2018 MERCEDES-BENZ A-CLASS HATCHBACK alarm

The indicator lamp in
the door trim on the driv‐
er's side flashes when theve hicle is loc ked from
outside. The indicator lamp goes out if theve hi‐
cle is loc ked from inside or while theve hicle is in
motion.
If th eve hicle is not opened within appr oximately
40 seconds af ter unlocking, it loc ksagain. Anti-
th eft pr otection is primed again.
Do not keep theke yto ge ther with electronic
devices or me tal objects. This can af fect the
ke y's functionalit y.
% If battery check lamp 2does not light up
af te r pressing the% or& button, the
battery is dischar ged.
Re placing theke y bat tery ( →page 67). Ac
tivating/deactivating the acoustic lo cking
ve rification signal Multimedia sy
stem:
, © .
Settings .
Vehicle #
Activate or deacti vate Acoustic lock . Ac
tivating/deactivating the panic alarm Re
quirements:
% The panic alarm function is only available in
cer tain countries.
R The ignition is switched off. #
Toactivate: press button 1for appro x‐
ima tely one second.
A visual and audible alarm is triggered. #
Todeactivate: briefly press but ton1 again.
or #
Press thest art/ stop button on the cockpit
(the key is inside theve hicle). Changing
the unlocking settings Po
ssible unlocking functions of theke y:
R cent ral unlocking
R unlocking the driver's door and fuel filler flap #
Toswitch between settings: pressthe
% and& buttons simultaneously for
appr oximately six seconds until the battery
ch eck lamp flashes twice.
If th e unlocking function forth e driver's door
and fuel filler flap has been selec ted:
R pressing the% button a second time cen‐
trally unloc kstheve hicle
R Vehicles with KEYLESS-GO: ifyo uto uch
th e inner sur face of the door handle on the
driver's door, only the driver's door and fuel
fi ller flap are unlo cked. Deactivating
theke y functions If
yo u do not use theve hicle or a keyfo r an
ex tended pe riod of time, you can reduce the
energy consum ption of there spective key.Todo
so, deactivate theke y functions. 66
Opening and closing

Anti-theft pr
otection Fu
nction of the immobiliser The immobiliser pr
events your vehicle from
being star ted without the cor rect key.
The immobiliser is automatically activated when
th e ignition is switched off and deactivated when
th e ignition is switched on. ATA
(Anti-Theft Alarm sy stem) Fu
nction of theATA system
If th eATA system is primed, a visual and audible
alarm is triggered in thefo llowing situations:
R when a door is opened
R when theta ilgate is opened
R when the bonn etis opened
R when interior pr otection is triggered
(→ page 86)
R when tow- aw ay protection is triggered
(→ page 86) The
ATA sy stem is primed automatically af ter
appr oximately ten seconds in thefo llowing situa‐
tions:
R afte r locking theve hicle with thekey
R afte r locking theve hicle using KEYLESS-GO Indicator lamp
1flashes when theAT A sy stem
is primed. The
ATA sy stem is deactivated automatically in
th efo llowing situations:
R afte r unlocking theve hicle with thekey
R afte r pressing thest art/ stop button with the
ke y in thestow age compartment
(→ page 154)
R afte r unlocking theve hicle using KEYLESS-
GO
% When the Mercedes‑Benz emer gency call
sy stem is active and the alarm stay s on for
more than 30 seconds, a message is auto‐
matically sent tothe Cus tomer Assis tance
Centre (→ page 393).
Deactivating theATA #
Press the% or& button on thekey.
or #
Press thest art/ stop button with theke y in
th estow age compartment (→ page154)
Deactivating the ala rmusing KEYLESS-GO: #
Grasp the outside door handle with thekey
outside theve hicle. Opening and closing
85

Fu
nction of tow- aw ay protection An audible and visual alarm is triggered if
your
ve hicle's angle of inclination is altered while tow-
aw ay protection is primed.
To w- aw ay protection is automatically primed
af te r about 60 seconds:
R afte r locking theve hicle with thekey
R afte r locking theve hicle using KEYLESS-GO
To w- aw ay protection is only primed when thefo l‐
lowing components are closed:
R the doors
R theta ilgate
To w- aw ay protection is automatically deactiva‐
te d:
R afte r pressing the% button on thekey
R afte r pressing thest art/ stop button with the
ke y in thestow age compartment
(→ page 154)
R afte r unlocking theve hicle using KEYLESS-
GO Information on de
tecting damage on a pa rked
ve hicle (→ page183). Priming/deactivating
tow- aw ay protection Multimedia sy
stem:
, © .
Settings .
Schnellzugriff
(Quick access) #
Prime or deactivate Tow-away protection .
To w- aw ay protection is primed again in thefo l‐
lowing cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select the
Vehicle submenu in theSettings main menu
to prime or deactivate tow- aw ay protection. Fu
nction of interior pr otection When interior pr
otection is primed, a visual and
audible alarm is triggered if mo vement is de tec‐
te d in theve hicle interior. Interior pr
otection is primed automatically af ter
appr oximately ten seconds:
R After locking theve hicle with thekey
R After locking theve hicle using KEYLESS-GO
Interior pr otection is only primed when thefo l‐
lowing components are closed:
R Doo rs
R The tailgate
Interior pr otection is automatically deactivated:
R After pressing the% button on thekey
R After pressing thest art/ stop button with the
ke y in thestow age compartment
(→ page 154)
R After unlocking theve hicle using KEYLESS-
GO
The following situations can lead toafa lse
alarm:
R Moving objects such as masc ots in theve hi‐
cle interior
R When the side window is open
R When the panoramic sliding sunroof is open 86
Opening and closing

St
arting theve hicle via Remo teOnline serv‐
ices Cooling or heating
theve hicle interior before
commencing your journey
% This function is not available in all countries.
If yo ustart theve hicle via your smartphone, the
pr ev iously selec ted air conditioning adjustment
is active.
Ensure thefo llowing before starting the engine:
R the legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R it is safe tostart and runth e engine where
yo ur vehicle is par ked.
R the fuel tank is su fficiently filled.
R thest ar ter battery is suf ficiently charge d.
% You can also set thete mp erature with your
smartphone. In form ation on Mercedes me
connect and other services: http://
www.mercedes.me
This function is not available for all models. Charging
the bat tery before commencing
yo ur journey
R Ifth eve hicle battery is discharged, you
re cei vea message on your smartphone.
R You can then start theve hicle with the
smartphone tocharge the batter y.
R The vehicle is automatically switched off
af te rte n minu tes.
Ensure thefo llowing before starting the engine:
R the legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R it is safe tostart and runth e engine where
yo ur vehicle is par ked.
R the fuel tank is su fficiently filled. St
arting theve hicle &
WARNING Risk of crushing or entrap‐
ment due tounin tentional starting of the
engine
Limbs could be crushed or trapped if the
engine is star ted unintentionally during
service or maintenance work. #
Alw ays secure the engine against unin‐
te ntional starting before car rying out
maintenance or repair work. Re
quirements:
R park position jis selected.
R the anti- theft alarm sy stem is not activated.
R the panic alarm is not activated.
R the hazard warning lights are switched off.
R the bonn etis closed.
R the doors are closed and loc ked.
R the windo wsand sliding sun roof are closed. #
Start theve hicle using the smartphone: Driving and parking
15 5

Display messages
Possible causes/consequences and M
MSolutions
Anti-theft alarm system
Malfunction *T
he anti-theft alarm sy stem is malfunctioning. #
Consult a qualified specialist workshop.
¥ Top up washer fluid *T
hewasher fluid le vel in thewa sher fluid reser voir has dropped below the minimum. #
Top up thewa sher fluid (→ page 426). Lights
Display messages
Possible causes/consequences and M MSolutions
b Intelligent Light System
inoperative *T
he Intelligent Light Sy stem is faulty. The lighting sy stem continues tofunction properly without the functions of
th e Intelligent Light Sy stem. #
Consult a qualified specialist workshop.
b Left dipped beam (Example)*T
he cor responding light source is defective. #
Drive on carefully. #
Consult a qualified specialist workshop immediatel y.
or Display messages and
warning/indicator lamps 545

Ad
vanced sound sy stem
Ac tivating/deactivating au tomatic
vo lume adjustment .............................. 41 8
Ad justing the balance/fader ................4 18
Ad justing treble, mid-range and bass
settings ................................................ 41 8
Calling up the sound menu .................. 417
Information .......................................... 417
Af ter-sales service centre
see ASS YST PLUS
Air conditioning menu Calling up ............................................ 14 3
Air conditioning sy stem
see Climate control
Air distribution Setting ................................................ .141
Setting (multimedia sy stem) ................1 43
Air inl et
see Air-water duct
Air pressure see Tyre pressure
Air vents ................................................... 14 9
Ad justing (front) .................................. 14 9Ad
justing (rear) .................................... 15 0
Air vents
see Air vents
Ai r-re circulation mode ............................ 14 4
Air-water duct .......................................... 427
Ke eping free ........................................4 27
Airbag ........................................................ .37
Ac tivation .............................................. 31
Fr ont airbag (driver, front passenger) ....37
Ins tallation locations ............................ .37
Knee airbag ........................................... 37
Overview ............................................... 37
PA SSENGER AIR BAG indicator lamp .... .41
Pr otection ..............................................38
Re duced pr otection ...............................39
Side impact airbag ................................. 37
Wi ndow airbag ....................................... 37
Airflow Setting ................................................ .141
Alarm see Panic alarm
Alarm sy stem
see ATA (anti-theft alarm sy stem) Alternative
route
see Route
Ambiance light Setting (mutlimedia sy stem) ................1 30
Android Auto ............................................ 386
Connecting a mobile phone ................. 386
Ending ................................................. 387
Information .......................................... 386
Overview ............................................. 386
Sound settings .................................... 387
Tr ans ferred vehicle data ......................3 87
Animals Pets in theve hicle ................................. 63
Answering e-mails see In Car Of fice
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 .............................. 69 Index
563

Immobiliser ...........................................85
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™ ....................................... 384
Connecting an iPhone ®
....................... 385
Ending .................................................3 86
No tes .................................................. 385
Overview ............................................. 384
Sound settings .................................... 386
Tr ans ferred vehicle data ......................3 87
Asht ray
Using ....................................................1 14
Assistance sy stems
see Driving saf ety sy stem
Assistant display Menu (on-board computer) .................. 254
ASS YST PLUS ............................................ 419
Battery disconnection periods ............. 420 Displaying
the service due date ........... 419
Fu nction/no tes .................................... 419
Re gular maintenance work .................. 419
Special service requ irements .............. .419
ATA (anti-theft ala rmsystem) .................. 85
Deactivating the alarm .......................... 85
Fu nction ................................................ 85
Fu nction of interior pr otection ............... 86
Priming/deactivating interior pr otec‐
tion ........................................................ 87
Priming/deactivating tow- aw ay pro‐
te ction ................................................... 86
To w- aw ay protection function ................86
AT TENTION ASSI ST.......................... 231, 233
Fu nction .............................................. 231
Setting ................................................. 233
Sy stem limitations ...............................2 31
At tention assistant
see ATTENTION ASSIST
Au thorised workshop
see Qualified specialist workshop
Au tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights .........................12 3Au
tomatic engine start (ECO start/
sto p function) .......................................... 15 8
Au tomatic engine stop (ECO start/
sto p function) .......................................... 15 8
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 ........................................... 40, 41
Fu nction of the automatic front
passenger front airbag deactivation
sy stem ................................................... 40
PA SSENGER AIR BAG indicator lamp .... .41
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .140
Au tomatic seat adjustment
Setting ................................................... 94
Au tomatic transmission
DIRECT SELECT le ver ........................... 16 4
Drive prog ram display ......................... .161
Drive prog rams ................................... .160
DY NA MIC SELECT switch .................... 16 0
Engaging drive position ....................... 16 6564
Index

Re
strictions ......................................... 396
Setting access da ta(Blue tooth ®
) .........3 97
Setting au tomatic disconnection ......... 398
Setting up (Blu etoo th®
) .......................3 97
Setting up (Wi-Fi) ................................. 397
Vi a communication module ................ .396
Internet radio
Calling up ............................................ 403
Calling up thest ation list (category
last selec ted) .......................................4 05
Deleting stations ................................ .405
Logging out ......................................... 405
Overview ............................................. 404
Re gis tering .......................................... 405
Saving stations .................................... 405
Selecting and connecting toast ation
............................................................ .405
Selecting stre am ................................ .405
Setting options ................................... .405
Te rm s of use ........................................4 05
iPhone ®
see Apple CarPlay™
see Mercedes-Benz Link ISOFIX
child seat securing sy stem .......... 48
Fitting .................................................... 49
No tes ..................................................... 48
Seats suitable for attaching ................... 57 J
Jack Declaration of conformity ......................23
Storage location ................................... 471
Jump-start connection ............................448
Gene ral no tes ...................................... 446
No tes .................................................. 446 K
Ke y.............................................................. 65
Ac oustic locking verification signal ....... 66
Battery ................................................... 67
Emergency key ...................................... 67
Energy consumption .............................. 66
Fe atures ................................................ 65
Ke yring attachment .............................. 67
Overview ............................................... 65
Pa nic alarm ........................................... 66
Problem ................................................. 68 Un
locking setting .................................. 66
Ke y functions
Deactivating .......................................... 66
KEYLESS-GO Locking theve hicle ................................ 71
Problem .................................................72
Un locking setting .................................. 66
Un locking theve hicle ............................71
Kickd own.................................................. 167
Using ................................................... 167
Knee airbag ................................................ 37 L
Lamp see In terior lighting
Lamps (instrument display) see Warning/indicator lamps
Lane de tection (au tomatic)
see Active Lane Keeping Assist
Lane Keeping Assist
see Active Lane Keeping Assist
Language .................................................. 316
No tes ................................................... 316580
Index