ECU MERCEDES-BENZ GLA 2019 Owner's Guide

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.
The function of the electric parking brake isdependent on the on-board voltage. If the on-board voltage is low or there is a malfunctionin the system, it may not be possible to applythe released parking brake.
XIf this is the case, only park the vehicle onlevel ground and secure it to prevent it roll-ing away.
XShift the automatic transmission to position].
It may not be possible to release an appliedparking brake if the on-board voltage is low orthere is a malfunction in the system. Contact aqualified specialist workshop.
The electric parking brake performs a functiontest at regular intervals while the engine isswitched off. The sounds that can be heardwhile this is occurring are normal.
Applying or releasing manually
XTo apply:push handleC.When the electric parking brake is applied,the redI(USA only) or$(Canadaonly) indicator lamp lights up in the instru-ment cluster.
The electric parking brake can also beapplied when the SmartKey is removed.
XTo release:pull handleC.The redI(USA only) or$(Canadaonly) indicator lamp in the instrument clus-ter goes out.
The electric parking brake can only bereleased:
Rif the SmartKey is in positionGorHinthe ignition lock (Ypage 125) or
Rif the ignition was switched on using theStart/Stop button
Applying automatically
The electric parking brake is automaticallyapplied when the transmission is in position]and:
Rthe engine is switched off or
Rthe driver is not wearing a seat belt and thedriver's door is opened
To prevent the electric parking brake frombeing automatically applied, pull handleC.
The electric parking brake is also applied auto-matically if:
RActive Distance Assist DISTRONIC bringsthe vehicle to a standstill or
RThe HOLD function is keeping the vehiclestationary
RActive Parking Assist is keeping the vehiclestationary
In addition, at least one of the following condi-tions must be fulfilled:
RThe engine is switched off
RThe driver is not wearing a seat belt and thedriver's door is opened
RThere is a system malfunction
RThe power supply is insufficient
RThe vehicle is stationary for a long period oftime
The redI(USA only) or$(Canadaonly) indicator lamp in the instrument clustergoes out.
Parking147
Driving an d parking
Z

GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact
with hot parts of the exhaust system. There
is a risk of fire.
When driving on an unpaved road or off-
road, check the vehicle underside regularly.
In particular, remove trapped plant parts or
other flammable material. Contact a quali-
fied specialist workshop immediately if dam-
age is detected.
!There is a risk of damage to the vehicle if:
Rthe vehicle becomes stuck, e.g. on a highcurb or an unpaved road
Ryou drive too fast over an obstacle, e.g. acurb, a speed bump or a pothole in theroad
Ra heavy object strikes the underbody orparts of the chassis
In situations like this, the body, the under-body, chassis parts, wheels or tires could bedamaged without the damage being visible.Components damaged in this way can unex-pectedly fail or, in the case of an accident,no longer withstand the loads they aredesigned to.
If the underbody paneling is damaged, com-bustible materials such as leaves, grass ortwigs can gather between the underbodyand the underbody paneling. If these materi-als come in contact with hot parts of theexhaust system, they can catch fire.
In such situations, have the vehicle checkedand repaired immediately at a qualified spe-cialist workshop. If on continuing your jour-ney you notice that driving safety isimpaired, pull over and stop the vehicleimmediately, paying attention to road andtraffic conditions. In such cases, consult aqualified specialist workshop.
The vehicle is only designed for easily negotia-ble off-road terrain and poor road surfaces.
When driving off-road, substances such assand, mud and water or water mixed with oilmay get into the brakes. This could result in areduced braking effect or in total brake failureand also in increased wear and tear. The brak-ing characteristics change depending on thematerial entering the brakes. Clean the brakesafter driving off-road. If you detect a reduced
braking effect or grinding noises, have thebrake system checked in a qualified specialistworkshop as soon as possible. Adapt yourdriving style to the different braking character-istics.
Driving off-road increases the likelihood ofdamage to the vehicle, which, in turn, can leadto failure of the mechanical assembly or sys-tems. Adapt your driving style to suit the ter-rain conditions. Drive carefully. Have damageto the vehicle rectified immediately at a quali-fied specialist workshop.
Do not shift into transmission position\\when driving off-road. You could lose controlof the vehicle if you attempt to brake the vehi-cle using the service brake. If the gradient istoo steep for your vehicle, drive back down inreverse gear.
General notes
HEnvironmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Read this section carefully before driving yourvehicle off-road.
Off-road driving is only possible with theON&OFFROAD package.
The following driving systems are speciallyadapted for driving over easily negotiable off-road terrain:
ROff-road program (Ypage 170)
ROff-road ABS (Ypage 60)
ROff-road 4ETS (Ypage 64)
ROff-road ESP®(Ypage 66)
RDSR (Downhill Speed Regulation)(Ypage 169)
Observe the following notes:
RStop the vehicle before starting to drivealong an off-road route. If necessary, acti-vate the off-road program (Ypage 132).
RTo avoid damaging the vehicle, make surethere is always sufficient ground clearance.
RCheck that items of luggage and loads arestowed safely and are well secured(Ypage 255).
RAlways keep the engine running and in gearwhen driving on a downhill gradient. Acti-vate DSR (Ypage 169).
154Driving tips
Driving and parking

Selecting the drive program
Active Distance Assist DISTRONIC supports asporty driving style when you select theS+drive program (Ypage 138) or the manualdrive program (Ypage 140). Accelerationbehind the vehicle in front or to the set speedis then noticeably more dynamic. If you haveselected theE(Mercedes-AMG vehicles:C)drive program, the vehicle accelerates moregently. This setting is recommended in stop-and-start traffic.
Changing lanes
If you want to change to the overtaking laneon multi-lane roads, Active Distance AssistDISTRONIC supports you if:
Ryou are driving faster than 45 mph(70 km/h)
RActive Distance Assist DISTRONIC is main-taining the distance to a vehicle in front
Ryou switch on the appropriate turn signal
RActive Distance Assist DISTRONIC does notcurrently detect a danger of collision
If these conditions are fulfilled, your vehicle isaccelerated. Acceleration will be interrupted ifchanging lanes takes too long or if the dis-tance between your vehicle and the vehicle infront becomes too small.
Stopping
If Active Distance Assist DISTRONIC detectsthat the vehicle in front is stopping, it brakesyour vehicle until it is stationary.
Once your vehicle is stationary, it remains sta-tionary and you do not need to depress thebrake.
iAfter a time, the electric parking brakesecures the vehicle and relieves the servicebrake.
iDepending on the specified minimum dis-tance, your vehicle will come to a standstillat a sufficient distance behind the vehicle infront. The specified minimum distance is setusing the control on the cruise control lever.
When Active Distance Assist DISTRONIC isactivated, the transmission is shifted automati-cally to position]if:
Rthe driver's seat belt is not fastened and thedriver's door is open.
Rthe engine is switched off, unless it is auto-matically switched off by the ECO start/stop function.
The electric parking brake is applied automati-cally if Active Distance Assist DISTRONIC isactive when the vehicle is stationary and:
Ra system malfunction occurs.
Rthe power supply is insufficient.
If a malfunction occurs, the transmission mayalso shift to position]automatically.
Setting a speed
Keep in mind that it may take a brief momentuntil the vehicle has accelerated or braked tothe speed set.
XPress the cruise control lever upCfor ahigher speed or downDfor a lower speed.
XTo adjust the set speed in 1 mph incre-ments (1 km/h increments):briefly pushthe cruise control lever upCor downDtothe pressure point.The last stored speed increases or decrea-ses in 1 mph (1 km/h) increments.
XTo adjust the set speed in 5 mph incre-ments (10 km/h increments):briefly pushthe cruise control lever upCor downDbeyond the pressure point.The last stored speed increases or decrea-ses in 5 mph (10 km/h) increments.
iActive Distance Assist DISTRONIC is notdeactivated if you depress the acceleratorpedal. If you accelerate to overtake, ActiveDistance Assist DISTRONIC adjusts the vehi-cle's speed to the last speed stored, afteryou have finished overtaking.
Setting a specified minimum distance
You can set the specified minimum distancefor Active Distance Assist DISTRONIC by vary-ing the time span between one and two sec-onds. This determines the distance that ActiveDistance Assist DISTRONIC is to maintain fromthe vehicle in front, depending on the roadspeed. You can see this distance in the multi-function display (Ypage 164).
162Driving systems
Driving and parking

in front on the edge of the road because ofits narrow width. The distance to the vehiclein front will be too short.
RObstacles and stationary vehicles: ActiveDistance Assist DISTRONIC does not brakefor obstacles or stationary vehicles. If, forexample, the detected vehicle turns a cor-ner and an obstacle or stationary vehicle isrevealed, Active Distance Assist DISTRONICwill not brake for them.
RActive Distance Assist DISTRONIC may mis-takenly detect vehicles that are crossingyour lane. If you activate Active DistanceAssist DISTRONIC under the following condi-tions, the vehicle could pull away uninten-tionally:
-at traffic lights with crossing traffic, forexample
-if there is a vehicle in front, after a cross-ing, with the HOLD function activated
In such situations, brake if necessary. ActiveDistance Assist DISTRONIC will then be deacti-vated.
HOLD function
General notes
The HOLD function can assist the driver in thefollowing situations:
RWhen pulling away, especially on steepslopes
RWhen maneuvering on steep slopes
RWhen waiting in traffic
The vehicle is kept stationary without thedriver having to depress the brake pedal.
The braking effect is canceled and the HOLDfunction deactivated when you depress theaccelerator pedal to pull away.
Important safety notes
GWARNING
If the vehicle is only braked using the HOLD
function, the vehicle may roll away in the fol-
lowing situations when you leave the vehi-
cle:
Rif there is a malfunction in the system or
in the voltage supply
Rif the HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant
There is a risk of an accident.
Always deactivate the HOLD function and
secure the vehicle against rolling away
before you leave it.
!When Active Distance Assist DISTRONICor the HOLD function is activated, the vehi-cle brakes automatically in certain situa-tions.
To avoid damage to the vehicle, deactivateActive Distance Assist DISTRONIC and theHOLD function in the following or similar sit-uations:
Rwhen towing the vehicle
Rin the car wash
Deactivate the HOLD function (Ypage 166).
Activation conditions
You can activate the HOLD function if:
Rthe vehicle is stationary
Rthe engine is running or if it has been auto-matically switched off by the ECO start/stop function
Rthe driver's door is closed or your seat beltis fastened
Rthe electric parking brake is released
RActive Distance Assist DISTRONIC is deacti-vated
Rthe transmission is in position[,^or\\on vehicles with automatic transmission
Driving systems165
Driving and parking
Z

Activating the HOLD function
XMake sure that the activation conditions aremet.
XDepress the brake pedal.
XQuickly depress the brake pedal furtheruntilCappears in the multifunction dis-play.The HOLD function is activated. You canrelease the brake pedal.
iIf depressing the brake pedal the first timedoes not activate the HOLD function, waitbriefly and then try again.
Deactivating the HOLD function
The HOLD function is deactivated automati-cally if:
Ryou accelerate. On vehicles with automatictransmission: only when the transmission isin position[or^.
Rthe transmission is in position]on vehi-cles with automatic transmission.
Ryou depress the brake pedal again with acertain amount of pressure untilCdisap-pears from the multifunction display.
Ryou activate Active Distance AssistDISTRONIC.
Ryou secure the vehicle using the electricparking brake.
iAfter a time, the electric parking brakesecures the vehicle and relieves the servicebrake.
When the HOLD function is activated, thetransmission is automatically shifted to posi-tion]if:
Rthe driver's seat belt is not fastened and thedriver's door is open
Rthe engine is switched off, unless it is auto-matically switched off by the ECO start/stop function
The electric parking brake secures the vehicleautomatically if the HOLD function is activatedwhen the vehicle is stationary and:
Ra system malfunction occurs
Rthe power supply is insufficient
Start-off Assist (except Mercedes-
AMG vehicles)
Important safety notes
GWARNING
If you use start-off assist, individual wheels
may start to spin and the vehicle may skid. If
ESP®is deactivated, there is a greater dan-
ger of skidding and having an accident.
Make sure that no persons or obstacles are
in the vicinity of the vehicle.
Start-off assist enables optimum accelerationfrom a standstill. For this, a suitably high-griproad surface is required and the vehicle andtires must be in good working order.
Do not activate start-off assist on public roads.
Observe the safety notes on driving safety sys-tems (Ypage 60).
Be sure to read the safety notes and informa-
tion on ESP®(Ypage 63).
Activating start-off assist
XDeactivate ESP®(Ypage 197).
XTurn the steering wheel to the straight-ahead position.
XFirmly depress the brake pedal with your leftfoot and keep it depressed.
XShift the transmission to position[.
XUse the DYNAMIC SELECT button to selecttheSdrive program (Ypage 132).
XQuickly depress the accelerator pedal fully.
XTake your foot off the brake, but keep theaccelerator pedal depressed.The vehicle pulls away at maximum acceler-ation.
iActivate ESP®as soon as the acceleration
process has ended. ESP®will otherwise notbe able to stabilize the vehicle if the vehiclestarts to skid or a wheel starts to spin.
166Driving systems
Driving and pa rking

Rthat are parallel to the direction of traveland at least 39.5 in (1.0m) longer than yourvehicle
Rat right angles to the direction of travel andat least 39.5 in (1.0m) widerthan your vehi-cle
When driving at speeds below 19 mph(30 km/h), you will see parking symbolDasa status indicator in the instrument cluster.When a parking space has been detected, anarrow towards the right or the left alsoappears. By default, Active Parking Assist onlydisplays parking spaces on the front-passenger side. Parking spaces on the driver'sside are displayed as soon as the turn signalon the driver's side is activated. When parkingon the driver's side, this must remain activateduntil you confirm the use of Active ParkingAssist by pressing thevbutton on the mul-tifunction steering wheel. The system automat-ically determines whether the parking space isparallel or at right-angles to the direction oftravel.
A parking space is displayed while you aredriving past it, and until you are approximately50 ft (15m) away from it.
Parking
GWARNING
If you leave the driver's seat when the vehi-
cle is only being braked by the Parking Pack-
age with rear view camera, it could roll
away:
Rif there is a malfunction in the system or
in the voltage supply
Rif the electrical system in the engine com-
partment, the battery or the fuses are
tampered with
Rif the battery is disconnected
Rif the vehicle is accelerated, e.g. by a vehi-
cle occupant
There is a risk of an accident.
Before leaving the vehicle, always secure it
against rolling away.
iIf Active Parking Assist detects obstacles,Active Parking Assist brakes automaticallywhile the vehicle is parking. You are respon-sible for braking in good time.
XStop the vehicle when the parking spacesymbol shows the desired parking space inthe instrument cluster.
XShift the transmission to position^.TheStart Parking Assist?Start Parking Assist?Yes: OKYes: OKNo:No:8message appears on the multifunctiondisplay.
XTo cancel the procedure:press the8button on the multifunction steering wheelor pull away.
or
XTo park using Active Parking Assist:press thevbutton on the multifunctionsteering wheel.TheParking Assist Active Acceler‐Parking Assist Active Acceler‐ate and Brakeate and BrakeObserve SurroundingsObserve Surroundingsmessage appears on the multifunction dis-play.
XLet go of the multifunction steering wheel.
XBack up the vehicle, being ready to brake atall times. When backing up, drive at a speedbelow approximately 6 mph (10 km/h). Oth-erwise, Active Parking Assist will be can-celed.Active Parking Assist brakes the vehicle to astandstill when the vehicle approaches therear border of the parking space.
Maneuvering may be required in tight park-ing spaces.
TheParking Assist Active SelectParking Assist Active SelectDObserve SurroundingsDObserve Surroundingsmessage appearson the multifunction display.
XShift the transmission to position[whilethe vehicle is stationary.Active Parking Assist immediately steers inthe other direction.
TheParking Assist Active Acceler‐Parking Assist Active Acceler‐ate and Brakeate and BrakeObserve SurroundingsObserve Surroundingsmessage appears on the multifunction dis-play.
iYou will achieve the best results by waitingfor the steering procedure to completebefore pulling away.
XDrive forwards and be ready to brake at alltimes.Active Parking Assist brakes the vehicle to astandstill when the vehicle approaches thefront border of the parking space.
Maneuvering may be required in tight park-ing spaces.
176Driving systems
Driving an d parking

XSwitch on the multimedia system and selectradio (see the Digital Operator's Manual).
XPress theYorebutton on the steer-ing wheel to select theAudioAudiomenu.
XTo select a preset list or station list:press and briefly hold thecordbut-ton until the preset list or station list in thedesired frequency range is shown.
XTo select a station:briefly presscord.
iSIRIUS XM satellite radio functions like anormal radio.
You can find further information on opera-tion in the "Satellite radio" section of theDigital Operator's Manual for the multimediasystem.
Operating an audio player or audio
media
CCurrent title
Audio data from various audio devices ormedia can be played, depending on the equip-ment installed in the vehicle.
XSwitch on the multimedia system andswitch on CD or MP3 mode (see the DigitalOperator's Manual).
XPress theYorebutton on the steer-ing wheel to select theAudioAudiomenu.
XTo select the next/previous track:brieflypress thecordbutton.
XTo select a track from the track list(rapid scrolling):press and hold thecordbutton until desired track appears.
If you press and holdcord, therapid scrolling speed is increased. Not allaudio drives or data carriers support thisfunction.
If track information is stored on the audiodevice or medium, the multifunction displaywill show the number and title of the track.
Video DVD operation
You can only operate DVD videos in theAudioAudiomenu in vehicles with COMAND.
XSwitch on COMAND and select DVD Video(see the Digital Operator's Manual).
XPress theYorebutton on the steer-ing wheel to select theAudioAudiomenu.
XTo select the next or previous scene:briefly press thecordbutton.
XTo select a scene from the scene list(rapid scrolling):press and hold thecordbutton until desired sceneCappears.
Telephone menu
Introduction
GWARNING
If you operate information systems and com-
munication equipment integrated in the
vehicle when driving, you may be distracted
from the traffic situation. You could also
lose control of the vehicle. There is a risk of
an accident.
Only operate this equipment when the traffic
situation permits. If you are not sure that
this is possible, park the vehicle paying
attention to traffic conditions and operate
the equipment when the vehicle is station-
ary.
When telephoning, you must observe the legalrequirements for the country in which you arecurrently driving.
XSwitch on the mobile phone (see the manu-facturer’s operating instructions).
XSwitch on the multimedia system (see theDigital Operator's Manual)
Menus and submenus195
On-board computer and displays
Z

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 146).
If the electric parking brake still cannot be released:
XDo not drive on.
XConsult a qualified specialist workshop.
The redI(USA only) or$(Canada only) indicator lampflashes and the yellow$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 lampcontinues to flash:
XDo not drive on.
XSecure the vehicle against rolling away (Ypage 326).
XShift the transmission to position].
XTurn the front wheels towards the curb.
XConsult a qualified specialist workshop.
Displaymessages207
On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp lights up and the redI(USAonly) or$(Canada only) indicator lamp flashes.
It is not possible to apply the electric parking brake manually.
XShift the transmission to position].
XVisit a qualified specialist workshop.
'(USA only)
M(Canada only)
Check Brake FluidCheck Brake FluidLevelLevel
There is not enough brake fluid in the brake fluid reservoir.
A warning tone sounds. The'(USA only) orM(Canada only)warning lamps in the instrument cluster may also light up.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions. Do not continue drivingunder any circumstances.
XSecure the vehicle against rolling away (Ypage 145).
XConsult a qualified specialist workshop.
XDo not add brake fluid. This does not correct the malfunction.
&
Check Brake PadCheck Brake PadWearWear
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
S
InoperativeInoperative
Malfunction of one or more main functions of the Mercedes me con-nect system.
XVisit a qualified specialist workshop.
Mercedes me con‐Mercedes me con‐nect Services Limi‐nect Services Limi‐ted See Operator'sted See Operator'sManualManual
Service limited.
Malfunction of one or more main functions of the Mercedes me con-nect system.
XObserve the notes on diagnostics connection (Ypage 27).
XVisit a qualified specialist workshop.
Displaymessages209
On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
Active BrakeActive BrakeAssist FunctionsAssist FunctionsCurrently LimitedCurrently LimitedSee Operator's Man‐See Operator's Man‐ualual
Active Brake Assist is temporarily inoperative.
Possible causes are:
Rthe radar sensor system is temporarily inoperative, e.g. due toelectromagnetic radiation emitted by nearby TV or radio stationsor other sources of electromagnetic radiation
Rthe system is outside the operating temperature range
Rthe on-board voltage is too low
When the causes stated above no longer apply, the display messagedisappears.
Active Brake Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 145).
XRestart the engine.
Active BrakeActive BrakeAssist: SystemAssist: SystemInoperativeInoperative
Active Brake Assist is unavailable due to a malfunction. Situation-dependent braking assistance may also have failed.
XVisit a qualified specialist workshop immediately.
Radar SensorsRadar SensorsDirty See Opera‐Dirty See Opera‐tor's Manualtor's Manual
The radar sensor system is malfunctioning.
Possible causes are:
Rdirt on sensors
Rheavy rain or snow
Rwhen driving on inter-urban roads without traffic or infrastructure,e.g. in desert-like areas
At least one driving system or driving safety system is malfunction-ing or is temporarily unavailable:
RActive Brake Assist
RActive Distance Assist DISTRONIC
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving anddrive safety systems will be available again. The display messagedisappears.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 145).
XSwitch off the engine.
XClean all sensors (Ypage 282).
XRestart the engine.The display message disappears.
210Displaymessages
On-b oard computer and displays