engine coolant MERCEDES-BENZ A-CLASS HATCHBACK 2018 User Guide

Display messages
Possible causes/consequences and M
MSolutions
# See Owner's Manual *T
he battery is not being charge d.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. #
Consult a qualified specialist workshop.
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* NO
TEEngine dama gedue toinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Add coolant (→ page 425).
? *T
hefan mo tor is defective. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
# *T
he battery charge leve l is too lo w. #
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. 522
Display messa ges and warning/indicator lamps

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
? Coolant warning lamp The
red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120 °C. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. Do not con‐
tinue driving under any circums tances. #
Obser vethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: #
Consult a qualified specialist workshop. 558
Display messages and warning/indicator lamps

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

Ac
tivating/deactivating the synchro‐
nisation function (multimedia sys‐
te m) ..................................................... 14 4
Air di stribution settings .......................1 43
Air-recirculation mode ......................... 14 4
Au tomatic control ................................ 14 3
Defrosting the windscreen ...................1 41
Demi sting windo ws............................. 14 4
Fr ont air vents ..................................... 14 9
No te ..................................................... 141
Re ar air vents ...................................... 15 0
Re sidual heat ....................................... 14 4
Sets the air flow .................................... 141
Setting (multimedia sy stem) ................1 43
Setting the air distribution ...................1 41
Setting thete mp erature ....................... 141
St ationary heater/ ventilation .............. 14 4
Switching on/off ................................. 14 2
Switching there ar wind owheater
on/off .................................................. 141
THERMATIC contro l panel .................... 141
THERMOTRONIC contro l panel ............141
Ve ntilating theve hicle (con venience
opening) ................................................ 77
Coat hook on the tailgate ...................... .109 Cock
pit......................................................... 6
Overview ................................................. 6
Co ffee cup symbol
see ATTENTION ASSIST
Combination switch ................................124
Compass .................................................. 362
Compu ter
see On-board computer
Connection status
Displ aying ............................................ 399
Overview ............................................ .399
Connectivity Switching transmission of theve hicle
position on/off .................................... 313
Contacts .................................................. .374
Calling up ............................................ 375
Del eting .............................................. .377
Del eting favo urites .............................. 377
Downloading (from mobile phone) ....... 375
Importing ............................................. 376
Importing (o verview) ............................ 376
Information ..........................................3 74
Making a call ....................................... 376Na
me form at ...................................... .375
Options ................................................ 376
Saving as a favo urite .......................... .377
Selecting options for suggestions ........ 377
St oring .................................................3 76
Con venience closing ................................. 78
Con venience opening ................................ 77
Coolant (engine) Check le vel .......................................... 425
No tes .................................................. 492
Cooling see Climate control
Co pyright ...................................................29
Cornering light ........................................ .126
Cross Traf fic Alert .................................. .231
Crosswind Assist Function/no tes ................................... 189
Cruise control .......................................... 19 6
Ac tivating ............................................ 19 8
Buttons ................................................ 19 8
Calling up a speed .............................. .198
Deactivating ........................................ 19 8
Fu nction .............................................. 19 6568
Index

Ad
aptive Highbeam Assist cur rently
una vailable See Owner's Manual .........547
Ad aptive Highbeam Assist inopera‐
tive ...................................................... 547
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .547
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .547
¯ AdBlue sy stem fault Engine
st art not possible ................................ 527
¯Ad Blue system fault Perf.
re duced in XXX miles See Owner's
Manual ................................................ 527
¯ AdBlue sy stem fault See Own‐
er's Manual ........................................ .527
4 Add 1 litre engine oil when next
re fuelling ............................................. 525
Anti-theft ala rmsystem Malfunction ...545 App
lybrake todeselect Park (P)
position ...............................................5 38
Apply brake toselect R ........................ 537
ÀAT TENTION ASSIST inoperative ...51 5
À ATTENTION ASSIS T:Take a
break! .................................................. 514
b Automatic driving lights inoper‐
ative .................................................... 547
Au xilia rybattery malfunction .............. 535
_Before starting the engine, turn
th esteering wheel. .............................. 542
Blind Spot Assi stcur rently una vaila‐
ble See Owner's Manual ......................512
Blind Spot Assi stinope rative ............... 513
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...5 15
Brake immediately ............................... 499
ÂChange key bat teries .................. 534
JCheck brake fluid le vel................ 504 ïCheck trailer hitch lock (white
display message) ................................ .539
hChe cktyre(s) ............................... 529
!Clean the fuel filter .................... .520
Clutch overheated Avoid pulling away
fo r XX:XX mins ................................... .536
?Coolant Stop vehicle Switch
engine off ............................................ 520
Cruise contro l and Limiter inope ra‐
tive ....................................................... 519
Cruise cont rol inope rative .................... 519
Cruise cont rol off ................................ .518
Cur rently una vailable Camera view
re stricted ............................................. 517
Cur rently una vailable Radar sensors
dirty .....................................................5 16
! currently una vailable See Own‐
er's Manual ........................................ .505
÷cur rently una vailable See Own‐
er's Manual ........................................ .499 Index
571

hRe
ctify tyre pressure ................... 530
Re duce speed ...................................... 532
ØRe fill Ad Blue Engine start not
possible .............................................. .526
ØRe fill Ad Blue See Owne r’s Man‐
ual .......................................................5 25
!Re lease parking brake .................503
¸Re place air cleaner ...................... 521
,Re placekey See Owner's Man‐
ual ...................................................... .534
ÂRe placekey ................................ .533
æRe servefuel le vel........................ 524
6Re stra int sys. malfunction Con‐
sult workshop ...................................... 507
Re versing not poss. Consult work‐
shop ....................................................5 38
Risk of vehicle rolling away Apply
pa rking brake See Owner's Manual .....5 39 Risk of
vehicle rolling away Parking
brake not applied See Owner's Man‐
ual ...................................................... .504
Risk of vehicle rolling Driver door
open and transmission not in P ...........541
# See Owner's Manual ................... 522
Speed limit (winter tyres) XXX km/h ...519
Ð Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual ....542
Ð Steering malfunction See Own‐
er's Manual .......................................... 541
Ð Steering malfunction Stop
immediately See Owner's Manual .......542
#St opvehicle Lea veengine run‐
ning ..................................................... 522
#St opvehicle See Owner's Man‐
ual .......................................................5 21
ç suspended ................................... 51 8
b Switch off lights .......................... 546
b Switch on headlamps ..................546Te
aching in transmission comple te...... 537
Te aching in transmission Operate
selec tor le ver Brake for XX seconds
Risk of vehicle rolling .......................... 535
To shift out of P or N,depress brake
and start engine .................................. 537
To p up coolant See Owner ’sManual ... 522
¥To p upwasher fluid .................... .545
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ......................51 5
Tr af fic Sign Assi stinope rative .............. 514
ï Trailer coupling extending… ......... 535
Tr ans. oil overheated Drive on with
care ..................................................... 537
Tr ansmission Malfunction ....................541
Tr ansmission Malfunction Stop ........... 535
Tr ansmission Malfunction Visit work‐
shop ....................................................5 37
! Turn on the ignition torelease
th e parking brake ................................ 500 Index
573

No
n-operational time
Ac tivating/deactivating standby
mode .................................................. .184
St andby mode function ...................... .184
No tifications Centre ................................ 298
Calling up a notification ...................... .299
Editing a notification ........................... 299
Global sea rch ...................................... 300
Noti fication types ................................ 298
Overview ............................................. 298
Selecting actions for a notification ..... .299
Using theglobal sear ch....................... 300 O
Occupant saf ety
Pe ts in theve hicle ................................. 63
Occupant saf ety
see Airbag
see Automatic front passenger front
airbag shutoff
see PRE-SAFE ®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) see
Restra int sy stem
see Seat belt
Odome ter
see Total dis tance
Oil see Engine oil
On-board co mputer ................................. 250
Assis tant displ aymenu ........................ 254
Displaying the service due date ........... 419
Head-up display menu ........................ .259
Media menu ........................................ 258
Menu designs ...................................... 251
Menu overview .................................... 250
Multifunction display .......................... .253
Na vigation menu ................................. 256
Operating ............................................ 250
Ra dio menu .........................................2 57
Service menu ...................................... 254
Te lephone menu .................................. 258
Tr ip menu ............................................ 255
On-boa rddiagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .481 No
tes ................................................... 481
Tw o-w ayradios .................................... 481
Open-source software .............................. 29
Operating fluids
Ad Blue ®
............................................... 489
Ad ditives (fuel) .................................... 487
Brake fluid .......................................... .492
Coolant (engine) .................................. 492
Engine oil ............................................ 490
Fu el (diesel) ......................................... 488
Fu el (petrol) ......................................... 486
No tes .................................................. 485
Wi ndsc reen washer fluid .................... .493
Operating saf ety
Declaration of Conformity (electro‐
magnetic compatibility) ........................ .23
Declaration of conformity (ja ck) ............ 23
Declaration of con form ity (TIREFIT kit) .. 24
Declaration of conformity (wireless
ve hicle components) ............................. 23
Information ............................................ 22
Operating sy stem
see On-board computer 586
Index

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