MERCEDES-BENZ A-CLASS SALOON 2018 Owners Manual

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.
Fu nction of Active Brake Assi st .Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
; Engine diagnosis warning
lamp The
yellow engine diagno stics warning lamp is lit while the engine is running.
A malfunction has occu rred in the engine, theex haust sy stem or the fuel sy stem.
The emissions limit value may ha vebeen exceeded and the engine may be running in eme rgency operation mode. #
Have theve hicle checked as soon as possible at a qualified specialist workshop.
Ve hicles with a diesel engine: the fuel tank may ha vebeen run dr y. 568
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Start the engine thre eto four times af terre fuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency operation mode is cancelled. The vehicle need not
be checked.
æ Fu elreser ve wa rning lamp The
yellow fuel reser ve wa rning lamp lights up while the engine is running.
The fuel supp lyhas dropped into there ser verange. #
Refuel.
#
Electrical fault warning
lamp The
red elect rical fault warning lamp is lit.
There is a fault in the electrics. #
Obser vethe messages on the multifunction displa y.
?
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. Displ
aymessa ges and warning/indicator lamps 569

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions &
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.
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (/ page 435). #
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. 57 0
Displaymessa ges and warning/indicator lamps

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. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle, paying attention toroad and traf fic conditions. #
Check the tyre pressure and the tyres.
h The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) flashes for appro ximately one
minu teand then remains lit.
The tyre pressu remonitoring sy stem is faulty. Display messages and
warning/indicator lamps 571

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ty re pressure monitoring
sy stem warning lamp
fl ashes &
WARNING Thereis a risk of an accident if the tyre pressure monitoring sy stem is malfunctioning
If th e tyre pressure monitoring sy stem is malfunctioning, it is not able toissue a warning if there is pressure loss in
one or more of the tyres.
Ty res with insuf ficient tyre pressure ma y,forex ample, af fect theve hicle's handling characteristics, steering and
braking. ‑ #
Have the tyre pressure monitoring sy stem checked at a qualified specialist workshop. #
Consult a qualified specialist workshop. 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. 572
Displaymessa ges and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Consult a qualified specialist workshop. #
Obser vethe messages on the multifunction displa y.
ï
Tr ailer tow hit chwarning
lamp The
red trailer tow hit chwarning lamp is on.
The trailer tow hit chis not operational or swivels. &
WARNING Risk of an accident if the ball neck is not loc ked
If th e ball neck is not in the loc ked position, the trailer may come loose. #
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. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedure and do not re-couple the trailer until the display message disappears. #
Obser vethe messages on the multifunction displa y.
If th e trailer hitch swivels: #
Wait until the ball coupling has reached the operational position. Display messages and
warning/indicator lamps 573

1,
2, 3 ...
12 V battery
see Battery (vehicle)
12 V so cket
see Soc ket (12 V)
11 5 V soc ket
see Soc ket (1 15 V)
230 V soc ket
see Soc ket (230 V)
360° Camera ........................................... 226
Ca re .................................................... 442
Fu nction .............................................. 226
Opening the camera co ver (r eve rsing
camera) .............................................. .230
Selecting a view .................................. 230
Setting favo urites ................................ 230
Swit ching automatic operation
on/off (r eversing camera) .................. .230 A
A/C function Activating/deactivating (multimedia
sy stem) ................................................ 147Switching on/off (control panel) .........
14 6
ABS (Anti-lock Braking Sy stem) ............ .191
Ac celeration
see Kickdown
Ac cess data
Setting (Blue tooth®
) ............................ 406
Ac cident and breakdown manage‐
ment
Mercedes me connect ........................ .399
Ac oustic locking verification signal
Ac tivating/deactivating ......................... 74
Ac tivating/deactivating automatic
vo lume adjustment
Ad vanced sound sy stem ......................4 28
Burmes ter®
sur round sound sy stem ... 426
Ac tive Blind Spot Assi st.......................... 24 2
Ac tivating/deactivating ...................... .245
Brake application ................................. 24 4
Fu nction .............................................. 24 2
Sy stem limitations ...............................2 42
Tr ailer operation .................................. 24 4
Ac tive bonn et(pedestrian pr otection) .. 430
Operation ............................................ 430 Re
setting ............................................. 430
Ac tive Brake Assi st
Fu nction/no tes ................................... 19 5
Setting ................................................. 201
Ac tive Di stance Assist DISTRO NIC........ 205
Ac tive Emergency Stop Assist .............. 215
Ac tive Lane Change Assi st................... 213
Calling up a speed .............................. .207
Displ ays in the instrument display .......2 15
Fu nction .............................................. 205
Increasing/decreasing speed .............. 207
Re quirements: .................................... .207
Ro ute-based speed adap tation ........... .210
Selecting ............................................. 207
St eering wheel buttons ........................ 207
St oring a speed ................................... 207
Switching off/deactivating .................. 207
Switching on/activating ......................2 07
Sy stem limitations ...............................2 05
Ac tive Eme rgency Stop Assist ................ 215
Ac tive headlamps .................................... 13 0
Ac tive Lane Change Assi st...................... 213
Ac tivating/deactivating ...................... .215
Fu nction ............................................... 213574
Index

Ac
tive Lane Keeping Assist .................... 24 5
Ac tivating/deactivating ...................... .247
Ac tivating/deactivating thewa rning .... 247
Fu nction .............................................. 24 5
Setting the sensitivity .......................... 247
Sy stem limitations ...............................2 45
Tr ailer operation .................................. 24 5
Ac tive Parking Assist .............................. 230
Cross Traf fic Alert ............................... 236
Drive AwayAssi st................................ 235
Exiting a pa rking space ...................... .234
Fu nction .............................................. 230
Manoeuvring assi stance ...................... 237
Pa rking ................................................ 232
Sy stem limitations ...............................2 30
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st....................... 209
Display ................................................ 209
Fu nction .............................................. 209
Ac tive Steering Assist ............................ .211
Ac tivating/deactivating ...................... .213
Ac tive Emergency Stop Assist .............. 215
Ac tive Lane Change Assi st................... 213Displ
ays in the instrument display .......2 15
Fu nction ............................................... 211
Sy stem limitations ...............................2 11
Ad aptive brake lights .............................. 201
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist
Fu nction .............................................. 13 2
Switching on/off ................................. 13 3
Ad aptive Highbeam Assist Plus
Fu nction .............................................. 13 3
Switching on/off ................................. 13 4
Ad Blue ®
.................................................... 500
Ad ditives .............................................5 00
Capacity .............................................. 501
Fill le vel .............................................. .260
No tes ................................................... 17 7
Purity ................................................... 500
Ra nge .................................................. 260
To pping up ...........................................1 78
Ad ditional door lo ck.................................. 77Ad
diti ves.................................................. 501
Ad Blue ®
............................................... 500
Engine oil ............................................. 501
Fu el ..................................................... 498
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
Ad dress book
see Contacts
Ad justing the balance/ fader
Adva nced sound sy stem ......................4 28
Burmes ter®
sur round sound sy stem ... 427
Ad justing the headlamp range ............... 12 8
Ad justing the sound focus
Burmes ter®
sur round sound sy stem ... 427
Ad justing treble, mid- range and bass
settings
Adva nced sound sy stem ......................4 28
Burmes ter®
sur round sound sy stem ... 426 Index
575

Ad
vanced sound sy stem
Ac tivating/deactivating au tomatic
vo lume adjustment .............................. 428
Ad justing the balance/fader ............... 428
Ad justing treble, mid-range and bass
settings ............................................... 428
Calling up the sound menu .................. 427
Information .......................................... 427
Af ter-sales service centre
see ASS YST PLUS
Air conditioning menu Calling up ............................................. 147
Air conditioning sy stem
see Climate control
Air distribution Setting ................................................ .145
Setting (multimedia sy stem) ................1 47
Air inlet see Air-water duct
Air pressu re
see Tyre pressure
Air vents ................................................... 15 3
Ad justing (front) .................................. 15 3Ad
justing (rear) .................................... 154
Air vents
see Air vents
Ai r-re circulation mode ............................ 14 8
Air-water duct .......................................... 436
Ke eping free ........................................4 36
Airbag ........................................................ .39
Ac tivation .............................................. 33
Fr ont airbag (driver, front passenger) ....39
Ins tallation locations ............................ .39
Knee airbag ........................................... 39
Overview ............................................... 39
PA SSENGER AIR BAG indicator lamp .... .43
Pr otection ..............................................40
Re duced pr otection ...............................41
Side impact airbag ................................ 39
Wi ndow airbag ....................................... 39
Ai rflow
Setting ................................................ .145
Alarm see Panic alarm
Alarm sy stem
see ATA (anti-theft alarm sy stem) Alternative
route
see Route
Ambient lighting Setting (multimedia sy stem) ................1 35
Android Auto ............................................ 395
Connecting a mobile phone ................. 396
Ending ................................................. 396
Information .......................................... 395
Overview ............................................. 395
Sound settings .................................... 396
Tr ans ferred vehicle data ......................3 96
Animals Pets in theve hicle ..................................71
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft ala rmsystem
see ATA (anti-theft alarm sy stem)
Anti-theft pr otection
Ad ditional door lock .............................. 77
Immobiliser ............................................ 94576
Index

Anti-theft pr
otection
see ATA (anti-theft alarm sy stem)
Anticipatory occupant pr otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay Trans ferred vehicle data ......................3 96
Apple CarPlay™ ....................................... 393
Connecting an iPhone ®
....................... 394
Ending ................................................. 395
No tes ................................................... 394
Overview ............................................. 393
Sound settings .................................... 395
Ashtr ay
Using ....................................................1 19
Assistance sy stems
see Driving saf ety sy stem
Assistant display Menu (on-board computer) .................. 261
ASS YST PLUS ........................................... 429
Battery disconnection pe riods .............4 30Displ
aying the service due date ........... 429
Fu nction/no tes ................................... 429
Re gular maintenance work .................. 429
Special service requ irements .............. 429
ATA (anti-theft ala rmsystem) .................. .94
Deactivating the alarm .......................... 95
Fu nction ................................................ 94
Fu nction of interior pr otection ............... 96
Priming/deactivating interior pr otec‐
tion ........................................................ 96
Priming/deactivating tow- aw ay pro‐
te ction ................................................... 95
To w- aw ay protection function ................95
AT TENTION ASSI ST.......................... 237, 238
Fu nction .............................................. 237
Setting ................................................. 238
Sy stem limitations ...............................2 37
At tention assistant
see ATTENTION ASSIST
Au gmented reality
see Route guidance with augmented reality
Au thorised workshop
see Qualified specialist workshop Au
tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights .........................12 8
Au tomatic engine start (ECO start/
sto p function) .......................................... 16 2
Au tomatic engine stop (ECO start/
sto p function) .......................................... 16 2
Au tomatic front passen ger front air‐
bag deacti vation sy stem
see Automatic front passenger front
airbag shutoff
Au tomatic front passen ger front air‐
bag shu toff .......................................... 42, 43
Fu nction of the automatic front
passenger front airbag deactivation
sy stem ................................................... 42
PA SSENGER AIR BAG indicator lamp .... .43
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .143
Au tomatic transmission
DIRECT SELECT le ver ........................... 16 9
Drive prog ram display ......................... .165
Drive programs ................................... .164 Index
577