2017 MERCEDES-BENZ GLA-Class brake

Safety systems
ProblemPossible causes/consequences andMSolutions
J
The yellow brake sys-
tem warning lamp
lights up while the
engine is running.The brake system is malfunctioning.
GWARNING
The braking characteristics may be affected.
There is a risk of an accident.
XDrive on taking extra care.
XVisit a qualified specialist workshop immediately.
$(USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the engine is run-
ning. A warning tone
also sounds.GWARNING
The brake boosting effect is malfunctioning and the braking char-
acteristics may be affected.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
XSecure the vehicle against rolling away (Ypage 171).
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction
display.
$ (USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the engine is run-
ning. A warning tone
also sounds.There is not enough brake fluid in the brake fluid reservoir.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
XSecure the vehicle against rolling away (Ypage 171).
XDo not add brake fluid. Adding more will not remedy the mal-
function.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction
display.
268Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
!
The yellow ABS warning
lamp is lit while the
engine is running.ABS (Anti-lock Braking System) is deactivated due to a malfunc-
tion. Therefore, BAS (Brake Assist), COLLISION PREVENTION
ASSIST PLUS, ESP
®(Electronic Stability Program), the HOLD func-
tion and hill start assist are also deactivated, for example.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is faulty, there is also a possibility that other
systems, such as the navigation system or the automatic trans-
mission, will not be available.
Warning and indicator lamps in the instrument cluster269
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
!
The yellow ABS warning
lamp is lit while the
engine is running.ABS is temporarily unavailable. Therefore, BAS, COLLISION PRE-
VENTION ASSIST PLUS, ESP®, EBD (electronic brake force distri-
bution), the HOLD function and hill start assist are also deactiva-
ted, for example.
Possible causes are:
RSelf-diagnosis is not yet complete.
RThe on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is a risk of an accident.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
270Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
!
The yellow ABS warning
lamp is lit while the
engine is running. A
warning tone also
sounds.EBD is malfunctioning. Therefore, ABS, BAS, COLLISION PREVEN-
TION ASSIST PLUS, ESP®, the HOLD function and hill start assist
for example, are also not available.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
$ (USA only)
J (Canada only)
!֌
The red brake system
warning lamp and the
yellow ABS, ESP
®and
ESP®OFF warning
lamps are lit while the
drive system is running.
ABS and ESP®are malfunctioning. Therefore, BAS, COLLISION
PREVENTION ASSIST PLUS, EBD, the HOLD function and hill start
assist for example, are also not available.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster271
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
֌
The yellow ESP
®and
ESP®OFF warning
lamps are lit while the
engine is running.
ESP®, BAS, COLLISION PREVENTION ASSIST PLUS, the HOLD
function and hill start assist are not available due to a malfunction.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
֌
The yellow ESP
®and
ESP®OFF warning
lamps are lit while the
engine is running.
ESP®, BAS, the HOLD function and hill start assist are temporarily
unavailable.
COLLISION PREVENTION ASSIST PLUS may also have failed.
ATTENTION ASSIST is deactivated.
Self-diagnosis is not yet complete.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster273
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
F(USA only)
! (Canada only)
The red indicator lamp
for the electric parking
brake flashes or lights
up and/or the yellow
warning lamp for the
electric parking brake
lights up.XObserve the additional display messages in the multifunction
display.
6
The red restraint sys-
tem warning lamp is lit
while the engine is run-
ning.The restraint system is faulty.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig-
gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XContact a qualified specialist workshop and have the restraint
system checked.
For further information about the restraint system, see
(
Ypage 42).
274Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
XLeave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning
notes (
Ypage 311).
XIf you have to add coolant frequently, have the engine cooling
system checked.
XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XAt coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic.
Driving systems
ProblemPossible causes/consequences and MSolutions
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
A warning tone also
sounds.You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
For further information about the distance warning function of
COLLISION PREVENTION ASSIST PLUS, see (
Ypage 66).
Warning and indicator lamps in the instrument cluster277
On-board computer and displays
Z

Displaying service messages
XSwitchon th eignition .
XPress th e= or; buttonto selec tth e
Serv.
menu.
XPress th e9 or: buttonto selec tth e
ASSYST PLU S
submenuand confirm by
pressing th ea button.
The servic edue dat eappears in th emulti-
function display.
Information about Service
Resetting th eASSYS TPLUS service
interva ldisplay
!If th eASSYST PLU Sservic einterval dis -
play has been inadvertentl yreset ,this set -
ting can be correcte dat aqualified special-
ist workshop .
Hav eservic ewor kcarrie dout as described
in th eMaintenance Booklet .Thi smay oth-
erwise lead to increase dwear and damage
to th emajor assemblies or th evehicle.
A qualified specialis tworkshop ,e.g. an
authorized Mercedes-Ben zCenter, will reset
th eASSYST PLU Sservic einterval display
after th eservic ewor khas been carrie dout .
You can also obtain further information on
maintenance work, fo rexample.
Specia lservice requirement s
The specifiedmaintenance interval take sonly
th enormal operation of th evehicle into
account. Under arduous operatin gcondition s
or increase dload on th evehicle, mainte -
nance wor kmus tbe carrie dout more fre-
quently, fo rexample:
Rregular city drivin gwit hfrequent intermedi-
at estops
Rif th evehicle is primarily used to trave l
short distances
Ruse in mountainous terrain or on poo rroad
surfaces
Rif th eengin eis ofte nlef tidlin gfo rlon gperi-
ods
Under these or similar conditions, have, fo r
example, th eair filter, engin eoil and oil filte r
replaced or changed more frequently. Under
arduous operatin gconditions, th etires mus t
be checke dmore often. Further information
can be obtained at aqualified specialist work-
shop, e.g. an authorized Mercedes-Ben zCen -
ter.
Drivin gabroad
An extensive Mercedes-Ben zServic enetwor k
is also available in other countries. You can
obtain further information from any author -
ized Mercedes-Ben zCenter.
Car e
General notes
HEnvironmental not e
Dispose of empty packagin gand cleanin g
cloths in an environmentally responsible man -
ner.
!Fo rcleanin gyour vehicle, do no tuse any
of th efollowing :
Rdry, rough or har dcloths
Rabrasiv ecleanin gagents
Rsolvents
Rcleanin gagents containin gsolvents
Do no tscrub .
Do no ttouch th esurfaces or protective
films wit hhar dobjects ,e.g. arin gor ic e
scraper. You could otherwise scratch or
damage th esurfaces and protective film.
!Do no tpar kth evehicle fo ran extended
period straight after cleanin git,particularly
after havin gcleaned th ewheels wit hwhee l
cleaner. Wheel cleaners could caus e
increase dcorrosion of th ebrake discs and
brake pads/linings. Fo rthis reason ,you
Care313
Maintenance and care
Z