2019 MERCEDES-BENZ GLA engine

Important safety notes
ATTENTION ASSIST is only an aid to the driver.It might not always recognize fatigue orincreasing inattentiveness in time or fail torecognize them at all. The system is not a sub-stitute for a well-rested and attentive driver.
The functionality of ATTENTION ASSIST isrestricted and warnings may be delayed or notoccur at all:
Rif the length of the journey is less thanapproximately 30 minutes
Rif the road condition is poor, e.g. if the sur-face is uneven or if there are potholes
Rif there is a strong side wind
Rif you have adopted a sporty driving stylewith high cornering speeds or high rates ofacceleration
Rif you are predominantly driving slower than37 mph (60 km/h) or faster than 125 mph(200 km/h)
Rif the time has been set incorrectly
Rin active driving situations, such as whenyou change lanes or change your speed
ATTENTION ASSIST is reset when you continueyour journey and starts assessing your tired-ness again if:
Ryou switch off the engine
Ryou take off your seat belt and open thedriver's door, e.g. for a change of drivers orto take a break
Displaying the attention level
You can have current status information dis-played in the assistance menu (Ypage 196)of the on-board computer.
XSelect the Assistance display for AttentionAssist using the on-board computer(Ypage 197).
The following information is displayed:
RThe length of the journey since the lastbreak.
RTheAttention LevelAttention Leveldetermined byATTENTION ASSIST, displayed in a bar dis-play in five levels from high to low.
RIf ATTENTION ASSIST is unable to calculatethe attention level and cannot output awarning, theSystem SuspendedSystem Suspendedmessageappears. The bar display then changes thedisplay, such as when you are driving at aspeed below 37 mph (60 km/h) or above125 mph (200 km/h).
Activating ATTENTION ASSIST
XActivate ATTENTION ASSIST using the on-board computer (Ypage 198).The system determines the attention level ofthe driver depending on the setting selec-ted:
StandardStandardselected: the sensitivity with whichthe system determines the attention level isset to normal.
SensitiveSensitiveselected: the sensitivity is sethigher. The attention level detected by Atten-tion Assist is adapted accordingly and thedriver is warned earlier.
When ATTENTION ASSIST is deactivated, the

Important safety notes
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.
You must observe the legal requirements forthe country in which you are currently drivingwhen operating the on-board computer.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety.
The operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messagesor warnings from certain systems in the multi-function display. You should therefore makesure your vehicle is operating safely at alltimes.
If the operating safety of your vehicle isimpaired, pull over as soon as it is safe to doso. Contact a qualified specialist workshop.
For an overview, see the instrument panelillustration (Ypage 32).
Displays and operation
Instrument cluster lighting
The light sensor in the instrument cluster auto-matically controls the brightness of the multi-function display. In daylight, the displays in theinstrument cluster are not illuminated.
The lighting in the instrument cluster, in thedisplays and the controls in the vehicle interiorcan be adjusted using the brightness controlknob.
The brightness control knob is located on thebottom left of the instrument cluster(Ypage 32).
XTurn the brightness control knob clockwiseor counter-clockwise.If the light switch is set to theX,`orXposition, the brightness is dependentupon the brightness of the ambient light.
Speedometer with segments
The speedometer is only divided into seg-ments in vehicles with Active Distance AssistDISTRONIC.
The segments in the speedometer indicatewhich speed range is available.
RActive Distance Assist DISTRONIC activated(Ypage 158):
One or two segments in the set speed rangelight up.
RActive Distance Assist DISTRONIC detects avehicle in front moving more slowly than thestored speed:
The segments between the speed of thevehicle in front and the stored speed lightup.
Tachometer
!Do not drive in the overrevving range, asthis could damage the engine.
The red band in the tachometer indicates theengine's overrevving range.
The engine is limited within a range to protectthe engine when the red band is reached.
Outside temperature display
You should pay special attention to road con-ditions when temperatures are around freezingpoint.
Bear in mind that the outside temperature dis-play indicates the temperature measured anddoes not record the road temperature.
188Displays and operation
On-board computer and displays

The outside temperature display is in the mul-tifunction display (Ypage 191).
There is a short delay before a change in out-side temperature appears in the multifunctiondisplay.
Coolant temperature gauge
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!A display message is shown if the coolanttemperature is too high.
If the coolant temperature is over 248 ‡(120 †), do not continue driving. Theengine will otherwise be damaged.
The coolant temperature gage is in the instru-ment cluster on the right-hand side(Ypage 32).
TheHmarking in the coolant temperaturegauge corresponds to a coolant temperatureof approximately 248 ‡ (120 †).
Under normal operating conditions and at thecorrect coolant level, the coolant temperaturegauge may rise to theHmarking.
Operating the on-board computer
Overview
CMultifunction display
DRight control panel

Displaying the assistance graphic
XPress theYorebutton on the steer-ing wheel to select theDriveAssistDriveAssistmenu.
XPresscordto selectAssist.Assist.GraphicGraphic.
XPressvto confirm.The multifunction display shows the ActiveDistance Assist DISTRONIC distance displayon the assistant display.
The assistance graphic displays the statusof and information from the following drivingsystems or driving safety systems:
RActive Distance Assist DISTRONIC(Ypage 158)
RActive Brake Assist (Ypage 61)
RATTENTION ASSIST (Ypage 183)
RLane Keeping Assist (Ypage 186)
RDSR (Ypage 169)
ROff-road program (Ypage 170)
RRear window wipers (Ypage 110)
XPressdto display the ATTEN-TION ASSIST assessment.
Deactivating/activating ESP®
Observe the important safety notes on ESP®
(Ypage 64).
GWARNING
If you deactivate ESP®, ESP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP®in the situations
described in the following.
It may be best to deactivate ESP®in the fol-lowing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
Deactivating/activating ESP®in Mercedes-AMG vehicles (Ypage 65).
For further information about ESP®, see(Ypage 63).
XStart the engine.
XPress theYorebutton on the steer-ing wheel to select theDriveAssistDriveAssistmenu.
XPresscordto selectESPESP.
XPressvto confirm.The current selection appears.
XTo activate/deactivate:press thevbutton again.
ESP®is deactivated if the

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 146).
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 toapply the electric parking brake manually.
XShift the transmission to position]as the electric parking brakeis not applied automatically.
XVisit a qualified specialist workshop.
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 for 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 parkingbrake:
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.
208Displaymessages
On-b oard computer and displays

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

Engine
Display messagesPossible causes/consequences andPPSolutions

Display messagesPossible causes/consequences andPPSolutions
=
See Operator's Man‐See Operator's Man‐ualual
The battery is not being charged.
A warning tone also sounds.
Possible causes are:
Ra defective alternator
Ra torn poly-V-belt
Ra malfunction in the electronics
!Do not drive any further. Otherwise the engine may overheat.
XPull over and stop the vehicle safely and switch off the engine,paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 145).
XConsult a qualified specialist workshop.
=
Stop Vehicle SeeStop Vehicle SeeOperator's ManualOperator's Manual
The battery is no longer being charged and the condition of chargeis too low.
A warning tone also sounds.
XPull over and stop the vehicle safely and switch off the engine,paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 145).
XObserve the instructions in the display message=See Oper‐See Oper‐ator's Manualator's Manual.
XConsult a qualified specialist workshop.