2019 MERCEDES-BENZ GLA warning lights

It is possible to make use of the residual heatof the engine to continue heating the vehiclefor approximately 30 minutes after the enginehas been switched off. The heating timedepends on the set interior temperature.
iThe blower will run at a low speed regard-less of the airflow setting.
iIf you activate the residual heat function athigh temperatures, only the ventilation willbe activated. The blower runs at mediumspeed.
iYou cannot use the ventilation to cool thevehicle interior to a temperature lower thanthe outside temperature.
Activating/deactivating
XTurn the SmartKey to positionZin the igni-tion lock or remove it (Ypage 125).
XPress theKbutton.The indicator lamp in theKbutton lightsup or goes out.
The indicator lamp in the button indicatesthat the respective function is activated.
iResidual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the
air vents. This could result in burns or frost-
bite in the immediate vicinity of the air
vents. There is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh airthrough the air vents into the vehicle interior,please observe the following notes:
Rkeep the air inlet between the windshieldand the hood free of blockages, such as ice,snow or leaves.
Rnever cover the air vents or air intake grillesin the vehicle interior.
iFor optimal climate control in the vehicle,open the air vents completely and set theadjusters to the central position.
Setting the air vents
CSide window defroster vent
DSide air vent
ISide air vent open
JSide air vent closed
XTo open a side air vent:turn the adjusterin side air ventDto the left in positionI.
XTo close a side air vent:turn the adjusterin side air ventDclockwise as far as it willgo to positionJ.
iThe center and rear air vents are adjustedin the same way.
Air vents123
Climate control
Z

The engine can be switched off while the vehi-cle is in motion by pressing and holding theStart/Stop button for three seconds. Thisfunction operates independently of the ECOstart/stop automatic engine switch-off func-tion.
Key positions with the Start/Stop button
CStart/Stop button
DIgnition lock
As soon as the ignition is switched on, all theindicator lamps in the instrument cluster lightup.
For further information on situations in whichan indicator lamp either fails to go out afterthe engine is started or lights up while driving,please refer to "Warning and indicator lamps inthe instrument cluster" (Ypage 232).
If Start/Stop buttonChas not yet beenpressed, this is the same as the SmartKeybeing removed from the ignition.
XTo switch on the power supply:pressStart/Stop buttonConce.The power supply is switched on. You cannow activate the windshield wipers, forexample.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop buttonCtwice whenin this position
XTo switch on the ignition:press Start/Stop buttonCtwice.The ignition is switched on.
If you press Start/Stop buttonConcewhen in this position, the ignition isswitched off again.
Removing the Start/Stop button
You can remove the Start/Stop button fromthe ignition lock and start the vehicle as nor-mal using the SmartKey.
You can only switch between Start/Stop but-ton mode and SmartKey operation when thevehicle is stationary.
You must also engage park position].
XRemove Start/Stop buttonCfrom ignitionlockD.
You do not have to remove the Start/Stop but-ton from the ignition lock when you leave thevehicle. You should, however, always take theSmartKey with you when leaving the vehicle.As long as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/Stop button
Rthe electrically powered equipment can beoperated
Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehi-
cle, they could:
Roperate the vehicle's equipment
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake
Rshift the automatic transmission out of
park position]
Rstart the engine
There is a risk of an accident and injury.
Never leave children or animals unattended
in the vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies for the Digital Vehicle Key if the
"Digital Vehicle Key" function is activated via
Mercedes me connect.
GDANGER
Combustion engines emit poisonous
exhaust gases such as carbon monoxide.
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Driving and parking

take advantage of engine braking. For thisyou must first activate manual gearshifting.This helps you to avoid overheating thebrakes and wearing them out excessively.
When you take advantage of engine braking,it is possible that a drive wheel will notrotate for some time, e.g. on a slippery roadsurface. This could cause damage to thedrive train. This type of damage is not cov-ered by the Mercedes-Benz warranty.
Briefly depressing the accelerator pedal ondownhill gradients while the manual drive pro-gramMis temporarily activated: the automatictransmission may switch to the last activeautomatic drive programEorS. The automatictransmission may shift to a higher gear. Thiscan reduce the engine's braking effect.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal
while driving, the braking system can over-
heat. 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.Drive on for a short while. This allows the air-flow to cool 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 vehi-cle washed, brake firmly while paying attentionto the traffic conditions. This will warm up the
brake 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, applythe brakes occasionally while paying atten-tion to the 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 engineis running
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 immedi-ately. Consult a qualified specialist work-shop to arrange this.
!A function or performance test should onlybe carried out on a 2-axle dynamometer. Ifyou wish to operate the vehicle on such adynamometer, please consult a qualifiedspecialist workshop in advance. You couldotherwise damage the drive train or thebrake system.
!As the ESP®system operates automati-cally, the engine and the ignition must beswitched off (the SmartKey must be in posi-tion

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

DSR
General notes
iDSR (Downhill Speed Regulation) is onlyavailable for vehicles with the ON&OFF-ROAD package.
DSR is an aid to assist you when driving down-hill. It keeps the speed of travel at the speedselected on the on-board computer. Thesteeper the downhill gradient, the greater theDSR braking effect on the vehicle. When driv-ing on flat stretches of road or on an uphillgradient, the DSR braking effect is minimal ornonexistent.
DSR controls the vehicle’s speed when it isactivated and the transmission is in position[,^or\\. You can drive at a higher or alower speed than that set on the on-boardcomputer at any time by accelerating or brak-ing.
Important safety notes
GWARNING
If the speed driven and the set speed devi-
ate and you activate DSR on a slippery road
surface, the wheels may lose traction. There
is an increased danger of skidding and acci-
dents.
Before switching DSR on, please take into
consideration the road surface and the dif-
ference between driving speed and the set
speed.
If you fail to adapt your driving style, DSR canneither reduce the risk of accident nor over-ride the laws of physics. DSR cannot takeaccount of road, weather and traffic condi-tions. DSR is only an aid. You are responsiblefor the distance to the vehicle in front, forvehicle speed, for braking in good time and forstaying in your lane.
You are always responsible for keeping controlof the vehicle and for assessing whether thedownhill gradient can be managed. DSR maynot always be able to keep to the set speed,depending on road surface and tire conditions.Select a set speed suitable for the prevailingconditions and when necessary, apply thebrakes manually.
Further information about "Driving off-road"(Ypage 153).
Activating/deactivating DSR
If you activate DSR and no speed has beenset, the vehicle decelerates to 4 mph (Canada:6 km/h).
You can only activate DSR when driving atspeeds below 19 mph (Canada: 30 km/h).
Activating DSR
XPress buttonC.Indicator lampDlights up.
The status indicator in the multifunction dis-play shows, e.g.DSR 6 km/hDSR 6 km/h.
If the current vehicle speed is too high, theDSR symbol appears on the multifunction dis-play. You will also see the message:Max.Max.Speed 30 km/hSpeed 30 km/h.
If you enter or exit a parking space usingActive Parking Assist, and press buttonC,indicator lampDflashes. DSR can then notbe switched on.
Deactivating DSR
XPress buttonC.Indicator lampDgoes out.
The DSR symbol appears in the multifunc-tion display with theOffOffmessage.
DSR is deactivated automatically if you drivefaster than 22 mph (Canada: 35 km/h). TheDSR symbol appears in the multifunction dis-play along with theOffOffmessage. You alsohear a warning tone.
Driving systems169
Driving an d parking
Z

Problems with Parking Assist PARKTRONIC
ProblemPossible causes/consequences andPPSolutions
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. You alsohear a warning tone forapproximately two sec-onds.
Parking AssistPARKTRONIC is thendeactivated and theindicator lamp on thePARKTRONIC buttonlights up.
Parking Assist PARKTRONIC has malfunctioned and has been deac-tivated.
XIf problems persist, have Parking Assist PARKTRONIC checked ata qualified specialist workshop.
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. ParkingAssist PARKTRONIC isthen deactivated.
The Parking Assist PARKTRONIC sensors are dirty or there is inter-ference.
XClean the Parking Assist PARKTRONIC sensors (Ypage 282).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-sound waves.
XCheck to see if Parking Assist PARKTRONIC works at a differentlocation.
Active Parking Assist
General notes
Active Parking Assist is an electronic parkingaid with ultrasound. It measures the road onboth sides of the vehicle. A parking symbolindicates a suitable parking space. Activesteering intervention and brake applicationcan assist you during parking and when exitinga parking space. You can also still use ParkingAssist PARKTRONIC (Ypage 171).
Important safety notes
Active Parking Assist is merely an aid. It is nota replacement for your attention to your imme-diate surroundings. You are always responsi-ble for safe maneuvering, parking and exiting aparking space. Make sure that there are nopersons, animals or objects in the maneuver-ing area when you are maneuvering or parking.
When Parking Assist PARKTRONIC is deactiva-ted, Active Parking Assist is also unavailable.
GWARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
cause you to collide with other road users or
objects. There is a risk of an accident.
Pay attention to other road users or objects.
Stop the vehicle if necessary or cancel the
Active Parking Assist parking procedure.
!If they cannot be avoided, drive overobstacles such as curbs slowly and at anobtuse angle. Otherwise, you may damagethe wheels or tires.
Active Parking Assist may possibly indicateparking spaces which are not suitable for park-ing, for example:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
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Driving and parking

Rif the camera lens is dirty or obstructed.Observe the notes on cleaning(Ypage 283)
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 therear view camera may be restricted due toadditional accessories on the rear of the vehi-cle (e.g. license plate holder, rear bicyclerack).
iThe contrast of the display may be affec-ted by the sudden presence of sunlight orother light sources, e.g. when exiting agarage. Pay particular attention in this situa-tion.
iIf usability is severely restricted, e.g. dueto pixel errors, have the display repaired orreplaced.
Activating/deactivating the rear view
camera
XTo activate:make sure that the SmartKeyis in positionHin the ignition lock.
XMake sure that theActivation by R gearActivation by R gearfunction is selected in the multimedia sys-tem; see the Digital Operator's Manual.
XEngage reverse gear.The area behind the vehicle is shown withguide lines in the multimedia system dis-play.
The image from the rear view camera isavailable throughout the maneuvering proc-ess.
To deactivate:the rear view camera deacti-vates if you shift the transmission to]orafter driving forwards a short distance.
The inner segments of the warning indicatorare displayed in red if there is a complete sys-tem failure. The indicator lamp in thePARKTRONIC button lights up.
If the system fails at the rear of the vehicle:
Rthe rear segments are shown in red whenbacking up.
Rthe rear segments are hidden when drivingforwards.
Messages in the multimedia system
display
The rear view camera may show a distortedview of obstacles, show them incorrectly ornot at all. The rear view camera does not showobjects in the 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 bot-tom-most guideline.
CYellow guide line at a distance of approx-imately 13 ft (4.0 m) from the rear of thevehicle
DWhite guide line without steering input –vehicle width including the exterior mirrors(static)

If the lanes are narrow, vehicles driving in thelane beyond the lane next to your vehicle maybe indicated, especially if the vehicles are notdriving in the middle of their lane. This may bethe case if the vehicles are driving on the innerside of their lane.
Due to the nature of the system:
Rwarnings may be issued in error when driv-ing close to crash barriers or similar solidlane borders.
Rwarnings may be interrupted when you aredriving alongside particularly long vehicles,such as trucks, for a prolonged time.
Warning display
CWarning display
Blind Spot Assist is not active at speeds belowapproximately 20 mph (30 km/h). Vehicles inthe monitoring range are then not indicated.
When Blind Spot Assist is activated, indicatorlampCin the exterior mirrors lights up yellowat speeds of up to 20 mph (30 km/h). Atspeeds above 20 mph (30 km/h), the indicatorlamp goes out and Blind Spot Assist is opera-tional.
If a vehicle is detected within the blind spotmonitoring range at speeds above 20 mph(30 km/h), warning lampCon the corre-sponding side lights up red. This warning isalways emitted when a vehicle enters the blindspot monitoring range from behind or from theside. When you overtake a vehicle, the warningonly occurs if the difference in speed is lessthan 7 mph (12 km/h).
The yellow indicator lamp goes out if reversegear is engaged. In this event, Blind SpotAssist is no longer active.
The brightness of the indicator/warning lampsis adjusted automatically according to theambient light.
Collision warning
If a vehicle is detected in the monitoring rangeof Blind Spot Assist and you switch on the cor-responding turn signal, a double warning tonesounds. Red warning lampCflashes. If theturn signal remains on, vehicles detected areindicated by the flashing of red warninglampC. There are no further warning tones.
Switching on Blind Spot Assist
XMake sure that Blind Spot Assist is activa-ted in the on-board computer (Ypage 198).
XTurn the SmartKey to positionHin the igni-tion lock.Warning lampsCin the exterior mirrorslight up red for approximately 1.5 secondsand then turn yellow.
Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in frontof your 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.
This function is available in the range between40 mph and 120 mph (60 km/h and200 km/h).
A warning may be given if a front wheel passesover a lane marking. It will warn you by meansof intermittent vibration in the steering wheelfor up to 1.5 seconds.
Important safety notes
GWARNING
Lane Keeping Assist cannot always clearly
detect lane markings.
186Driving systems
Driving and parking