light MERCEDES-BENZ GLA-Class 2017 X156 Manual PDF

Problems with the rear window defroster
ProblemPossible causes/consequences andMSolutions
The rear window
defroster 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. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Switching air-recirculation mode
on/off
General notes
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
The operation of air-recirculation mode is the
same for all control panels.
Switching on/off
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 149).
XTo activate: press theebutton.
The indicator lamp in the ebutton lights
up.
Dual-zone automatic climate control: air-
recirculation mode is activated automatically:
Rat high outside temperatures
Rat high levels of pollution
When air-recirculation mode is activated
automatically, the indicator lamp in the e
button is not lit. Outside air is added after
about 30 minutes.
XTo deactivate: press theebutton.
The indicator lamp in the ebutton goes
out.
iAir-recirculation mode deactivates auto-
matically:
Rafter approximately five minutes at out-
side temperatures below approximately
45 ‡ (7 †)
Rafter approximately five minutes if the
"Cooling with air dehumidification" func-
tion is deactivated
Rafter approximately 30 minutes at out-
side temperatures above approximately
45 ‡ (7 †) if the cooling with air dehu-
midification function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available in
vehicles for Canada with dual-zone automatic
climate control.
It is possible to make use of the residual heat of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends 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
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
iYou cannot use the ventilation to cool the
vehicle interior to a temperature lower than
the outside temperature.
Operating the climate control systems143
Climate control

Switching on/off
XTurn the key to position0in the ignition
lock or remove it (
Ypage 149).
XTo activate: press theÌbutton.
The indicator lamp in the Ìbutton lights
up.
XTo deactivate: press theÌbutton.
The indicator lamp in the Ìbutton goes
out.
iResidual heat is deactivated automati-
cally:
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 frostbite 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 air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield
and 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 the
adjusters to the central position.
Setting the center air vents
XTo open the center air vent: turn the
adjuster in one of center air vents :coun-
ter-clockwise to position 2.
XTo close the center air vent: turn the
adjuster in one of center air vents :clock-
wise as far as it will go to position 3.
Setting the side air vents
:Side window defroster vent
;Side air vent
3Side air vent open
4Side air vent closed
XTo open a side air vent:turn the adjuster
in side air vent ;to the left in position 3.
XTo close a side air vent: turn the adjuster
in side air vent ;clockwise as far as it will
go to position 4.
144Air vents
Climate control

Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only
the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in
the ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO (
Ypage 77).
Do not keep the KEYLESS-GO key:
Rwith electronic devices, e.g. a mobile
phone or another SmartKey.
Rwith metallic objects, e.g. coins or metal
foil.
Rinside metallic objects, e.g. a metal case.
This can affect the functionality of KEYLESS-
GO.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will not be able to start the engine with the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the but- ton on the front door (
Ypage 84), you can
continue to start the engine with the Start/
Stop button.
The engine can be switched off while the vehi-
cle is in motion by pressing and holding the
Start/Stop button for three seconds. This
function operates independently of the ECO
start/stop automatic engine switch-off func-
tion. Key positions with the Start/Stop button
:Start/Stop button
;Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Further information on situations where
an indicator lamp either fails to go out after
starting the engine or lights up while driving
(
Ypage 268).
If Start/Stop button :has not yet been
pressed, this corresponds to the key being
removed from the ignition.
XTo switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when
in this position
XTo switch on the ignition: press Start/
Stop button :twice.
The ignition is switched on.
If you press Start/Stop button :once
when in this position, the ignition is
switched off again.
Removing the Start/Stop button
You can remove the Start/Stop button from
the ignition lock and start the vehicle as nor-
mal using the SmartKey.
150Driving
Driving and parking

Deactivating or activating theECO
start/stop function
XTo deactivate :press EC Obutto n:.
Indicator lamp ;goe sout .
XTo activate :press EC Obutto n:.
Indicator lamp ;lights up.
If th eindicator lamp on th eEC Obutto nis off,
th eEC Ostart/sto pfunction has been deac -
tivated manually or as th eresult of amal-
function .
AMG performance exhaust syste m
(Mercedes-AMG vehicles )
You can choosebetween differen tAM GPer -
formanc eexhaus tsystem volume susin gth e
position of th eexhaus tflap .
Each time you start th eengin ewit hth e
SmartKey or th eStart/Sto pbutton, th equi-
etest setting is activated.
Settin gth evolume :
XPress th e: button.
If you selec tth eloudest setting ,indicator
lamp ;lights up.
The volume of th eAM GPerformanc eexhaus t
system can also be set usin gth eDYNAMI C
SELECT controller (
Ypage 158).
Driving155
Driving and parking
Z

ProblemPossible causes/consequences andMSolutions
The engine is not run-
ning smoothly and is
misfiring.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
XHave the cause rectified immediately at a qualified specialist
workshop.
The coolant tempera-
ture gauge shows a
value above 248 ‡
(120 †). The coolant
warning lamp may also
be on and a warning
tone may sound.The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 311). Observe the warning
notes as you do so and add coolant if necessary.
DYNAMIC SELECT button (all vehicles
except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to change
the drive program. Depending on the drive
program selected the following vehicle char-
acteristics will change:
Rthe drive (engine and transmission man-
agement)
Rthe steering
Rthe availability of the ECO start/stop func-
tion
Rthe climate control:
Each time you start the engine with the
SmartKey or the Start/Stop button, drive pro-
gram Cis activated. For further information
about starting the engine, see (
Ypage 151).
XPress DYNAMIC SELECT button :as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display. After five seconds
the display goes out and the status icon of
the selected drive program appears.
In addition, the current drive program set-
tings are displayed briefly in the Audio 20 or
COMAND display.
iIn a few countries, the ECO start/stop
function is deactivated at the factory due to the available fuel grade. In this case, the
ECO start/stop function is not available in
any drive program, regardless of the display
in the Audio 20 or COMAND display.
DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)157
Driving and parking
Z

Available drive programs:
CComfortComfortable and econom-
ical driving characteristics
SSpo rtSporty driving character-
istics
IIndivi dualIndividual settings
Off-roadOptimal driving character-
istics for easily negotiable
off-road terrain
E EconomyParticularly economical
driving characteristics
Ad ditional information for drive programs
(
Ypage 164).
You can also change gear yourself using the
steering wheel paddleshifters. For further
information on the manual drive program
(
Ypage 166).
DYNAMIC SELECT controller
(Mercedes-AMG vehicles)
Use the DYNAMIC SELECT controller to
change the drive program. Depending on the
driv e program selected the following vehicle
characteristics will change:
Rthe drive
Rthe transmission management
RESP®
Rthe suspension (vehicles with AMG adap-
tive sport suspension system)
Rthe availab ility of the ECO start /stop func-
tion
Rthe availab ility of gliding mode
Each time you start the engine with the
Sm artKey or the Start /S top button, drive pro-
gram Cis activated. For further information
about starting the engine, see (
Ypage 151).
XTurn DYNAMIC SELECT controller :as
many times as necessary unt ilthe desired
driv e program isselected.
The selected drive program appears inthe
multifunction display. After five seconds
the disp lay goes out and the status icon of
the selected drive program appears.
The drive program indicator on DYNAMIC
SE LECT controller :lights up inred.
Available drive programs:
I Indivi dualIndividual settings
CComfortComfort-oriente d,opti-
mum-economy engine
and transmission settings
S Spo rtSporty engine and trans-
mission settings
S+ Sport PlusParticularly sporty trans-
mission settings
RaceMaximum sportiness and
engine and transmission
settings suitable for the
racetrack
Additional information for drive programs
(
Ypage 164).
You can also change gear yourself using the
steering wheel paddleshifters. For further
information on the manual drive program
(
Ypage 166).
158DYNAMIC SELECT controller (Mercedes-AMG vehicles)
Driving and parking

!Overfilling the fuel tank could damage the
fuel system.
!Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
!Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
Do not get into the vehicle again during the
refueling process. Otherwise, electrostatic
charge could build up again.
If you overfill the fuel tank, fuel could spray
out when the fuel pump nozzle is removed.
For further information on fuel and fuel quality (
Ypage 377).
Refueling
General information
The fuel filler flap is unlocked/locked auto-
matically when you unlock/lock the vehicle
with the SmartKey.
The position of the fuel filler cap is displayed
æ in the instrument cluster. The arrow on
the filling pump indicates the side of the vehi-
cle.
Opening the fuel filler flap
:To open the fuel filler flap
;Tire pressure table
=To insert the fuel filler cap
?Instruction label for fuel type to be refu-
eled
XVehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.
XVehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: open the driver's
door.
The on-board electronics now have status
0. This is the same as the SmartKey having
been removed.
XPress the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings up.
XTurn the fuel filler cap counterclockwise
and remove it.
XInsert the fuel filler cap into the holder on
the inside of fuel filler flap =.
XCompletely insert the filler neck of the fuel
pump nozzle into the tank, hook in place
and refuel.
XOnly fill the tank until the pump nozzle
switches off.
Do not add any more fuel after the pump
stops filling for the first time. Otherwise, fuel
may leak out.
Closing the fuel filler flap
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap.
Close the fuel filler flap before locking the
vehicle.
If you are driving with the fuel filler cap open,
the 8 reserve fuel warning lamp flashes. A
message appears in the multifunction display
(
Ypage 252).
In addition, the ;Check Engine warning
lamp may light up (
Ypage 275).
For further information on warning and indi-
cator lamps in the instrument cluster, see
(
Ypage 275).
170Refueling
Driving and parking

Electric parking brake
General notes
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstart the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The function of the electric parking brake is
dependent on the on-board voltage. If the on-
board voltage is low or there is a malfunction
in the system, it may not be possible to apply
the released parking brake.
XIf this is the case, only park the vehicle on
level ground and secure it to prevent it roll-
ing away.
XShift the automatic transmission to posi-
tion P.
It may not be possible to release an applied
parking brake if the on-board voltage is low or
there is a malfunction in the system. Contact a qualified specialist workshop.
The electric parking brake performs a func-
tion test at regular intervals while the engine
is switched off. The sounds that can be heard
while this is occurring are normal.
Applying or releasing manually
XTo engage: push handle :.
When the electric parking brake is applied, the red F(USA only) or !(Canada
only) indicator lamp lights up in the instru-
ment cluster.
The electric parking brake can also be
applied when the SmartKey is removed.
XTo release: pull handle:.
The red F(USA only) or !(Canada
only) indicator lamp in the instrument clus-
ter goes out.
The electric parking brake can only be
released:
Rwhen the SmartKey is in position 1or 2in
the ignition lock (
Ypage 149) or
Rif the ignition was switched on using the
Start/Stop button
Applying automatically
The electric parking brake is automatically
applied when the transmission is in position P
and:
Rthe engine is switched off or
Rthe driver is not wearing a seat belt and the
driver's door is opened.
To prevent the electric parking brake from
being automatically applied, pull handle :.
Parking173
Driving and parking
Z

Braking
Important safety notes
GWARNING
If you shift down on a slippery road surface in an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients
!On long and steep gradients, you must
reduce the load on the brakes by shifting to
a lower gear in good time. This allows you to
take advantage of the engine's braking
effect. For this, you need to have selected
manual drive program M. This helps you to
avoid overheating the brakes and wearing
them out excessively.
When you take advantage of the engine's
braking effect, a drive wheel may not turn
for some time, e.g. on a slippery road sur-
face. This could cause damage to the drive
train. This type of damage is not covered by
the Mercedes-Benz warranty.
Briefly depressing the accelerator pedal on
downhill gradients while the manual drive
program Mis temporarily activated: the auto-
matic transmission may switch to the last
active automatic drive program Eor S. The
automatic transmission may shift to a higher
gear. This can 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 overheat. 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 constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, 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 rain
without braking, there may be a delayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up
the brake discs, thereby drying them more
quickly and protecting them against corro-
sion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
RIn order to prevent any salt build-up, apply
the brakes occasionally while paying atten-
tion to the traffic conditions.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distance to the vehicle
ahead.
Driving tips177
Driving an d parking
Z

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
the multifunction display.
The brake fluid level may be too low due to
brake 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
only be carried out on a 2-axle dynamom-
eter. If you wish to operate the vehicle on
such a dynamometer, please consult a
qualified specialist workshop in advance.
You could otherwise damage the drive train
or the brake system.
!As the ESP®system operates automati-
cally, the engine and the ignition must be
switched off (the SmartKey must be in posi-
tion 0or 1in the ignition lock) if:
Rthe electric parking brake is tested on a
brake dynamometer (for a maximum of
ten seconds)
Rthe vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP
®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a quali-
fied specialist workshop.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the function-
ality of your brakes at regular intervals.
You can find a description of Brake Assist
(BAS) on (
Ypage 66).
Mercedes-Benz recommends that you only
have brake pads/linings installed on your vehicle which have been approved for
Mercedes-Benz vehicles or which correspond
to an equivalent quality standard. Brake
pads/linings which have not been approved
for Mercedes-Benz vehicles or which are not
of an equivalent quality could affect your vehi-
cle's operating safety.
Mercedes-Benz recommends that you only
use brake fluid that has been specially
approved for your vehicle by Mercedes-Benz,
or which corresponds to an equivalent quality
standard. Brake fluid which has not been
approved for Mercedes-Benz vehicles or
which is not of an equivalent quality could
affect your vehicle's operating safety.
Checking brake lining thickness
You can measure the break pad/lining thick- ness using a test gage. Color-coding (green or
red) on the test gage allows you to determine
whether the brake pad/lining thickness is still
sufficient. The test gage is in the vehicle docu-
ment wallet in the glove box.
Front wheel
178Driving tips
Driving and parking