GLC 63 S 4MATIC+)
Rthe position of the exhaust flap (Mercedes-AMG GLC 63 4MATIC+/GLC 63 S 4MATIC+)
Rthe setting of the ECO start/stop function
Rthe availability of gliding mode
Rthe climate control
Further information on automatic drive programcharacteristics (Ypage 145).
Additionally, in drive programIyou can config-ure the respective vehicle characteristics usingthe multimedia system. You can find informa-tion about this under "DYNAMIC SELECT" in thevehicle's Digital Operator's Manual.
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Problems with the transmission
ProblemPossible causes/consequences andPPSolutions
The transmission hasproblems shifting gear.The transmission is losing oil.
XHave the transmission checked at a qualified specialist workshopimmediately.
The acceleration abilityis deteriorating.
The transmission no lon-ger changes gear.
The transmission is in emergency mode.
It is possible to shift to a gear and reverse gear only.
XStop the vehicle.
XShift the transmission to position].
XSwitch off the engine.
XWait at least ten seconds before restarting the engine.
XShift the transmission to position[or^.If[is selected, the transmission only shifts to one gear; if^isselected, the transmission shifts to reverse gear.
XHave the transmission checked at a qualified specialist workshopimmediately.
Transfer case
This section is only valid for vehicles with 4-wheel drive (4MATIC). Power is always trans-mitted to both axles.
!Performance tests may only be carried outon a 2-axle dynamometer. The brake systemor transfer case could otherwise be damaged.Contact a qualified specialist workshop for aperformance test.
!Since ESP®engages automatically, the igni-tion must be switched off (the SmartKey orStart/Stop button must be in positionZorG) if
Rthe electrical parking brake is being testedusing a dynamometer
Rthe vehicle is being towed with only oneaxle raised (not permitted for vehicles with4MATIC)
Otherwise, the brake system can be dam-aged.
!Vehicles with 4MATIC must not be towedwith either the front or the rear axle raised, asdoing so will damage the transmission.
Refueling
Important safety notes
GWARNING
Fuel is highly flammable. Risk of fire and
explosion by improper handling of fuel.
You must avoid fire, open flames, smoking
and creating sparks. Switch off the ignition
before refueling and, if present, switch off the
auxiliary heating.
GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
150Refueling
Driving and parking

This helps you to avoid overheating thebrakes and wearing them out excessively.
When you take advantage of engine braking, adrive wheel may not turn for some time, e.g.on a slippery road surface. This could causedamage to the drive train. This type of damageis not covered by the Mercedes-Benz war-ranty.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantlyresults in excessive and premature wear tothe brake pads.
If the brakes have been subjected to a heavyload, do not stop the vehicle immediately. Driveon for a short while. This allows the airflow tocool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rainwithout braking, there may be a delayed reac-tion from the brakes when braking for the firsttime. This may also occur after the vehicle hasbeen washed or driven through deep water.
You have to depress the brake pedal morefirmly. Maintain a greater distance from thevehicle in front.
After driving on a wet road or having the vehiclewashed, brake firmly while paying attention tothe traffic conditions. This will warm up thebrake discs, thereby drying them more quicklyand protecting them against corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt resi-due may form on the brake discs and brakepads. This can result in a significantly longerbraking distance.
RIn order to prevent any salt build-up, apply thebrakes occasionally while paying attention tothe traffic conditions.
RCarefully depress the brake pedal and thebeginning and end of a journey.
RMaintain a greater distance to the vehicleahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up inthe instrument cluster and
Ryou hear a warning tone while the engine isrunning
Observe additional warning messages in themultifunction display.
The brake fluid level may be too low due tobrake pad wear or leaking brake lines.
Have the brake system checked immediately.Consult a qualified specialist workshop toarrange this.
!Vehicles with 4MATIC:function or per-formance tests may only be carried out on a 2-axle dynamometer. If you wish to operate thevehicle on such a dynamometer, please con-sult a qualified specialist workshop inadvance. You could otherwise damage thedrive train or the brake system.
!Vehicles with 4MATIC:the ESP®systemoperates automatically. If the electric parkingbrake is tested on a brake dynamometer, theengine and ignition must be switched off: turnthe SmartKey in the ignition lock to position

Rif there is a sudden change in temperature,e.g. when driving into a heated garage in win-ter
Rif the camera lens is dirty or obstructed.Observe the notes on cleaning(Ypage 309)
Rif the rear of your vehicle is damaged. In thiscase, have the camera position and settingchecked at a qualified specialist workshop
The field of vision and other functions of the rearview camera may be restricted due to additionalaccessories on the rear of the vehicle (e.g.license plate holder, rear bicycle rack).
The rear view camera is protected from rain-drops and dust by means of a flap. When the rearview camera is activated, this flap opens.
The flap closes again when:
Ryou have finished the maneuvering process
Ryou switch off the engine
Ryou open the cargo compartment
Observe the notes on cleaning (Ypage 309).
For technical reasons, the flap may remain openbriefly after the rear view camera has beendeactivated.
Activating/deactivating the rear view
camera
XTo activate:make sure that theActiva‐Activa‐
tion by R geartion by R gearfunction is selected in themultimedia system (see the Digital Operator'sManual).
XEngage reverse gear.The rear view camera flap opens. The multi-media system shows the area behind the vehi-cle with guide lines.
The image from the rear view camera is avail-able throughout the maneuvering process.
XTo switch the function mode for vehicleswith trailer tow hitch:using the controller,select symbolCfor the "Reverse parking"function or symbolDfor "Coupling up atrailer".The symbol of the selected function is high-lighted.
XTo deactivate:shift the transmission to posi-tion].
or
XDrive forwards at a speed greater than 7 mph(12 km/h).
Multimedia display
The rear view camera may show a distorted viewof obstacles, show them incorrectly or not at all.The rear view camera does not show objects inthe following positions:
Rvery close to the rear bumper
Runder the rear bumper
Rin the area immediately above the tailgatehandle
!Objects not at ground level may appear tobe further away than they actually are, e.g.:
Rthe bumper of a parked vehicle
Rthe drawbar of a trailer
Rthe ball coupling of a trailer tow hitch
Rthe rear section of an HGV
Ra slanted post
Use the guidelines only for orientation.Approach objects no further than the bottom-most guideline.
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Warning lamp
CWarning lamp
Blind Spot Assist is not active at speeds belowapproximately 20 mph (30 km/h). Vehicles inthe monitoring range are then not indicated.
If a vehicle is detected within the blind spotmonitoring range at speeds above 20 mph(30 km/h), warning lampCon the correspond-ing side lights up red. This warning is alwaysemitted when a vehicle enters the blind spotmonitoring range from behind or from the side.When you overtake a vehicle, the warning onlyoccurs if the difference in speed is less than7 mph (12 km/h).
If you select the reverse gear, Blind Spot Assistis not operational.
The brightness of the warning lamps is auto-matically adapted to the brightness of the sur-roundings.
Collision warning
If a vehicle is detected in the monitoring range ofBlind Spot Assist and you switch on the corre-sponding turn signal, a double warning tonesounds. The red warning lamp flashes on therelevant exterior mirror. If the turn signalremains on, detected vehicles are indicated bythe flashing of the red warning lamp on the exte-rior mirror. No further warning tone sounds.
Activating Blind Spot Assist
XMake sure that Blind Spot Assist is activatedin the on-board computer (Ypage 220).
XTurn the SmartKey to positionHin the igni-tion lock.The red warning lamps on the exterior mirrorslight up until the engine is started.
Display in the assistance graphic
When Blind Spot Assist is activated, gray radarwaves propagating backwards appear next tothe vehicle in the assistance display in the mul-tifunction display (Ypage 219). Above a speedof 20 mph (30 km/h), the color of the radarwaves in the assistance graphic changes togreenC. Blind Spot Assist is then ready for use.
Towing a trailer
When you attach a trailer, make sure you havecorrectly established the electrical connection.This can be accomplished by checking the trailerlighting. In this event, Blind Spot Assist is deac-tivated. TheBlindBlindSpotSpotAssistAssistNotNotAvail‐Avail‐able When Towing a Trailer See Opera‐able When Towing a Trailer See Opera‐tor's Manualtor's Manualmessage appears in the multi-function display.
Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in front ofyour vehicle by means of multifunction cam-eraCwhich is attached behind the top of thewindshield. Lane Keeping Assist detects lanemarkings on the road and can warn you beforeyou leave your lane unintentionally.
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the lines on the assistance graphic display areshown in green (Ypage 219). Active LaneKeeping Assist is ready for use.
XTo deactivate:press buttonD.Indicator lampCgoes out. The Active LaneKeeping Assist is deactivated. TheLaneLaneKeeping Assist OffKeeping Assist Offmessage appears inthe multifunction display.
Selecting Standard or Adaptive setting
XIn theDriveAssistDriveAssistmenu on the on-boardcomputer, select theActive Lane Keep‐Active Lane Keep‐ing Assisting Assistfunction (Ypage 221).
XSelect settingStandardStandardorAdaptiveAdaptive.WhenStandardStandardis selected, no warning vibra-tion occurs if:
Ryou switch on the turn signals. In this event,the warnings are suppressed for a certainperiod of time.
Ra driving safety system intervenes, such as
ABS, BAS or ESP®.
WhenAdaptiveAdaptiveis selected, no warning vibra-tion occurs if:
Ryou switch on the turn signals. In this event,the warnings are suppressed for a certainperiod of time.
Ra driving safety system intervenes, e.g.
ABS, BAS or ESP®.
Ryou accelerate hard, e.g. kickdown.
Ryou brake hard.
Ryou steer actively, e.g. swerve to avoid anobstacle or change lanes quickly.
Ryou cut the corner on a sharp bend.
To ensure that you are warned only when nec-essary and in good time if you cross the lanemarkings, the system detects certain conditionsand warns you accordingly.
The warning vibration occurs earlier if:
Ryou approach the outer lane marking on abend
Rthe road has very wide lanes, e.g. a freeway
Rthe system detects solid lane markings
The warning vibration occurs later if:
Rthe road has narrow lanes
Ryou cut the corner on a bend
Towing a trailer
When you attach a trailer, make sure you havecorrectly established the electrical connection.
This can be accomplished by checking the trailerlighting.
Towing a trailer
Important safety notes
GWARNING
Installing an unsuitable ball coupling may
result in overloading of the trailer tow hitch
and the rear axle. This applies especially if the
ball coupling in question is longer or angled
differently. This could seriously impair the
driving characteristics and the trailer can
come loose. There is a risk of an accident.
You should only ever install a ball coupling
that has the permissible dimensions and that
is designed to meet your trailer-towing
requirements. Do not modify the ball coupling
or the trailer tow hitch.
You will find the values approved by the manu-facturer on the vehicle identification plates andthose for the towing vehicle under "Technicaldata" (Ypage 364).
GWARNING
When the vehicle/trailer combination begins
to lurch, you could lose control of it. The vehi-
cle/trailer combination could even rollover.
There is a risk of an accident.
On no account should you attempt to
straighten up the vehicle/trailer combination
by increasing the speed. Reduce vehicle
speed and do not countersteer. Apply the
brake as necessary.
!If you have a trailer tow hitch retrofitted,changes to the engine cooling system may benecessary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,observe the anchorage points on the chassisframe.
The installation of a trailer tow hitch is only per-missible if a towing weight is specified in yourvehicle documents. If this is not the case, thenthe vehicle is not approved for the towing of atrailer.
202Towing a trailer
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