2018 MERCEDES-BENZ A-CLASS HATCHBACK battery

Display messages
Possible causes/consequences and M
MSolutions
 Change key batteries *T
hekey bat tery is dischar ged. #
Replace the battery (→ page67).
Â
Place the key in the
marked space See Owner's
Manual *T
hekey de tection function is malfunctioning. #
Change the location of theke y in theve hicle. #
Start theve hicle with theke y in the slot (→ page154).
,
Replace key See Owner's
Manual *
Ve hicles with a digital vehicle key:only a few or no authorisations remain forst arting the engine. #
Make sure that the internet connection is not limited bycer tain mobile phone settings. #
Open the Mercedes me connect http://www.mercedes.me and call up the digital vehicle key service. #
Deactivate the service firs t and then activate it again. #
Ifth e display message still appears, con tact the Mercedes-Benz Cus tomer Assis tance Center (C AC).
Ve hicles with a digital vehicle keyst icke r:on lyafe w or no authorisations remain forst arting the engine. #
Order a new digital vehicle keyst icke r from a Mercedes-Benz Service Centre or at http://www.mercedes-
benz.com/connect. 534
Display messa ges and warning/indicator lamps

Ve
hicle Display messages
Possible causes/consequences and M
MSolutions
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shifts toposition iautomaticall y. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. #
Switch the transmission toposition j. #
Consult a qualified specialist workshop.
ï Trailer coupling extending… *E
xtending or retracting the ball nec k.
Do not attem pttospeed up, slow down or initiate there tracting or extending process using your hand, foot or other
aids. During there tracting or extending process, do not couple a traile r.
When the ball neck has reached an operational position, the display message disappears.
Teaching in transmission
Operate selector lever
Brake for XX seconds Risk
of vehicle rolling *T
he transmission is being taught in. There is a risk of theve hicle rolling away. #
Dep ress and hold the brake pedal until thete ach-in procedure has been comple ted.
The elect ric pa rking brake is applied automatically during thete ach-in procedure. #
Swit chthe ignition on. #
Select transmission position j,kori.
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, manually set the transmission toposition jbefore you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake. Display messages and
warning/indicator lamps 535

Display messages
Possible causes/consequences and M
MSolutions
d Vehicle is operational
Switch off the ignition
before exiting *Y
ou are leaving theve hicle when it is in a ready-to-drive state. #
When leaving theve hicle, switch off the ignition, secure theve hicle against rolling away and take theke y with
yo u. #
Ifyo u do not lea vetheve hicle, switch off the electrical consumers, e.g. the seat heater. Otherwise, the12 ‑V
battery may discharge and it will then be possible tostart theve hicle only using a donor battery (s tarting assis‐
ta nce).
Trans. oil overheated Drive
on with care *T
he transmission is overheating. When the display message is active, starting up and driving characteristics may be
te mp orarily impaired. #
Drive at low speeds. #
Avoid sporty driving. #
Before starting up on uphill gradients, let the transmission cool down until the display message disappears.
Teaching in transmission
complete *T
he transmission's teach-in process is comple te. All transmission positions can be engaged again.
Apply brake to select R *
You ha vetried toswitch totransmission position k. #
Dep ress the brake pedal. #
Shift the transmission toposition k.
Transmission Malfunction
Visit workshop *T
he transmission is malfunctioning.
Consult a qualified specialist workshop.
* Yo u ha veattem ptedto shift the transmission out of position jori into ano ther transmission position. Display messages and
warning/indicator lamps 537

Display messages
Possible causes/consequences and M
MSolutions &
DANG ER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the
ve hicle interior if theta ilgate is open when the engine is running, especial lyifth eve hicle is in motion. #
Alw ays switch off the engine before opening theta ilgate. #
Never drive with theta ilgate open. #
Close theta ilgate.
& inoperative Refuel vehicle *T
here is too little fuel in the fuel tank. The stationary heater cannot be swit ched on. #
Refuel theve hicle.
&
inoperative See Owner's
Man. *T
hestationary heater is temp orarily malfunctioning. #
When theve hicle is on a le vel sur face and the engine has cooled down, make up tofour attem ptsto switch on
th est ationary heater, waiting se veral minutes between each attem pt. #
Ifth est ationary heater does not swit chon, consult a qualified specialist workshop.
&
inoperative Battery low *T
he on-board electrical sy stem voltage is too lo w.
The stationary heater has swit ched itself off. #
Drive for an extended pe riod until the battery has reached a suf ficient charge leve l again. 544
Displaymessa ges and warning/indicator lamps

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 ........................................... 221
Ca re .................................................... 432
Fu nction .............................................. 221
Opening the camera co ver (r eve rsing
camera) .............................................. .225
Selecting a view ................................... 224
Setting favo urites ................................ 225
Swit ching automatic operation
on/off (r eversing camera) .................. .224 A
A/C function Activating/deactivating (multimedia
sy stem) ................................................ 14 3Switching on/off (control panel) .........
14 2
ABS (Anti-lock Braking Sy stem) ............ .185
Ac celeration
see Kickdown
Ac cess data
Setting (Blue tooth®
) ............................ 397
Ac oustic locking verification signal
Ac tivating/deactivating ......................... 66
Ac tivating/deactivating automatic
vo lume adjustment
Ad vanced sound sy stem ......................4 18
Burmes ter®
sur round sound sy stem ....4 16
Ac tive Blind Spot Assi st.......................... 237
Ac tivating/deactivating ...................... .240
Brake application ................................. 238
Fu nction .............................................. 237
Sy stem limitations ...............................2 37
Tr ailer operation .................................. 238
Ac tive bonn et(pedestrian pr otection) .. 420
Operation ............................................ 420
Re setting ............................................. 420
Ac tive Brake Assi st
Fu nction/no tes ................................... 19 0Setting .................................................
19 6
Ac tive Di stance Assist DISTRO NIC........ 200
Ac tive Emergency Stop Assist .............. 210
Ac tive Lane Change Assi st.................. 208
Calling up a speed ............................... 202
Displa ysinthe Instrument Display .......2 10
Fu nction .............................................. 200
Increasing/decreasing speed .............. 202
Re quirements: .................................... .202
Ro ute-based speed adap tation ........... .205
Selecting ............................................. 202
St eering wheel buttons ....................... 202
St oring a speed ................................... 202
Switching off/deactivating .................. 202
Switching on/activating ......................2 02
Sy stem limitations ...............................2 00
Ac tive Eme rgency Stop Assist ................ 210
Ac tive headlamps .................................... 12 5
Ac tive Lane Change Assi st..................... 208
Ac tivating/deactivating ...................... .210
Fu nction .............................................. 208
Ac tive Lane Keeping Assist .................... 24 0
Ac tivating/deactivating ...................... .241
Ac tivating/deactivating thewa rning .... 24 2 Index
561

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

Engaging neutral ..................................
16 5
Engaging pa rkposition ........................ 16 5
Engaging reve rsege ar ........................ .165
Kickdown ............................................. 167
Manual gear changing ........................ .166
St eering wheel gearshift paddles ........ .166
Tr ansmission position display .............. 16 4
Tr ansmission positions ........................ 16 4
Au tomatic transmission (problem)
see Transmission (problem)
Axle load Perm issible .......................................... 483
Tr ailer operation .................................. 497 B
Bag hook .................................................. 109
Baidu CarLife Trans ferred vehicle data ......................3 87
Ball ne ck
Fo lding out/in .................................... .242
BA S (Brake Assist Sy stem) .................... .186
Battery Cha rging (Remo teOnline) .................... 15 5Ke
y ........................................................ 67
Re mo tecontrol (s tationary heater) ...... 14 8
Battery see Battery (vehicle)
Battery (vehicle) ...................................... 449
Charging .............................................. 448
No tes .................................................. 444
No tes (s tarting assis tance and
ch arging) ............................................ .446
Re placing ............................................ 449
St arting assis tance .............................. 448
Belt see Seat belt
Bic ycle rack
Tr ailer operation .................................. 24 5
Blind Spot Assi st..................................... 237
Ac tivating/deactivating ...................... .240
Fu nction .............................................. 237
Sy stem limitations ...............................2 37
Blo wer
see Climate control
BlueTEC see AdBlue ® Blue
tooth ®
................................................ 313
Information .......................................... 313
Setting up an Internet connection ....... 397
Switching on/off ................................. 313
Boot lid see Tailgate
Brake Assist Sy stem
see BAS (Brake Assi stSystem)
Brake fluid Notes .................................................. 492
Brake forc e distribution
EBD (Elect ronic Brake forc e Distribu‐
tion) ..................................................... 19 0
Brakes ABS (Anti-lock Braking Sy stem) ........... 185
Ac tive Brake Assi st.............................. 19 0
Ad aptive brake lights .......................... .196
BA S (Brake Assi stSystem) .................. 186
Driving tips .......................................... 15 6
EBD (Electronic Brake forc e Distribu‐
tion) ..................................................... 19 0
HOLD function .................................... .212
Limited braking ef fect (salt-trea ted
ro ads) .................................................. 15 6 Index
565

Digital speedome
ter ............................... 255
Digital Vehicle Keyst icker
Locking theve hicle ................................ 70
St arting theve hicle ............................. 15 3
Un locking theve hicle ............................70
Dinghy towing
see Tow- bar sy stem
Dipped beam Changing bulbs .................................... 13 3
DIRECT SELECT le ver............................... 16 4
Engaging drive position ....................... 16 6
Engaging neutral .................................. 16 5
Engaging pa rkposition ........................ 16 5
Engaging pa rkposition automatically .. 16 5
Engaging reve rsege ar ........................ .165
Fu nction .............................................. 16 4
Display Care .................................................... 434
Display (MBUX multimedia sy stem)
Home screen ...................................... .282
Operating ............................................ 285
Display (multimedia sy stem)
Settings ................................................ 311Display (on-boa
rdcompu ter)
Displ ays on the multifunction display .. 253
Display content Displaying ............................................ 252
Display message .....................................4 98
Calling up (on-boa rdcompu ter) .......... .498
No tes .................................................. 498
Display messages ¯ - - - km/h .................................... 51 8
ç - - - km/h .................................... 517
È - - - km/h .................................... 519
# 12V battery See Owner's Man‐
ual ....................................................... 524
Ac tive Blind Spot Assi stcur rently
una vailable See Owner's Manual .........513
Ac tive Blind Spot Assi stinope rative ..... 516
Ac tive Blind Spot Assi stnot available
when towing a trailer See Owner's
Manual ................................................ .512
Ac tive bonnet malfunction See Own‐
er's Manual ......................................... 543Ac
tive Brake Assi stFunctions cur‐
re ntly limited See Owner's Manual .......511
Ac tive Brake Assi stFunctions limited
See Owner's Manual ............................511
Ac tive Dis tance Assi stavailable
again .................................................... 51 8
Ac tive Dis tance Assi stcur rently
una vailable See Owner's Manual .........518
Ac tive Dis tance Assi stinope rative ....... 51 8
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual .........514
Ac tive Lane Keeping Assist inopera‐
tive .......................................................5 15
b Active Light Sy stem inoperative ..546
Ac tive Parking Assist and
PA RKTRONIC inoperati veSee Own‐
er's Manual .......................................... 513
Ac tive Steering Assist cur rently
una vailable See Owner's Manual .........514
Ac tive Steering Assist inoperative ........513 57 0
Index