engine MERCEDES-BENZ GLA SUV 2018 Service Manual
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2018, Model line: GLA SUV, Model: MERCEDES-BENZ GLA SUV 2018Pages: 338, PDF Size: 5.59 MB
Page 98 of 338
The system automatically switches off approx-
imately 20 minutes after it is set to level1.
XTurn the SmartKey to position1or2 in the
ignition lock (Ypage 124).
XTo switch on: press button:repeatedly
until the desired heating level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
heating may switch off.
Problems with the seat heating
ProblemPossible causes/consequences and MSolutions
The seat heating has
switched off prematurely
or cannot be switched
on.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will switch
back on automatically.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies to mobile phones if the "Digital
Car Key in smartphone" function is activated
via the Mercedes me connect web app. Never leave children unsupervised in the vehicle.
Adjusting the steering wheel
GWARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is a risk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
:Release lever
;Adjusts the steering wheel height
=Adjusts the steering wheel position (fore-
and-aft adjustment)
96Steering wheel
Seats, steering wheel and mirrors
Page 99 of 338
XPush release lever:down completely.
The steering column is unlocked.
XAdjust the steering wheel to the desired posi-
tion.
XPush release lever :up completely.
The steering column is locked.
XCheck if the steering column is locked. When
doing so, try to push the steering wheel up or down or try to move it in the fore-and-aft
direction.
Mirrors
Rear-view mirror
XAnti-glare mode: flick anti-glare lever :for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is a risk of an acci-
dent.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder.
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 124).
XExterior mirror on the front-passenger side:
press button ;.
Exterior mirror on the driver's side: press but-
ton :.
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button =as long as the indicator
lamp is lit.
XPress button =up, down, or to the right or
left until you have adjusted the exterior mirror
to the correct position. You should have a
good overview of traffic conditions.
The convex exterior mirrors provide a larger field of vision.
After the engine has been started, the exterior
mirrors are automatically heated at low outside
temperatures. Heating takes a maximum of ten
minutes.
iYou can also heat up the exterior mirrors
manually by switching on the rear window
defroster.
Mirrors97
Seats, steering wheel and mirrors
Z
Page 101 of 338
The "Automatic anti-glare mirrors" function is
only available if the vehicle is equipped with the
"Mirrors package".
The rear-view mirror and the exterior mirror on
the driver's side automatically go into anti-glare
mode if:
Rthe ignition is switched on and
Rincident light from headlamps strikes the sen-
sor in the rear-view mirror
The mirrors do not go into anti-glare mode if
reverse gear is engaged or if the interior lighting
is switched on.
Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking position
You can set the front-passenger side exterior
mirror such that you can see the rear wheel on
that side as soon as you engage reverse gear.
You can store this position.
:Button for the driver's side exterior mirror
;Button for the front-passenger side exterior
mirror
=Button for the exterior mirror setting
?Memory button M
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 2in the igni-
tion lock or start the engine (Ypage 124).
XPress button ;.
XEngage reverse gear.
The exterior mirror on the front-passenger
side moves to the default parking position.
XUse button=to adjust the exterior mirror to
a position that allows you to see the rear
wheel and the curb.
The parking position is stored.
iIf you shift the transmission to another posi-
tion, the front-passenger side exterior mirror
returns to the driving position.
Calling up a stored parking position set-
ting
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 124).
XAdjust the front-passenger side exterior mir-
ror using the corresponding button
(
Ypage 97).
XEngage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger side
moves back to its original position:
Ras soon as you exceed a speed of 9 mph
(15 km/h)
Rabout ten seconds after you have disengaged
reverse gear
Rwhen you use button :to select the exterior
mirror on the driver's side
Memory function
Important safety notes
GWARNING
If you use the memory function on the driver's side while driving, you could lose control of
the vehicle as a result of the adjustments
being made. There is a risk of an accident.
Only use the memory function on the driver's
side when the vehicle is stationary.
GWARNING
When the memory function adjusts the seat,
you and other vehicle occupants – particularly
children – could become trapped. There is a
risk of injury.
While the memory function is making adjust-
ments, make sure that no one has any body
parts in the sweep of the seat. If somebody
becomes trapped, immediately release the
memory function position button. The adjust-
ment process is stopped.
Memory function99
Seats, steering wheel and mirrors
Z
Page 103 of 338
Exterior lighting
General notes
For reasons of safety, Mercedes-Benz recom-
mends that you drive with the lights switched on
even during the daytime. In some countries,
operation of the headlamps varies due to legal
requirements and self-imposed obligations.
Setting the exterior lighting
Setting options
Exterior lighting can be set using the:
Rlight switch
Rcombination switch (Ypage 103)
Ron-board computer (Ypage 196)
Light switch
Operation
1 WLeft-hand standing lamps
2XRight-hand standing lamps
3TParking lamps, license plate and
instrument cluster lighting
4ÃAutomatic headlamp mode, controlled
by the light sensor
5LLow-beam/high-beam headlamps
B RRear fog lamp
CNFog lamp (only vehicles with front fog
lamps)
If you hear a warning tone when you leave the
vehicle, the lights may still be switched on.
XTurn the light switch to the Ãposition. The exterior lighting (except the parking/stand-
ing lamps) switches off automatically if you:
Rremove the SmartKey from the ignition lock
Ropen the driver's door with the SmartKey in
position
g
Automatic headlamp mode
Ãis the preferred light switch position:
RThe light setting is automatically selected
according to the brightness of the ambient
light (exception: poor visibility due to weather
conditions such as fog, snow or spray).
RWith the SmartKey in position 1in the igni-
tion lock: the parking lamps are switched on
or off automatically depending on the bright-
ness of the ambient light.
RWith the engine running: if you have activated
the Daytime Running Lightsfunction via
the on-board computer, the daytime running
lamps or the parking lamps and the low-beam
headlamps are switched on or off automati-
cally depending on the brightness of the ambi-
ent light.
XTo switch on the automatic headlamp
mode: turn the light switch to the Ãposi-
tion.
GWARNING
When the light switch is set to Ã, the low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There is a risk of an
accident.
In such situations, turn the light switch to
L.
The automatic headlamp feature is only an aid.
The driver is responsible for the vehicle's light-
ing at all times.
Canada only:
The daytime running lamps improve the visibility
of your vehicle during the day. The daytime run-
ning lamps function is required by law in Can-
ada. It cannot therefore be deactivated.
When the engine is running and the vehicle is
stationary: if you shift the automatic transmis-
sion from a driving position to position jthe
daytime running lamps or low-beam headlamps
go out after 3 minutes.
Exterior lighting101
Lights and windshield wipers
Z
Page 104 of 338
When the engine is running, the vehicle is sta-
tionary and in bright ambient light: if you turn the
light switch to theTposition, the daytime
running lamps and parking lamps turn on.
If the engine is running and you turn the light
switch to the Lposition, the manual settings
take precedence over the daytime running
lamps.
USA only:
The daytime running lamps improve the visibility
of your vehicle during the day. To do this, the
daytime running lamps function must be
switched on using the on-board computer
(
Ypage 196).
If the engine is running and you turn the light
switch to the TorL position, the manual
settings take precedence over the daytime run-
ning lamps.
Low-beam headlamps
Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on
and the light switch is set to the Lposition.
This is a particularly useful function in the event
of rain and fog.
XTo switch on the low-beam headlamps:
turn the SmartKey to position 2in the igni-
tion lock or start the engine.
XTurn the light switch to L.
The green Lindicator lamp in the instru-
ment cluster lights up.
Front fog lamps
In conditions where visibility is poor due to fog,
snow or rain, the fog lamps improve visibility as
well as making it easier for other road users to
see you. They can be operated together with the
parking lamps or together with the parking
lamps and low-beam headlamps.
XTo switch on the fog lamps: turn the Smart-
Key to position 2in the ignition lock or start
the engine.
XTurn the light switch to LorÃ.
XPress the Nbutton.
The green Nindicator lamp in the instru-
ment cluster lights up.
XTo switch off the fog lamps: press theN
button.
The green Nindicator lamp in the instru-
ment cluster goes out.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take note of the country-specif ic
regulat
ions for the use of rear fog lamps.
XTo switch on the rear fog lamp: turn the
SmartKey in the ignition lock to position 2or
start the engine.
XTurn the light switch to LorÃ.
XPress the Rbutton.
The yellow Rindicator lamp in the instru-
ment cluster lights up.
XTo switch off the rear fog lamp: press the
R button.
The yellow Rindicator lamp in the instru-
ment cluster goes out.
Parking lamps
!If the battery charge is very low, the parking
lamps or standing lamps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and in a well lit
area, in accordance with the relevant legal
stipulations. Avoid using the Tparking
lamps over a period of several hours. If pos-
sible, switch on the right-hand Xor left-
hand W standing lamps.
XTo switch on: turn the light switch to T.
The green Tindicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures the
corresponding side of the vehicle is illuminated.
XTo switch on the standing lamps: the
SmartKey is not in the ignition lock or it is in
position gin the ignition lock.
XTurn the light switch to W(left-hand side of
the vehicle) or X(right-hand side of the
vehicle).
102Exterior lighting
Lights and windshield wipers
Page 111 of 338
For this reason, you should always switch off
the windshield wipers in dry weather.
Vehicles with a rain sensor: in the ÄorÅ
position, the appropriate wiping frequency is
automatically set according to the intensity of
the rain. In the Åposition, the rain sensor is
more sensitive than in the Äposition, caus-
ing the windshield wiper to wipe more fre-
quently.
If the wiper blades are worn, the windshield will
no longer be wiped properly. This could prevent
you from observing the traffic conditions.
Switching the rear window wiper on/
off
Combination switch
:
è Switch
2ôWipes with washer fluid
3ISwitches on intermittent wiping
40 Switches off intermittent wiping
5ô Wipes with washer fluid
XSwitch on the ignition.
XSlide switch :on the combination switch to
the corresponding position.
When the rear window wiper is switched on,
the è symbol appears in the assistance
graphic in the instrument cluster. Further
information on the assistance graphic
(
Ypage 194).
Replacing the wiper blades
Important safety notes
GWARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could be trapped by the wiper arm. There is a risk of
injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
!To avoid damaging the wiper blades, make
sure that you touch only the wiper arm of the
wiper.
!Never open the hood/tailgate if a wiper arm
has been folded away from the windshield/
rear window.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield/rear
window.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release the
wiper arm without a wiper blade and it falls
onto the windshield/rear window, the wind-
shield/rear window may be damaged by the
force of the impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified spe-
cialist workshop.
Changing the windshield wiper blades
Removing the wiper blades
XVehicles without KEYLESS-GO or KEY-
LESS-GO start function: remove the Smart-
Key from the ignition lock.
XVehicles with KEYLESS-GO or KEYLESS-
GO start function: switch off the engine.
XFold the wiper arm away from the windshield.
Windshield wipers109
Lights and windshield wipers
Z
Page 113 of 338
Replacing the rear window wiper blade
Removing a wiper blade
XVehicles without KEYLESS-GO or KEY-
LESS-GO start function:remove the Smart-
Key from the ignition lock.
XVehicles with KEYLESS-GO or KEYLESS-
GO start function: switch off the engine.
XFold wiper arm?away from the rear window.
XPress both release clips ;.
XFold wiper blade:in the direction of
arrow =away from wiper arm ?.
XRemove wiper blade:in the direction of
arrow A.
Installing a wiper blade
XPosition new wiper blade :with recess B
on lug A.
XFold wiper blade :in the direction of
arrow =onto the wiper arm, until retaining
clips ;engage in bracket ?.
XMake sure that wiper blade :is seated cor-
rectly.
XFold the wiper arm back onto the rear win-
dow.
Problems with the windshield wipers
ProblemPossible causes/consequences and MSolutions
The windshield wipers
are jammed.Leaves or snow, for example, may be obstructing the windshield wiper
movement. The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the igni-
tion lock.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist work-
shop.
The windshield washer
fluid from the spray noz-
zles no longer hits the
center of the windshield.The spray nozzles are misaligned.
XHave the spray nozzles adjusted at a qualified specialist workshop.
Windshield wipers111
Lights and windshield wipers
Z
Page 114 of 338
Overview of climate control systems
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Rswitch on the defrost windshield function
briefly, if required
The air-conditioning system or dual-zone auto-
matic climate control regulates the temperature and the humidity of the vehicle interior and fil-
ters undesirable substances from the air.
The air-conditioning system or dual-zone auto-
matic climate control can only be operated
when the engine is running. Optimum operation
is only achieved with the side windows and pan- orama roof with power tilt/sliding panel closed.
If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 84).
The residual heat function can only be activated
or deactivated with the ignition switched off
(
Ypage 121). Always keep the ventilation flaps behind the
side trim panel in the cargo compartment clear
(
Ypage 107). Otherwise the vehicle will not be
ventilated correctly.
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 84). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
iThe integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. A clogged filter reduces the
amount of air supplied to the vehicle interior.
For this reason, you should always observe
the interval for replacing the filter, which is
specified in the Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
iIt is possible that under certain circumstan-
ces the residual heat function may be activa-
ted automatically an hour after the SmartKey
has been removed in order to dry the aut
o-
matic climate control. The vehicle is then ven-
tilated for 30 minutes.
112Overview of climate control systems
Climate control
Page 116 of 338
BSwitches cooling with air dehumidification on/off (Ypage 117)
CSwitches the rear window defroster on/off (Ypage 120)
Notes on using the air-conditioning
system
Air-conditioning system
Below, you can find a number of notes and rec-
ommendations to help you use the air-condi-
tioning system optimally.
RSwitch on the air-conditioning system by turn- ing control knob Aclockwise to the desired
position (except position 0).
RSet the temperature to 72 ‡ (22 †).
RRecommendation for avoiding misted
windows at low exterior temperatures or
in rain: switch on the ¿cooling with dehu-
midification function (
Ypage 117).
Set air distribution to ¯and if possible
switch off PandO (
Ypage 118).
Deactivate air-recirculation mode e
(
Ypage 121).
Set airflow control Ato a setting between 3
and 6(
Ypage 119).
RRecommendation for rapid cooling or
heating of the vehicle interior: briefly set
airflow control Ato a setting between 3and
6 (
Ypage 119).
RRecommendation for a constant vehicle
interior temperature: set airflow controlA
to a setting between 1and 3(
Ypage 119).
RRecommendation for air distribution in
winter: select the Oand¯ settings
(
Ypage 118).
Recommendation for air distribution in
summer: select the PorP and¯
settings (
Ypage 118).
ROnly use the "Windshield defrosting" function
briefly until the windshield is clear again.
ROnly use air-recirculation mode briefly, e.g. if
there are unpleasant outside odors or when in
a tu
nnel. The windows could otherwise fog up,
since no fresh air is drawn into the vehicle in
air-recirculation mode.
RIf you change the settings of the climate con-
trol system, the climate status display
appears for approximately three seconds at
the bottom of the screen on the multimedia
system display; see Digital Operator's Man-
ual. You will see the current settings of the
various climate control functions.
DYNAMIC SELECT button (except
Mercedes-AMG vehicles)
You can choose between various drive programs
with the DYNAMIC SELECT button
(
Ypage 130).
If you have selected drive program E:
Rwhen heating, the electrical heater booster is
deactivated and in the warming-up phase
heat output is reduced
Rthe rear window defroster running time is
reduced
Depending on the configuration, climate set-
tings may also be influenced in the drive pro-
gram I.
If you have selected drive program Cor S, cli-
mate settings are not influenced.
ECO start/stop function
During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require the full climate control output,
you can switch off the ECO start/stop function
by pressing the ECO button (
Ypage 129).
114Overview of climate control systems
Climate control
Page 119 of 338
ual. Youwillsee the current settings of the
various climate control functions.
DYNAMIC SELECT button (except
Mercedes-AMG vehicles)
You can choose between various drive programs
wit h the DYNAM IC SELECT button
(
Ypage 130).
If you have selected drive program E:
Rwhen heating, the electrical heater booster is
deactivated and inthe warming-up phase
heat output isreduced
Rthe rear window defroster running time is
reduced
Dependin g on the configuration, climate set-
tings may also beinfluenced inthe drive pro-
gram I.
If you have selected drive program Cor S,cli-
mate settings are not influenced.
ECO start/stop function
During automat icengine switch-off, the climate
control system only operates at a reduced capa-
city. Ifyou require the full climate control output,
you can switch off the ECO start /stop function
by pressing the ECO button (
Ypage 129).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the air
supply and air circulation are also switched off.
The wind ows could fog up. Therefore, switch off
clim ate control only brie fly
Air-conditioning system
XTurn theSmartKey to position 2inthe igni-
tion lock (Ypage 124).
XTo switch on: turn controlAclock wiseto
the desired position (except position 0)
(
Ypage 113).
XTo switch off: turn controlAcounter-clock-
wise to position 0(Ypage 113).
Dual-zone automatic climate control
XTurn the SmartKey to position 2inthe igni-
tion lock (Ypage 124).
XTo activate: press theÃbutton.
The indicator lamp inthe à button lights
up. Airflow and air distribution are set to auto-
mat icmode.
or
XPress the ^button.
The indicator lamp inthe ^ button goes
out. The previously selected settings are
restored.
XTo deactivate: press the^button.
The indicator lamp inthe ^ button lights
up.
iDual-zone automatic climate control: switch
on clim ate control primarily using the Ã
button.
Switching cooling with air dehumidi-
fication on/off
General notes
If you deactivate the "Cooling with air-dehumid-
ification" function, the air inside the vehicle will
not becooled. The air inside the vehicle willalso
not be dehumidif ied. The windows can fog up
more quickly. Therefore, only deactivate the
"Cooling with air-dehumidif ication" function
briefly.
The "Cooling with air dehumidif ication" function
is only availab lewhen the engine isrunning. The
air inside the vehicle iscooled and dehumidif ied
according to the temperature selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a malfunc-
tion.
Activating/deactivating
XPress the ¿button.
The indicator lamp inthe ¿ button lights
up or goes out.
The indicator lamp inthe button indicates that
the respective function isactivated. The
"Cooling with air dehumidif ication" function
has a delayed switch-off feature.
Operating the climate control systems117
Climate control