warning lights MERCEDES-BENZ A-CLASS HATCHBACK 2018 Owner's Guide

Wa
rning and indicator lamps Overview of
warning and indicator lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some warning and indi‐
cator lamps may brief lylight up or flash. This
behaviour is non-critical. These warning and indi‐
cator lamps indicate a malfunction only if they
light up or flash af terth e engine has been star‐
te d or during a journe y.
Instrument display (standard) Instrument display in
the widescreen cockpit Depending on
the display setting, the positions
of the indicator lamps on the instrument display
may dif fer from theex ample shown.
Wa rning and indicator lamps:
L Low beam(→
page122)
T St
anding lights (→ page122)
K High beam(→
page124)
#! Tu
rn signal lights(→ page124)
R Re
ar fog light(→ page122)
6 Re
stra int sy stem(→ page549)
ü Seat belt not
fastened(→ page 554) J
Brakes (yellow)(
→page 549)
J Brakes (red)(
→page 549)
! Electric pa
rking brake (yellow)
(→ page 549)
! Electric pa
rking brake (red)
(→ page 549)
! ABS malfunctioning(→
page 549)
÷ ESP®
(→ page 549)
å ESP®
OFF( →page 549)
L Distance warning(→ page 555)
Ð Po
we r-assis tedsteering malfunction‐
ing( →page 555)
; Engine diagnosis (→
page 557)
% Preglow
# Elect
rical fault (→ page 557)
æ Fu
elreser vewith fuel filler flap loca‐
tion indicator (→ page 557)
? Ve
hicles with widescreen cock pit:
coolant too hot/cold (→ page 557)
h Ty
re pressure monitoring sy stem
(→ page 559) 548
Displaymessa ges and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Consult a qualified specialist workshop.
÷ ESP ®
wa rning lamp flashes The
yellow ESP ®
wa rning lamp flashes while theve hicle is in motion.
At least one wheel and tyre assembly has reached its traction limit (→ page186). #
Adapt your driving style to suit thero ad and weather conditions.
÷ ESP ®
wa rning lamp lights
up The
yellow ESP ®
wa rning lamp is lit while the engine is running.
ESP ®
is malfunctioning
Other driving sy stems and driving saf ety sy stems may also be malfunctioning. &
WARNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ryout vehicle stabilisation. In addition, other driving saf ety sy stems are
switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified specialist workshop. #
Drive on carefully. #
Obser vethe messages on the multifunction displa y. #
Consult a qualified specialist workshop. 552
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Drive on carefull y. #
Obser vethe messages on the multifunction displa y. #
Consult a qualified specialist workshop immediatel y.Seat belt
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
7 Seat belt warning lamp
lights up The
red seat belt warning lamp will light up once the engine has star ted.
In addition, a warning tone may sound.
The seat belt warning lamp reminds the driver and front passenger tofast entheir seat belts. #
Fasten your seat belt (→ page 35).
If yo u ha veplaced objects on the front passenger seat, the seat belt warning lamp may remain lit.
7 Seat belt warning lamp
fl ashes The
red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
The driver or front passenger has not fastened their seat belt while theve hicle is in motion. #
Fasten your seat belt(→ page 35).
There are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat. 554
Display messages and warning/indicator lamps

Driving sy
stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
L Wa rning lamp for dis tance
wa rning function The
red dis tancewarning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obs tacle at too high a speed. #
Be prepared tobrake immediatel y. #
Increase the dis tance.
Ac tive Brake Assi st . Ve
hicle Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ð Po we rst eering sy stem
wa rning lamp The
red po werst eering sy stem warning lamp is lit while the engine is running.
The po wer-assis tedsteering or thesteering itself is malfunctioning. &
WARNING Risk of accident if steering capability is impaired
If th esteering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do
not continue driving under any circums tances. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 555

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (→ page 425). #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below 120 °C. Ty
res Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
h Ty re pressure monitoring
sy stem warning lamp lights
up The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring sy stem has de tected tyre pressure loss in at least one of the tyres. &
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo llowing risks:
R The tyres may bur st, especially as the load and vehicle speed increase.
R The tyres may wearexc essively and/or une venly, which may greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. Display messages and
warning/indicator lamps 559

Fu
se box in the load compartment ...... 457
No tes ................................................... 454 G
Garage door opener Cleari ngthe memory ........................... 17 9
Opening or closing the door ................1 79
Programming buttons .......................... 176
Ra dio equipment appr oval numbers .... 17 9
Re solving problems ............................. 178
Synchronising thero lling code ............ .177
Gearshift recommendation .............164,167
Genera l operating permit number
(EU) .......................................................... .483
Genuine parts ............................................ 21
Glide mode ............................................... 167
Global sear ch
Fu nction .............................................. 300
Overview ............................................. 300
Glo vebox
Locking/unlocking .............................. 102 H
Handbrake see Electric parking brake
Handling characteristics (unusual) ....... 458
Hazard warning lights ............................ .125
Head restra int .......................................... .92
Fr ont (adjusting mechanically) .............. 92
Re ar (adjusting) .................................... .93
Re ar (fitting/removing) ........................ .93
Head-up display ....................................... 259
Ad justing display elements (on-board
compu ter) ............................................ 259
Ad justing the brightness (on-board
computer) ............................................ 259
Fu nction .............................................. 260
Menu (on-board compu ter) .................. 259
Operating the memory function ..........1 00
Setting the position (on-board com‐
puter) .................................................. 259
Headla mpflasher ................................... .124
Heating see Climate control High beam
Adaptive Highbeam Assist .................. .127
Ad aptive Highbeam Assist Plus .......... .128
Switching on/off ................................. 124
High-pressure cleaner (care) .................. 427
Hill Start Assist ........................................ 212
HOLD function ......................................... 212
Fu nction/no tes .................................... 212
Switching on/off ................................. 212
Home screen (media display) Overview ............................................. 282
Hotspot Setting up (Wi-Fi) ................................. 315 I
i-Size child seat securing sy stem ............ 48
Fitting .................................................... 49
No tes ..................................................... 48
Seats suitable for attaching ................... 59
Identification plate Engine ................................................. 483
Vehicle ................................................ 483 578
Index

Outside mir
rors ............................... 137, 13 8
Anti-dazzle mode (automatic) .............. 13 8
Au tomatic mir rorfo lding function ........ 14 0
Fo lding in/out .................................... .137
Operating the memory function ..........1 00
Pa rking position .................................. .139
Setting ................................................. 137
Overhead control panel Overview ................................................ 12
Owner's Manual Vehicle equipment ................................. 22
Owner's Manual (digital) ...........................18 P
Pa int code ................................................ 483
Pa intwork (cleaning instructions) .........429
Pa nic alarm ................................................ 66
Ac tivating/deactivating ......................... 66
Pa noramic sliding sunroof
see Sliding sunroof
Pa rk position
Inserting .............................................. 16 5
Selecting au tomatical ly....................... 16 5Pa
rking
see Electric parking brake
Pa rking (navigation service)
Pa ying parking charge s ....................... 365
Showing a parking option on the
map ..................................................... 365
Pa rking (service for navi gation)
No tes ................................................... 364
Selecting parking options .................... 364
Pa rking aid
see Parking Assist PARKTRONIC
Pa rking Assist PARKTRONIC ................... 214
Ac tivating ............................................ .217
Ad justing warning tones ...................... 217
Deactivating ......................................... 217
Fu nction ............................................... 214
Side impact pr otection .........................2 16
Sy stem limitations ...............................2 14
Pa rking assistance sy stems
see Active Parking Assist
Pa rking brake
see Electric parking brake
Pa rking lights .......................................... .122 Pa
rking position
Outside mir rors ................................... 13 9
St oring the position of the passenger
outside mir ror using reve rsege ar ........ 14 0
Pa rking up ................................................ 184
Pa rtition net
At tach ing ............................................ .107
PA SSENGER AIR BAGstatus display
see Automatic front passenger front
airbag shutoff
Pe destrian pr otection
see Active bonnet (pedestrian pr otection)
Pe rm issible axle load .............................. 483
Pe rm itted towing me thods .................... 449
Pe trol ........................................................ 486
Pe ts in the vehicle .................................... .63
Phone book see Contacts
PIN pr otection
Swit ching on/off .................................. 317
Plastic trim (Care) ................................... 434 Index
587

No
tes ................................................... 24 2
Overhang dimension ........................... 495
Soc ket ................................................. 24 4
To ngue weight .................................... .497
To wing capacity .................................. .496
Tr ailer operation
Ac tive Blind Spot Assi st....................... 238
Ac tive Lane Keeping Assist .................. 24 0
Bicycle rack ......................................... 24 5
Coupling up/uncoupling a trailer ........ .244
Fo lding the ball neck out/in ................2 42
No tes ................................................... 24 2
Soc ket ................................................. 24 4
Tr ailer stabilisation
Fu nction/no tes ................................... 189
Tr ansfer redve hicle data
Android Auto ....................................... 387
Apple CarPl ay™ ................................... 387
Baidu CarLife ....................................... 387
Tr ansmission (problem) ..........................16 8
Tr ansmission position display ................16 4
Tr anspo rting
Ve hicle ................................................ 452 Tr
im element (Care) ................................ 434
Tr ip
Menu (on-board computer) .................. 255
Tr ip computer
Displaying ............................................ 255
Re setting ............................................. 255
Tr ip distance ............................................ 255
Displaying ............................................ 255
Re setting ............................................. 255
Tr ip me ter
see Trip dis tance
Tu rn signal indicator
see Turn signal lights
Tu rn signal lights .....................................1 24
Changing bulbs (rear) .......................... 13 3
Switching on/off ................................. 124
Tw o phone mode
see Second telephone
Tw o-w ayradios
Fr equencies ......................................... 482
No tes on ins tallation ............................ 481
Tr ansmission output (maximum) ........ .482 Ty
re inflation compressor
see TIREFIT kit
Ty re pressure ........................................... 460
Checking (ty repressure monitoring
sy stem) ................................................ 461
No tes .................................................. 459
Re starting the tyre pressure loss
wa rning sy stem ................................... 467
Re starting the tyre pressure monitor‐
ing sy stem ...........................................4 62
TIREFIT kit .......................................... .440
Ty re pressure loss warning sy stem
(function) ............................................. 467
Ty re pressure monitoring sy stem
(function) ............................................. 461
Ty re pressure table .............................. 460
Ty re pressure loss warning sy stem
Fu nction .............................................. 467
Re starting ............................................ 467
Ty re pressure moni toring sy stem
Checking the tyre pressure .................. 461
Checking the tyre temp erature ............ 461
Fu nction ............................................... 461
Re starting ............................................ 462
Te ch nical da ta..................................... 463 Index
597

JBrake sy
stem warning lamp
(red) .................................................... 549
J Brake sy stem warning lamp
(yellow) ................................................ 551
?Coolant warning lamp ................ .558
#Electrical fault warning lamp ...... .557
; Engine diagnosis warning lamp .. .557
å ESP®
OFF warning lamp .............. 553
÷ESP ®
wa rning lamp flashes ........ .552
÷ESP ®
wa rning lamp lights up ...... .552
æFu elreser vewarning lamp .......... 557
ÐPo werst eering sy stem warning
lamp .................................................... 555
!Re d indicator lamp, elect ric
parking brake applied .......................... 551
6Re stra int sy stem warning lamp .. .553
7Seat belt warning lamp flashes .. .554
7 Seat belt warning lamp lights
up ........................................................ 554
ïTr ailertow hit chwarning lamp .... 556 hTy
repressure monitoring sys‐
te m wa rning lamp flashes .................. .560
hTy repressure monitoring sys‐
te m wa rning lamp lights up ................ .559
LWa rning lamp for dis tance
wa rning function ................................ .555
!Ye llow elect ric pa rking brake
indicator lamp is malfunctioning .......... 551
Wa rning/indicator lamps .......................548
Overview ............................................. 548
PA SSENGER AIR BAG ............................ .41
Wa rranty ....................................................26
Wa sher fluid
see Windsc reen washer fluid
Wa shing byhand (care) .......................... 428
Wa ter tank
see Air-water duct
We ather information ............................... 363
We b br owser
Calling up a web page .........................3 99
Calling up options ............................... 402 Calling up
the settings .........................4 02
Deleting a bookma rk........................... 402
Deleting Internet his tory ...................... 402
Ending ................................................. 402
Managing bookmar ks.......................... 402
Overview .............................................. 401
We bsite
Calling up ............................................ 399
Wheel change
Fitting a new wheel .............................. 475
Lo we ring theve hicle ............................4 76
Preparation .......................................... 472
Ra ising theve hicle ...............................4 73
Re moving a wheel ................................ 475
Re moving/fitting hub caps .................. 473
Wheel change
see Emergency spa rewheel
Wheel rotation ........................................ .471
Wheels Care .................................................... 432
Changing hub caps .............................. 473
Checking ............................................ .458
Che cking the tyre pressure (tyre
pressure monitoring sy stem) ............... 461 600
Index