ECU MERCEDES-BENZ GLA-Class 2017 X156 Repair Manual

Stowage compartment in front of the arm-
rest (vehicles with automatic transmis-
sion)
XTo open:press the marking on cover :.
iYou can remove the non-slip mat and the
insert for cleaning. When removing the
insert you will have to overcome some
slight resistance.
Stowage compartment under the armrest
XTo open: on vehicles with movable armr-
ests, make sure that the armrest is in the
rearmost position.
XPress button :and fold the armrest up.
Depending on the vehicle equipment, the
armrest can be moved backwards or forwards
in a longitudinal direction.
Depending on the vehicle's equipment, the
following may be in the stowage compart-
ment: a multimedia connector unit with an SD
card slot and 2 USB ports, e.g. for use with an
iPod
®, iPhone®or MP3 player; see the sepa-
rate operating instructions. Stowage compartment under the driver's
seat and front-passenger seat
GWARNING
If you exceed the maximum load for the stow- age compartment, the cover may not be able
to restrain the items. Items may be thrown out
of the stowage compartment and hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Never exceed the maximum permissible load
for the stowage compartment. Stow and
secure heavy objects in the cargo compart-
ment.
The maximum permissible load of the stow-
age compartment is 2.6 lbs (1.5 kg).
XTo open: pull handle :up and fold
cover ;forwards.
Stowage space in the rear
Stowage compartment in the rear center
console
282Stowage areas
Stowage and features

XInsert the seat belt into seat-belt holder:.
Folding the rear seat backrest back
!Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be dam-
aged.
XMove the driver's or front-passenger seat
forward if necessary.
XFold seat backrest :back until it engages.
Red lock status indicator ;is no longer
visible.
XAdjust the head restraints if necessary
(
Ypage 106).
XMove the driver's or front-passenger seat
back if necessary.
Adjusting the angle of the rear seat backr-
ests (cargo position)
Vehicles with the cargo compartment pack-
age: to enlarge the cargo compartment, you
can adjust the rear seat backrests to a 15°
steeper angle (cargo position).
XFold the seat backrest forward
(
Ypage 284).
XMove handle :in the direction of the
arrow.
XPush back seat backrest ;as far as han-
dle :until the backrest engages.
The backrest is now in the cargo position.
Securing cargo
Cargo tie-down rings
General notes
Observe the following notes on securing
loads:
RObserve the loading guidelines
(
Ypage 280).
RSecure the load using the cargo tie-down
rings.
RDistribute the load on the cargo tie-down
rings evenly.
RDo not use elastic straps or nets to secure
a load, as these are only intended as an
anti-slip protection for light loads.
RDo not route tie-downs across sharp edges or corners.
RPad sharp edges for protection.
Cargo compartment
:Cargo tie-down rings
Stowage areas285
Stowage and features
Z

Bag hook
GWARNING
The bag hooks cannot restrain heavy objects
or items of luggage. Objects or items of lug-
gage could be flung around and thereby hit
vehicle occupants when braking or abruptly
changing directions. There is a risk of injury.
Only hang light objects on the bag hooks.
Never hang hard, sharp-edged or fragile
objects on the bag hooks.
!The bag hook can bear a maximum load of
6.6lbs (3kg) and should not be used to
secure a load.
:Bag hook
Parcel shelf
!
The maximum load which may be placed
on the parcel shelf is 3.3 lbs (1.5 kg).
XTo remove: detach straps :from the tail-
gate.
XFold the parcel shelf downwards.
XPull the parcel shelf out to the rear ;.
XTo install:place the parcel shelf on the
guide rails on the left and right.
XPush the parcel shelf evenly forwards using both hands until it engages.
XFold the parcel shelf up.
XAttach straps :to the tailgate.
Cargo net
Important safety notes
GWARNING
On its own, the cargo net cannot secure or
restrain heavy objects, items of luggage and
heavy loads. You could be hit by an unsecured
load during sudden changes in direction,
braking or in the event of an accident. There is
an increased risk of injury or even fatal injury.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping over, e.g. by
using tie downs, even if you are using the
cargo net.
It is important to use a cargo net if you load
the vehicle with small objects above the seat
backrests. For safety reasons, always use a
cargo net when transporting loads.
Damaged cargo nets can no longer fulfill their
protective function and must be replaced.
Visit a qualified specialist workshop.
Attaching and tightening the cargo net
You have two options for hooking in the cargo
net:
Rwith cargo compartment enlargement: the
brackets are behind the B‑pillar and the
cargo tie-down rings to tension the net are
on the sides of the rear-compartment foot-
well.
Rwithout cargo compartment enlargement:
the brackets are behind the C-pillar and the cargo tie-down rings to tension the net are
in the cargo compartment (
Ypage 285).
286Stowage areas
Stowage and features

XUsing handle:, swing the cargo compart-
ment floor upwards as far as side flaps =,
then overcome the resistance of flaps =.
XPlace the cargo compartment floor on side
flaps=.
Roof carrier
Important safety notes
GWARNING
When you load the roof, the center of gravity
of the vehicle rises and the driving character-
istics change. If you exceed the maximum roof
load, the driving characteristics, as well as
steering and braking, will be greatly impaired.
There is a risk of an accident.
Never exceed the maximum roof load and
adjust your driving style.
!Mercedes-Benz recommends that you
only use roof carriers that have been tested
and approved for Mercedes-Benz vehicles.
This helps to prevent damage to the vehi-
cle.
Position the load on the roof rack in such a
way that the vehicle will not sustain dam-
age even when it is in motion.
Ensure that, depending on the vehicle's
equipment, you can raise the panorama
roof with power tilt/sliding panel fully and
open the tailgate fully when the roof carrier is installed. You will find information on the maximum roof
load in the "Technical data" section
(
Ypage 383).
An incorrectly secured roof carrier or roof
load may become detached from the vehicle.
You must therefore ensure that you observe
the roof carrier manufacturer's installation
instructions.
Attaching the roof carrier
XSecure the roof carrier to the roof rails. In
doing so, observe the manufacturer's
installation instructions.
Features
Cup holder
Important safety notes
GWARNING
The cup holder cannot hold a container secure
whilst traveling. If you use a cup holder whilst
traveling, the container may be flung around
and liquid may be spilled. The vehicle occu-
pants may come into contact with the liquid
and if it is hot, they may be scalded. You may
be distracted from the traffic conditions and
you could lose control of the vehicle. There is a risk of an accident and injury.
Only use the cup holder when the vehicle is
stationary. Only use the cup holder for con-
tainers of the right size. Always close the con-
tainer, particularly if the liquid is hot.
GWARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants.
There is a risk of injury, particularly in the
event of sudden braking or a sudden change
in direction.
288Features
Stowage and features

RAlways stow objects so that they cannot be
thrown around in such situations.
RAlways make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets.
RClose the lockable stowage spaces before
starting a journey.
RStow and secure objects that are heavy,
hard, pointed, sharp-edged, fragile or too
large in the cargo compartment.
!Only use the cup holders for containers of
the right size and which have lids. The
drinks could otherwise spill.
Observe the loading guidelines (
Ypage 280).
The stowage compartments in the doors pro-
vide space for bottles:
Rfront: capacity up to 34 fl. oz. (1.0 l)
Rrear: capacity up to 17 fl. oz. (0.5 l)
Cup holder in the front-compartment
center console
The cup holder and the rubber mat under-
neath can be removed for cleaning. Clean
them with clean, lukewarm water only.
XTo remove:carefully pull in upper sections
of cup holder :on the driver's and front-
passenger sides until they release.
XLift the cup holder upwards ;until it can
be removed.
XTo install: insert cup holder into lateral
curved sections ;in the stowage com-
partment. Insert the cup holder so that the wedge of the upper section of cup
holder :faces forwards.
XPress the cup holder downwards until it
engages on the right and left-hand sides.
Cup holder in the rear seat armrest
!Do not sit on or support your body weight
on the rear seat armrest when it is folded
down, as you could otherwise damage it.
!Close the cup holder before folding the
rear seat armrest up. Otherwise, the cup
holder could be damaged.
XFold down the rear seat armrest.
XTo open: press the front of cup holder :
or ;.
Cup holder :or; extends automatically.
XTo close: slide cup holder :or; back
until it engages.
Features289
Stowage and features
Z

System self-test
After you have switched on the ignition, the
system carries out a self-diagnosis.
A malfunction in the system has been detec-
ted if one of the following occurs:
RThe indicator lamp in the SOS button doesnot come on during the system self-test.
RThe indicator lamp in the FRoadside
Assistance button does not light up during
self-diagnosis of the system.
RThe indicator lamp in the ïMB Info call
button does not light up during self-diag-
nosis of the system.
RThe indicator lamp in one or more of the
following buttons continues to light up red
after the system self-diagnosis:
-SOS button
-F Roadside Assistance call button
-ïMB Info call button
RAfter the system self-diagnosis, the Inop‐
erativeorService Not Activated
message appears in the multifunction dis-
play.
If a malfunction is indicated as outlined
above, the system may not operate as expec-
ted. In the event of an emergency, help will
have to be summoned by other means.
Have the system checked at the nearest
authorized Mercedes-Benz Center or contact
the following service hotlines:
RUSA: Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
(1-800-367-6372) or 1-866-990-9007
RCanada: Customer Service at
1-888-923-8367
Emergency call
Important safety notes
GWARNING
It can be dangerous to remain in the vehicle,
even if you have pressed the SOS button in an emergency if:
Ryou see smoke inside or outside of the vehi-
cle, e.g. if there is a fire after an accident
Rthe vehicle is on a dangerous section of
road
Rthe vehicle is not visible or cannot easily beseen by other road users, particularly when
dark or in poor visibility conditions
There is a risk of an accident and injury.
Leave the vehicle immediately in this or simi-
lar situations as soon as it is safe to do so.
Move to a safe location along with other vehi-
cle occupants. In such situations, secure the
vehicle in accordance with national regula-
tions, e. g. with a warning triangle.
You must have a license agreement to acti-
vate the mbrace service. Make sure that your
system is activated and operational. To reg-
ister, press the ïMB Info call button. If
any of the steps mentioned are not carried
out, the system may not be activated.
If you have questions about the activation,
contact one of the following telephone hot-
lines:
RUSA: Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
(1-800-367-6372) or 1-866-990-9007
RCanada: Customer Service at
1-888-923-8367
General notes
An emergency call is dialed automatically if an air bag or Emergency Tensioning Device is
triggered.
iYou cannot end an automatically trig-
gered emergency call yourself.
An emergency call can also be initiated man-
ually.
Features293
Stowage and features
Z

the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats and do not place floormats on
top of one another.
XSlide the seat backwards.
XTo install:place the floormat in the foot-
well.
XPress safety catch knobs :onto retain-
ers ;.
XTo remove: pull the floormat off retain-
ers ;.
XRemove the floormat.
Features305
Stowag ean d features
Z

Example: engine oil cap
XTurn cap:counter-clockwise and remove
it.
XAdd engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 l)of
engine oil.
XReplace cap :on the filler neck and turn
clockwise.
Ensure that the cap locks into place
securely.
XCheck the oil level again with the oil dip-
stick (
Ypage 310).
Further information on engine oil
(
Ypage 379).
Checking and adding other service
products
Checking coolant level
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
!The coolant may only be checked and cor-
rected when the engine is cool (coolant
temperature below 104 ‡ (40 †). Check-
ing the coolant when the coolant tempera-
ture is above 104 ‡ (40 †) may result in
damage to the engine or to the engine cool-
ing system.
Example
XPark the vehicle on a level surface.
Only check the coolant level when the vehi-
cle is on a level surface and the engine has cooled down.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 149).
XCheck the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
104 ‡ (40 †).
XTurn the SmartKey to position 0in the igni-
tion lock (
Ypage 149).
XSlowly turn cap :counter-clockwise and
to relieve excess pressure.
XTurn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.
XIf necessary, add coolant that has been tes-
ted and approved by Mercedes-Benz.
XReplace cap:and turn it clockwise as far
as it will go.
For further information on coolant, see
(
Ypage 381).
Windshield washer system
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Engine compartment311
Maintenance and care
Z

ces prevent water from draining away. This
can lead to corrosion damage and damage
to electronic components.
XClean the inside and outside of the win-
dows with a damp cloth and a cleaning
product that is recommended and
approved by Mercedes-Benz.
Cleaning wiper blades
GWARNING
You could become trapped by the windshield wipers if they start moving while cleaning the
windshield or wiper blades. There is a risk of
injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield or
wiper blades.
!Only fold the windshield wipers away from
the windshield when vertical. Otherwise,
you will damage the hood.
!Do not pull the wiper blade. Otherwise,
the wiper blade could be damaged.
!Do not clean wiper blades too often and
do not rub them too hard. Otherwise, the
graphite coating could be damaged. This
could cause wiper noise.
!Hold the wiper arm securely when folding
back. The windshield could be damaged if
the wiper arm smacks against it suddenly.
XFold the windshield wiper arms away from
the windshield.
XCarefully clean the wiper blades with a
damp cloth.
XFold the windshield wiper arms back again
before switching on the ignition.
Cleaning the exterior lighting
!Only use cleaning agents or cleaning
cloths which are suitable for plastic light
lenses. Unsuitable cleaning agents or
cleaning cloths could scratch or damage
the plastic light lenses.
XClean the plastic lenses of the exterior
lights with a wet sponge and a mild cleaning
agent, e.g. Mercedes-Benz car shampoo or cleaning cloths.
Cleaning the mirror turn signals
!Only use cleaning agents or cleaning
cloths that are suitable for plastic lenses.
Unsuitable cleaning agents or cleaning
cloths could scratch or damage the plastic lenses of the mirror turn signals.
XClean the plastic lenses of the mirror turn
signals in the exterior mirror housing usinga wet sponge and mild cleaning agent, e.g.
Mercedes-Benz car shampoo or cleaning
cloths.
Cleaning the sensors
!If you clean the sensors with a power
washer, make sure that you keep a dis-
tance of at least 11.8 in (30 cm) between
the vehicle and the power washer nozzle.
Information about the correct distance is
available from the equipment manufac-
turer.
XClean sensors :of the driving systems
with water, car shampoo and a soft cloth.
Care317
Maintenance and care
Z

Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory.
It is therefore recommended that you addi-
tionally equip your vehicle with a TIREFIT kit ifyou mount tires that do not feature run-flat
properties, e.g. winter tires. A TIREFIT kit may
be obtained from a qualified specialist work-
shop.
Information on changing and mounting
wheels (
Ypage 363).
XStop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
XSwitch on the hazard warning lamps.
XSecure the vehicle against rolling away
(
Ypage 171).
XIf possible, bring the front wheels into the
straight-ahead position.
XSwitch off the engine.
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.
XVehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: remove the Start/
Stop button from the ignition lock
(
Ypage 149).
XMake sure that the engine cannot be star-
ted via your smartphone (
Ypage 171).
XMake sure that the passengers are not
endangered as they do so. Make sure that
no one is near the danger area while a
wheel is being changed. Anyone who is not directly assisting in the wheel change
should, for example, stand behind the bar-
rier.
XGet out of the vehicle. Pay attention to traf-
fic conditions when doing so.
XClose the driver's door.
MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires. The affected
tire must not show any clearly visible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking next to the tire size designation, the load-
bearing capacity and the speed index
(
Ypage 357).
MOExtended tires may only be used in con-
junction with an active tire pressure loss
warning system or with an active tire pressure
monitor.
If a pressure loss warning message
appears in the multifunction display:
Robserve the instructions in the display mes-
sages (
Ypage 258).
Rcheck the tire for damage.
Rif driving on, observe the following notes.
The driving distance possible in run-flat mode
is approximately 50 miles (80 km) when the
vehicle is partially laden. When the vehicle is
fully laden it is approximately 19 miles
(30 km).
In addition to the vehicle load, the driving dis-
tance possible depends upon:
Rvehicle speed
Rroad condition
Routside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving condi-
tions or maneuvers, or it can be increased
through a moderate style of driving.
The driving distance possible in run-flat mode
is counted from the moment the tire pressure loss warning appears in the multifunction dis-
play.
Flat tire323
Breakdown assistance