light MERCEDES-BENZ GLA 2019 Service Manual

If you come into contact with the electro-
lyte, observe the following:
RRinse off the electrolyte from your skin
immediately with water.
RImmediately rinse the electrolyte out of
your eyes thoroughly with clean water.
RIf the electrolyte is swallowed, immedi-
ately rinse your mouth out thoroughly. Do
not induce vomiting.
RIf electrolyte comes into contact with your
skin or hair or is swallowed, seek medical
attention immediately.
RImmediately change out of clothing which
has come into contact with electrolyte.
RIf an allergic reaction occurs, seek medi-
cal attention immediately.
The "Automatic anti-glare mirrors" function isonly available if the vehicle is equipped withthe "Mirrors package".
The rear-view mirror and the exterior mirror onthe driver's side automatically go into anti-glare mode if:
Rthe ignition is switched on and
Rincident light from headlamps strikes thesensor in the rear-view mirror
The mirrors do not go into anti-glare mode ifreverse gear is engaged or if the interior light-ing is switched on.
Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking posi-
tion
You can set the front-passenger side exteriormirror such that you can see the rear wheel onthat side as soon as you engage reverse gear.You can store this position.
CButton for the driver's side exterior mirror
DButton for the front-passenger side exte-rior mirror

Exterior lighting
General notes
For reasons of safety, Mercedes-Benz recom-mends that you drive with the lights switchedon even during the daytime. In some coun-tries, operation of the headlamps varies due tolegal requirements and self-imposed obliga-tions.
Setting the exterior lighting
Setting options
Exterior lighting can be set using the:
Rlight switch
Rcombination switch (Ypage 104)
Ron-board computer (Ypage 199)
Light switch
Operation
GcLeft-hand standing lamps
HdRight-hand standing lamps
I`Parking lamps, license plate andinstrument cluster lighting
JXAutomatic headlamp mode, control-led by the light sensor
KXLow-beam/high-beam headlamps

daytime running lamps or low-beam head-lamps go out after 3 minutes.
When the engine is running, the vehicle is sta-tionary and in bright ambient light: if you turnthe light switch to the`position, the day-time running lamps and parking lamps turn on.
If the engine is running and you turn the lightswitch to theXposition, the manual set-tings take precedence over the daytime run-ning lamps.
USA only:
The daytime running lamps improve the visibil-ity of your vehicle during the day. To do this,the daytime running lamps function must beswitched on using the on-board computer(Ypage 199).
If the engine is running and you turn the lightswitch to the`orXposition, the man-ual settings take precedence over the daytimerunning lamps.
Low-beam headlamps
Even if the light sensor does not detect that itis dark, the parking lamps and low-beam head-lamps switch on when the ignition is switchedon and the light switch is set to theXposi-tion. This is a particularly useful function in theevent of rain and fog.
XTo switch on the low-beam headlamps:turn the SmartKey to positionHin the igni-tion lock or start the engine.
XTurn the light switch toX.The greenXindicator lamp in the instru-ment cluster lights up.
Front fog lamps
In conditions where visibility is poor due tofog, snow or rain, the fog lamps improve visi-bility as well as making it easier for other roadusers to see you. They can be operatedtogether with the parking lamps or togetherwith the parking lamps and low-beam head-lamps.
XTo switch on the fog lamps:turn theSmartKey to positionHin the ignition lockor start the engine.
XTurn the light switch toXorX.
XPress theZbutton.The greenZindicator lamp in the instru-ment cluster lights up.
XTo switch off the fog lamps:press theZbutton.The greenZindicator lamp in the instru-ment cluster goes out.
Rear fog lamp
The rear fog lamp improves visibility of yourvehicle for the traffic behind in the event ofthick fog. Please take note of the country-spe-cific regulations for the use of rear fog lamps.
XTo switch on the rear fog lamp:turn theSmartKey in the ignition lock to positionHor start the engine.
XTurn the light switch toXorX.
XPress the^button.The yellow^indicator lamp in the instru-ment cluster lights up.
XTo switch off the rear fog lamp:press the^button.The yellow^indicator lamp in the instru-ment cluster goes out.
Parking lamps
!If the battery charge is very low, the park-ing lamps or standing lamps are automati-cally switched off to enable the next enginestart. Always park your vehicle safely and ina well lit area, in accordance with the rele-vant legal stipulations. Avoid using the`parking lamps over a period of severalhours. If possible, switch on the right-handdor left-handcstanding lamps.
XTo switch on:turn the light switch to`.The green`indicator lamp in the instru-ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures thecorresponding side of the vehicle is illumina-ted.
XTo switch on the standing lamps:theSmartKey is not in the ignition lock or it is inpositionZin the ignition lock.
XTurn the light switch toc(left-hand sideof the vehicle) ord(right-hand side ofthe vehicle).
Exterior lighting103
Lights and windshield wipers
Z

direction you are turning, enabling better visi-bility in tight bends, for example. It can only beactivated when the low-beam headlamps areswitched on.
Active:
Rif you are driving at speeds below 25 mph(40 km/h) and switch on the turn signal orturn the steering wheel
Rif you are driving at speeds between 25 mph(40 km/h) and 45 mph (70 km/h) and turnthe steering wheel
The cornering lamp may remain lit for a shorttime, but is automatically switched off after nomore than three minutes.
Headlamps fogged up on the inside
Certain climatic and physical conditions maycause moisture to form in the headlamp. Thismoisture does not affect the functionality ofthe headlamp.
Interior lighting
Overview of interior lighting
Front overhead control panel
C=Switches the left-hand front readinglamp on or off
DJSwitches the front interior lighting on

Automatic interior lighting control
XTo switch on:set the switch to center posi-tion

XInsert the new bulb and engage it to thestop.
XPress on housing coverCand turn it to theright.
Turn signals (halogen headlamps)
XSwitch off the lights.
XOpen the hood.
XTurn bulb holderCcounter-clockwise andpull out.
XTurn the bulb counter-clockwise and pull itout of bulb holderC.
XInsert the new bulb into bulb holderC.
XInsert bulb holderCand turn it clockwiseuntil it engages.
Replacing rear bulbs
Opening and closing the side trim pan-
els
Left-hand side trim panel
You must open the side trim panel in the cargocompartment before you can replace the bulbsin the tail lamps.
XTo open:turn release knobCcounter-clockwise and remove side trim panelD.
XTo close:insert side trim panelDand turnrelease knobCclockwise.
Right-hand side trim panel
You must open the side trim panel in the cargocompartment before you can replace the bulbsin the tail lamps.
XTo open:release right-hand trim panelCatthe top and fold it down in the direction ofthe arrow.
XTo close:replace side panelingC.
Tail lamps
Due to their location, have the bulbs in thebackup lamp (vehicles with halogen head-lamps) and rear fog lamp in the tailgatechanged at a qualified specialist workshop.
XSwitch off the lights.
XOpen the cargo compartment.
XOpen the side trim panel (Ypage 108).
XRelease and remove connectorD.
XHold the tail lamp and unscrew fendernutC.
XRemove the tail lamp.
108Replacing bulbs
Lights and windshield wipers

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andPPSolutions
The indicator lamp intheZbutton flashesthree times or remainsoff. The "Cooling withair dehumidification"function cannot beswitched on.
Cooling with air dehumidification has been deactivated due to amalfunction.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
The automatic climate control function is onlyavailable in conjunction with dual-zone auto-matic climate control.
In automatic mode, the set temperature ismaintained automatically at a constant level.The system automatically regulates the tem-perature of the dispensed air, the airflow andthe air distribution.
The "Cooling with air dehumidification" func-tion is activated automatically in automaticmode.
Setting climate control to automatic
XTurn the SmartKey to positionDin the igni-tion lock (Ypage 125).
XSet the desired temperature.
XTo activate:press theXbutton.The indicator lamp in theXbutton lightsup. Automatic air distribution and airflow areactivated.
XTo switch to manual mode:press theOorJbutton.
or
XPress the

iYou should only select the "Windshielddefrosting" function until the windshield isclear again.
Switching the "Windshield defrosting"
function on or off
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 125).
XTo activate:press thedbutton.The indicator lamp in thedbutton lightsup.
The climate control system switches to thefollowing functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and frontside windows
Rair-recirculation mode off
iThe "Windshield defrosting" function auto-matically sets the blower level to the opti-mum defrosting effect. As a result, the air-flow may increase or decrease automaticallyafter thedbutton is pressed.
iYou can adjust the blower level manuallywhile the "Windshield defrosting" function isin operation:
RAir-conditioning system: turn airflow con-trol

Rear window defroster
General notes
The rear window defroster has a high currentdraw. You should therefore switch it off assoon as the rear window is clear. Otherwise,the rear window defroster switches off auto-matically after several minutes.
If the battery voltage is too low, the rear win-dow defroster may switch off.
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 125).
XPress thelbutton.The indicator lamp in thelbutton lightsup or goes out.
Problems with the rear window defroster
ProblemPossible causes/consequences andPPSolutions
The rear windowdefroster has deactiva-ted prematurely or can-not be activated.
The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. readinglamps, interior lighting or the seat heating.When the battery is sufficiently charged, the rear windowdefroster can be activated again.
Switching air-recirculation mode
on/off
General notes
You can deactivate the flow of fresh air ifunpleasant odors are entering the vehicle fromoutside. The air already inside the vehicle willthen be recirculated.
If you switch on air-recirculation mode, thewindows can fog up more quickly, in particularat low temperatures. Only use air-recirculationmode briefly to prevent the windows from fog-ging up.
The operation of air-recirculation mode is thesame for all control panels.
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 125).
XTo activate:press the

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