automatic transmission MERCEDES-BENZ GLC 2019 Service Manual

When overtaking, pay particular attention to theextended length of your vehicle/trailer combi-nation.
Due to the length of the vehicle/trailer combi-nation, you require additional road space whenovertaking before you can change back to theoriginal lane.
If the automatic transmission repeatedly shiftsbetween gears on uphill or downhill gradients,shift to a lower gear.
Driving in a lower gear and at a reduced speeddecreases the risk of engine damage.
If the coolant temperature increases signifi-cantly when climate control is switched on,switch climate control off.
Coolant heat can also be dissipated by openingthe windows and switching the ventilationblower and the interior temperature to the high-est level.
Decoupling a trailer
GWARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
GWARNING
Vehicles with level control:
The vehicle is lowered as soon as you discon-
nect the trailer cable. This could result in your
limbs or those of other people that are
between the vehicle body and tires or under-
neath the vehicle being trapped. There is a
risk of injury.
Make sure that nobody is in the immediate
vicinity of the wheel housings or under the
vehicle when you disconnect the trailer cable.
!Do not disconnect a trailer with an engagedoverrun brake. Otherwise, your vehicle couldbe damaged by the rebounding of the overrunbrake.
XApply the vehicle's parking brake manually.
XShift the transmission to position].
XClose all doors and the tailgate.
XSwitch off the engine.
XSecure the vehicle and trailer against rollingaway.
XRemove the trailer cable.
XRemove the safety chains, if there are any.
XUncouple the trailer.
Removing the ball coupling
XObserve the manufacturer's installationinstructions.
XPress the protective cap into the ball couplingrecess.
XMake sure that the protective cap is firmly inplace.
Observe the loading guidelines (Ypage 278)and the safety notes regarding stowage spaces(Ypage 278).
Information on cleaning and care of the trailertow hitch (Ypage 310).
Trailer power supply
!Accessories with a maximum power con-sumption of 180 W can be connected to thepermanent power supply.
You must not charge a trailer battery using thepower supply.
The trailer socket of your vehicle is equipped atthe factory with a permanent power supply.
The permanent power supply is supplied viatrailer socket pin 4.
The trailer's permanent power supply isswitched off in the event of low vehicle supplyvoltage and after six hours at the latest.
A qualified specialist workshop can providemore information about installing the trailerelectrics.
Permissible trailer loads and trailer
drawbar noseweights
Weight specifications
The gross trailer weight is calculated as theweight of the trailer plus the weight of the loadand the trailer's equipment.
206Towing a trailer
Driving and parking

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp and the redI(USA only) or$(Canada only) indicator lamp light up.
The electric parking brake is malfunctioning.
To release:
XSwitch off the ignition and turn it back on.
XRelease the electric parking brake manually.
or
XRelease the electric parking brake automatically (Ypage 155).
If the electric parking brake still cannot be released:
XDo not drive on.
XConsult a qualified specialist workshop.
The redI(USA only) or$(Canada only) indicator lamp flashesand the yellow$warning lamp lights up.
The electric parking brake is malfunctioning.
To release:
XSwitch off the ignition and turn it back on.
XRelease the electric parking brake manually.
To apply:
XSwitch off the ignition and turn it back on.
XApply the electric parking brake manually.
If the redI(USA only) or$(Canada only) indicator lamp con-tinues to flash:
XDo not drive on.
XSecure the vehicle against rolling away (Ypage 351).
XShift the transmission to position].
XTurn the front wheels towards the curb.
XConsult a qualified specialist workshop.
Displaymessages231
On-b oard computer and displays
Z

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
Tire Pressure Moni‐Tire Pressure Moni‐tor Inoperative Notor Inoperative NoWheel SensorsWheel Sensors
The wheels mounted do not have a suitable tire pressure sensor. Thetire pressure monitor is deactivated.
XMount wheels with suitable tire pressure sensors.The tire pressure monitor is activated automatically after driving fora few minutes.
TireTirePress.Press.MonitorMonitorInoperativeInoperativeThe tire pressure monitor is faulty.
XVisit a qualified specialist workshop.
Tires OverheatedTires OverheatedThe tire temperature monitoring function is not available in all vehi-cles.
At least one tire has overheated. Affected tires are shown in red. Attemperatures close to the limit value, the tires are shown in yellow.
XDrive more slowly.
Tires OverheatedTires OverheatedDecrease SpeedDecrease SpeedThe tire temperature monitoring function is not available in all vehi-cles.
At least one tire has overheated.
GWARNING
Overheated tires can burst, particularly at high speeds.
XDrive more slowly so that the tires cool down.
Vehicle
Display messagesPossible causes/consequences andPPSolutions
ShiftShifttoto'P''P'oror'N''N'to Start Engineto Start EngineYou have attempted to start the engine with the transmission in posi-tion^or[.
XShift the transmission to position]or\\.
Apply Brake toApply Brake toShift from 'P'Shift from 'P'You have attempted to shift the transmission to position[,^or\\without depressing the brake pedal.
XDepress the brake pedal.
ToToDeselectDeselectPPororN,N,Depress Brake andDepress Brake andStart EngineStart Engine
With the engine switched off, you have attempted to shift the trans-mission out of position]or\\into another transmission position.
XDepress the brake pedal.
XStart the engine.
To Engage Trans‐To Engage Trans‐miss. Position Rmiss. Position RFirst Depress theFirst Depress theBrakeBrake
You have attempted to shift from position[to position^.
XDepress the brake pedal.
XShift the transmission to position^.
252Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
Driver's Door OpenDriver's Door Open& Transmission Not& Transmission Notin P Risk of Vehi‐in P Risk of Vehi‐cle Rolling Awaycle Rolling Away
The driver's door is open or not fully closed and the transmission is inposition^,\\or[.
A warning tone also sounds.
GWARNING
The vehicle may roll away.
There is a risk of an accident.
XShift the transmission to position].
XSecure the vehicle against rolling away (Ypage 152).
XClose the driver's door completely.
Only Shift to 'P'Only Shift to 'P'whenwhenVehicleVehicleisisSta‐Sta‐tionarytionary
The vehicle is moving.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XShift the transmission to position].
ServiceServiceRequiredRequiredDoDoNot Shift GearsNot Shift GearsVisit DealerVisit Dealer
You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position[is selected:
XDrive to a qualified specialist workshop without shifting the trans-mission from position[.
If transmission position^,\\or]is selected:
XSecure the vehicle against rolling away (Ypage 152).
XNotify a qualified specialist workshop or breakdown service.
ReversingReversingNotNotPossi‐Possi‐blebleServiceServiceRequiredRequiredYou cannot shift into transmission position^due to a malfunction.
The transmission positions],\\or[continue to be available.
A warning tone also sounds.
XVisit a qualified specialist workshop.
Transmission Mal‐Transmission Mal‐function Stopfunction StopA malfunction has occurred in the mechanical transmission compo-nents.
A warning tone also sounds. The transmission automatically shifts toposition\\.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XShift the transmission to position].
XSecure the vehicle against rolling away (Ypage 152).
XNotify a qualified specialist workshop or breakdown service.
Displaymessages253
On-b oard computer and displays
Z

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
%QThe yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribution)is malfunctioning.
Other driving systems and driving safety systems may also malfunction.
GWARNING
The brake system continues to function normally, but without the functions listedabove. The front and rear wheels could therefore lock if you brake hard, for exam-ple.
The steerability and braking characteristics may be severely affected. The brakingdistance in an emergency braking situation can increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is defective, there is also a possibility that other systems,such as the navigation system or the automatic transmission, will not be available.
'M

Do not remove the SmartKey from the igni-tion lock. Do not open the driver's doorwhen the engine is switched off or at verylow speeds. Otherwise, when in transmis-sion position[or^, the automatictransmission will automatically switch topark position]and block the wheels.
ROperating with the Start/Stop button:
Do not open the driver's door when theengine is switched off or at very lowspeeds. Otherwise, when in transmissionposition[or^, the automatic transmis-sion will automatically switch to park posi-tion]and block the wheels.
Observe the following to make sure that theautomatic transmission stays in neutral\\:
Operating with the SmartKey and Start/Stopbutton:
XMake sure that the ignition is switched on.
XMake sure that the vehicle is stationary.
XDepress and hold the brake pedal.
Operating with the Start/Stop button only:
XEngage park position].
XRelease the brake pedal.
XRemove the Start/Stop button from ignitionlock (Ypage 132).
XInsert the SmartKey into the ignition lock.
XSwitch on the ignition.
XDepress and hold the brake pedal.
Operating with the SmartKey and Start/Stopbutton:
XShift to neutral\\.
XRelease the brake pedal.
XRelease the electric parking brake, if neces-sary.
XSwitch off the ignition and leave the SmartKeyin the ignition lock.
You can wash the vehicle in an automatic carwash from the very start.
If the vehicle is very dirty, pre-wash it beforecleaning it in an automatic car wash.
After using an automatic car wash, wipe off waxfrom the windshield and the wiper blades. Thiswill prevent smears and reduce wiping noisescaused by residue on the windshield.
Washing by hand
In some countries, washing by hand is onlyallowed at specially equipped washing bays.Observe the legal requirements in each country.
XDo not use hot water and do not wash thevehicle in direct sunlight.
XUse a soft sponge to clean.
XUse a mild cleaning agent, such as a carshampoo approved by Mercedes-Benz.
XThoroughly hose down the vehicle with a gen-tle jet of water.
XDo not point the water jet directly towards theair inlet.
XUse plenty of water and rinse out the spongefrequently.
XRinse the vehicle with clean water and drythoroughly with a chamois.
XDo not let the cleaning agent dry on the paint-work.
Carefully remove all deposits of road salt assoon as possible when driving in winter.
Power washers
GWARNING
The water jet from a circular jet nozzle (dirt
blasters) can cause invisible exterior damage
to the tires or chassis components. Compo-
nents damaged in this way may fail unexpect-
edly. There is a risk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged
tires or chassis components replaced imme-
diately.
!Always maintain a distance of at least 12 in(30 cm) between the vehicle and the powerwasher nozzle. Information about the correctdistance is available from the equipmentmanufacturer.
Move the power washer nozzle around whencleaning your vehicle.
Do not aim directly at any of the following:
RTires
RDoor gaps, roof gaps, joints, etc.
RElectrical components
RBattery
RPlug-type couplings
306Care
Maintenance and care

!Only secure the tow rope or tow bar at thetowing eyes, or the trailer tow hitch, if availa-ble. You could otherwise damage the vehicle.
!Do not use the trailer tow hitch for recoveryor towing. Do not use the towing eye forrecovery. this could damage the vehicle. If indoubt, have the vehicle recovered using acrane.
!When towing, pull away slowly andsmoothly. If the tractive power is too high, thevehicles could be damaged.
!Shift the automatic transmission to position\\and do not open the driver's or front pas-senger's door during towing. The automatictransmission may otherwise shift to position], which could damage the transmission.
!Do not tow with sling-type equipment. Thiscould damage the vehicle.
!You may tow the vehicle for a maximum dis-tance of 30 miles (50 kilometers). A towingspeed of 30 mph (50 km/h) must not beexceeded.
For towing distances over 30 miles(50 kilometers), the entire vehicle must beraised and transported.
It is better to have the vehicle transported thanto have it towed away.
If the vehicle has suffered transmission damage,have it transported on a transporter or trailer.
The automatic transmission must be in position\\when the vehicle is being towed. If the auto-matic transmission cannot be shifted to position\\, have the vehicle transported on a trans-porter or trailer.
The battery must be connected and charged.Otherwise, you:
Rcannot turn the SmartKey to positionHinthe ignition lock
Rcannot release the electric parking brake.
Rcannot shift the automatic transmission toposition\\
Disarm the automatic locking feature before thevehicle is towed (Ypage 84). You could other-wise be locked out when pushing or towing thevehicle.
Installing/removing the towing eye
Installing the towing eye
GWARNING
The exhaust tail pipe may be very hot. There is
a risk of burns when removing the rear cover.
Do not touch the exhaust pipe. Take particular
care when removing the rear cover.
Mercedes-AMG vehicles
All other vehicles
The brackets for the screw-in towing eye arelocated in the bumpers. They are at the rear andat the front, under coversC.
Towing and tow-starting325
Breakdown assistance
Z

XRemove the towing eye from the retainer(Ypage 314).
XMercedes-AMG vehicles:use a suitableobject, e.g. a screwdriver, to pry off coverCon the front bumper from underneath. Takethe cover from the opening, but do notremove it.
Press the mark on coverCon the rearbumper inward and remove.
XAll other vehicles:press the mark oncoverCinward and remove.
XScrew in the towing eye clockwise as far as itwill go and tighten it.
Vehicles with a trailer tow hitch do not have abracket for the screw-in towing eye at the back.Connect the towbar to the trailer tow hitch(Ypage 204).
Removing the towing eye
XUnscrew and remove the towing eye.
XAttach coverCto the bumper and press untilit engages.
Towing a vehicle with both axles on
the ground
The automatic transmission automatically shiftsto position]when you open the driver's orfront-passenger door or when you remove theSmartKey from the ignition lock. It is essential toobserve the following steps to ensure that theautomatic transmission remains in position\\during towing.
XMake sure that the vehicle is stationary.
XTurn the SmartKey to positionHin the igni-tion lock.
XDepress and hold the brake pedal.
XShift the automatic transmission to position\\.
XLeave the SmartKey in positionHin the igni-tion lock.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch on the hazard warning lamps(Ypage 111).
In order to signal a change of direction whentowing the vehicle with the hazard warninglamps switched on, use the combination switchas usual. In this case, only the indicator lamps
for the direction of travel flash. After resettingthe combination switch, the hazard warninglamp starts flashing again.
Transporting the vehicle
General notes
!When the vehicle is loaded for transport, thefront and rear axles must be stationary and onthe same transportation vehicle. Positioningover the connection point of the transportvehicle is not permitted. The drive train mayotherwise be damaged.
!You may only secure the vehicle by thewheels, not by parts of the vehicle such asaxle or steering components. Otherwise, thevehicle could be damaged.
The towing eye or trailer tow hitch can be usedto pull the vehicle onto a trailer or transporter ifyou wish to transport it.
XTurn the SmartKey to positionHin the igni-tion lock.
XShift the automatic transmission to position\\.
As soon as the vehicle has been loaded:
XPrevent the vehicle from rolling away byapplying the electric parking brake.
XShift the automatic transmission to position].
XTurn the SmartKey to positionZin the igni-tion lock and remove it.
XSecure the vehicle.
326Towing and tow-starting
Breakdown assistance

Notes on 4MATIC vehicles
!Vehicles with 4MATIC must not be towedwith either the front or the rear axle raised, asdoing so will damage the transmission.
Vehicles with 4MATIC may either be towed awaywith both axles on the ground or be loaded upand transported.
If the vehicle's transmission, front, or rear axle isdamaged, have the vehicle transported on atruck or trailer.
In the event of damage to the electrical sys-tem:if the battery is defective, the automatictransmission will be locked in positionP. To shiftthe automatic transmission to positionN, youmust provide power to the vehicle's electricalsystem in the same way as when jump-starting(Ypage 322).
Have the vehicle transported on a transporter ortrailer.
Tow-starting (emergency engine
starting)
!Vehicles with automatic transmission mustnot be tow-started. You could otherwise dam-age the automatic transmission.
iYou can find information on "Jump-starting"under (Ypage 322).
Fuses
Important safety notes
GWARNING
If you manipulate or bridge a faulty fuse or if
you replace it with a fuse with a higher amper-
age, the electric cables could be overloaded.
This could result in a fire. There is a risk of an
accident and injury.
Always replace faulty fuses with the specified
new fuses having the correct amperage.
Blown fuses must be replaced with fuses of thesame rating, which you can recognize by thecolor and value. The fuse ratings are listed in thefuse allocation chart.
The fuse allocation chart is on the fuse box in thecargo compartment (Ypage 328).
If a newly inserted fuse also blows, have thecause traced and rectified at a qualified special-ist workshop, e.g. an authorized Mercedes-BenzCenter.
!Only use fuses that have been approved forMercedes-Benz vehicles and which have thecorrect fuse rating for the system concerned.Otherwise, components or systems could bedamaged.
!Make sure that no moisture can enter thefuse box when the cover is open.
!When closing the cover, make sure that it islying correctly on the fuse box. Moisture seep-ing in or dirt could otherwise impair the oper-ation of the fuses.
The fuses in your vehicle serve to close downfaulty circuits. If a fuse blows, all the compo-nents on the circuit and their functions stopoperating.
Before changing a fuse
Observe the important safety notes(Ypage 327)
XSwitch off the engine.
XSwitch off all electrical consumers.
XMake sure that the ignition is switched off(Ypage 132).
or
XWhen using the SmartKey, turn the SmartKeyto position