2022 MERCEDES-BENZ A-CLASS HATCHBACK Owners Manual

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
If ESP n
canno t be activated, ESP n
is malfunctioning. 
Have ESP n
c
hecked immediately at a qualiNed specialist workshop. 
Observe the notes on deactivating ESP n
( pag
e 225).Tyre pressure monitor
Warning/indicator lamp Possible causes/consequences and
P Solutions
w
T
yre pressure monitoring
system warning lamp Oashes*The yellow tyre pressure monitor warning lamp (pressure loss/malfunction)
Oashes f
or approximately one minute and
then remains lit.
The tyre pressure monitoring system is malfunctioning. &
WARNING Ther
e is a risk of an accident if the tyre pressure monitoring system is malfunctioning
The tyre pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the tyres.
T
yres with insuPcient tyre pressure may impair the driving characteristics as well as steering and braking. 
Have the tyre pressure monitoring system checked at a q
ualiNed specialist workshop. Display messages and warning/indicator lamps
495

Warning/indicator lamp Possible causes/consequences and
P Solutions
w
T yre pressure monitoring
system warning lamp lights
up * The yellow tyre pressure monitoring system warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring system has detected tyre pressure loss in at least one of the tyres. &
WARNING Risk of an accident due t
o insuPcient tyre pressure
= The tyr
es can burst.
= The tyres can wear excessively and/or unevenly.
= The driving characteristics as well as the steering and braking may be greatly impaired.
You could then lose control of the vehicle. 
Observe the recommended tyre pressures. 
Adjust the tyre pressure if necessary. 
Stop the vehicle in accordance with the tr
aPc conditions. 
Check the tyre pressure and the tyres. 496
Display messages and warning/indicator lamps

1, 2, 3 ...
360° camer a
Care...................................................... 348
Function................................................ 260
Switching automatic mode on/oM
(reversing camera)................................. 263 A
A/C function A

ctivating/deactivating (operating
unit)....................................................... 156
MBUX.................................................... 156
ABS , Anti-lock braking system...................... 225
Acceleration Kickdown............................................... 189
Accident ERA-GLONASS test mode...................... 327
Accident, emergency call ............................. 325
Acoustic locking veriNcation signal, acti-
vating/deactivating........................................ 85
Acoustic presence indicator , Sound gen-
erator.......................................................... 164 Acoustic Vehicle Indication
, Sound g
ener-
ator.............................................................. 164
Active Blind Spot Assist Brake application................................... 254
Exit warning........................................... 252
Function................................................ 252
Trailer operation..................................... 254
Active bonnet, Pedestrian protection............ 337
Active bonnet (pedestrian protection) Resetting............................................... 337
Active Brake Assist Function................................................ 244
Setting................................................... 248
Active Distance Assist DISTRONIC Activate/deactivate variable limiter........ 237
Activating/deactivating.......................... 237
Active Emergency Stop Assist................ 243
Calling up a speed................................. 237
Function................................................ 235
Increasing/decreasing the speed........... 237
Route-based speed adaptation............... 240
Storing a speed...................................... 237
Active Lane Keeping Assist Activating/deactivating.......................... 257 Function................................................ 255
Se tting the sensitivity............................. 257
Trailer operation..................................... 255
Active light function ..................................... 139
Active Parking Assist Exiting a parking space.......................... 271
Function................................................ 268
Parking.................................................. 269
Active Service System PLUS,
ASSYST PLUS.............................................. 335
Active Speed Limit Assist ............................. 239
Active Steering Assist Activating/deactivating.......................... 243
Active Emergency Stop Assist................ 243
Function................................................ 241
Adaptive brake lights .................................... 230
Adaptive cruise control , Active Distance
Assist DISTRONIC........................................ 240
Adaptive Highbeam Assist , High beam
Activating/deactivating.......................... 142
Function................................................ 141
Adaptive Highbeam Assist Plus Function................................................ 142 Index
497

Switching on/oM
.................................... 143
AdBlue n
Additives................................................ 403
Capacity................................................ 404
Notes..................................................... 194
Purity..................................................... 403
Topping up............................................. 195
Additional door lock ....................................... 88
Additives AdBlue n
......................................... 195, 403
Engine oil............................................... 404
Fuel....................................................... 401
Aser-sales service, ASSYST PLUS................. 335
Air conditioning menu Air distribution....................................... 157
Calling up.............................................. 156
Climate control...................................... 156
Stationary heater/ventilation................. 162
Air distribution MBUX multimedia system....................... 157
Setting................................................... 155
Air inlet ........................................................ 344
Air pressure ................................................. 375 Air vents
Se tting................................................... 162
Air/water duct............................................. 344
Airbag, Occupant safety Automatic front passenger airbag shut
oM............................................................ 58 Deployment............................................. 49
Front airbag............................................. 55
Overview.................................................. 55
PASSENGER AIR BAG indicator lamps...... 59
Protection................................................ 56
Reduced protection.................................. 57
Warning lamp........................................... 49
AirOow Setting................................................... 155
Alarm system , ATA
Interior protection function..................... 103
All-wheel drive, 4MATIC................................ 190
Ambient lighting ........................................... 144
Animals, Pets in the vehicle............................ 83
Anti-lock braking system , ABS...................... 225
Anti-thes alarm system , ATA......................... 101 Anti-thes
protection, ATA
Additional door lock................................. 88
Immobiliser............................................ 101
Anticipatory operating-mode strategy ,
Route-based................................................. 180
Approval numbers ........................................ 396
Apps Mercedes me calls................................. 316
Mercedes me connect........................... 320
Assembly licence plate, front .......................... 29
Assistance system , Driving safety system..... 224
ASSYST PLUS Battery disconnection periods................ 336
Service interval display.......................... 335
Service requirements............................. 335
ATA, Anti-thes protection
Deactivating the alarm........................... 102
Function................................................ 101
Interior protection.................................. 103
Tow-away protection...................... 102, 103
ATTENTION ASSIST Function................................................ 230
Setting................................................... 232 498
Index

Attention assistant, A
TTENTION ASSIST........ 230
Authorised workshop ...................................... 41
Automatic car wash ...................................... 344
Automatic car wash mode .................... 344, 346
Automatic climate control ............................ 156
Automatic distance control , Active Dis-
tance Assist DISTRONIC............................... 235
Automatic driving lights................................ 137
Automatic emergency call , Mercedes-
Benz emergency call system......................... 325
Automatic engine start/stop , ECO start/
stop function................................................ 174
Automatic front passenger airbag shutoM
Function.................................................. 58
PASSENGER AIR BAG indicator lamps...... 59
Automatic measures aser an accident ,
Occupant safety............................................. 63
Automatic mirror folding function................. 154
Automatic transmission Changing gear........................................ 185
DIRECT SELECT lever............................. 185
Drive programs...................................... 180 DYNAMIC SELECT switch....................... 180
Eng
aging drive position.......................... 187
Engaging neutral.................................... 186
Engaging reverse gear............................ 186
Faulty gear shis..................................... 188
Kickdown............................................... 189
Manual shising ...................................... 188
Selecting park position........................... 187
Steering wheel gearshis paddles............ 188
Transmission position display................. 185
Transmission positions........................... 185
Autonomous braking .................................... 244
AVAS , Acoustic vehicle alerting system......... 164
Axle load Trailer operation..................................... 413 B
Bag hook .....................................................

128
Ball neck Folding out/in........................................ 274
Trailer coupling...................................... 276
BAS , Brake Assist System............................. 225 Battery (12 V battery)
N
otes..................................................... 360
Replacing............................................... 364
Starting assistance................................ 361
Battery (high-voltage on-board electrical
system) ........................................................ 409
Battery (key) .................................................. 86
Battery (starter battery) Charging via Remote Online................... 169
Battery operation , Plug-in hybrid operation... 164
Belt, Seat belt................................................ 50
Bicycle rack Load capacity........................................ 412
Trailer operation..................................... 277
Blind Spot Assist, Active Blind Spot Assist Activating/deactivating.......................... 255
Function................................................ 252
BlueTec AdBlue n
................................................. 194
Bluetooth n
................................................... 315
Bonnet Active bonnet......................................... 337 Index
499

Opening/closing.................................... 338
R esetting (active bonnet)........................ 337
Brake Assist Active Brake Assist................................. 244
Brake Assist System............................... 225
Brake Assist System , BAS............................. 225
Brake Nttings ................................................ 170
Brake Ouid .................................................... 406
Brake force distribution , EBD........................ 227
Brake lamps Adaptive brake lights.............................. 230
Brakes ABS (Anti-lock Braking System).............. 225
Active Brake Assist................................. 244
Adaptive brake lights.............................. 230
BAS (Brake Assist System)..................... 225
Driving tips............................................ 171
EBD (Electronic Brakeforce Distribu-
tion)....................................................... 227
HOLD function....................................... 228
Limited braking eMect (salt-treated
roads).................................................... 171
New/replaced brakepads/brake disks... 170
Post-collision brake.................................. 63 Recuperation......................................... 176
R
unning-in notes.................................... 170
Braking assistance Brake Assist System............................... 225
Breakdown Flat tyre................................................. 354
Overview of aids...................................... 20
Tow-starting........................................... 370
Towing away.......................................... 366
Transporting the vehicle......................... 368
Wheel change........................................ 384 C
Calls Mer

cedes me......................................... 315
Camera 360° Camera......................................... 260
Cleaning................................................ 348
Information............................................ 223
Reversing camera.................................. 258
Selecting the view.................................. 263
Car key .......................................................... 84
Car wash ...................................................... 344 Car-to-X communication
Hazar
d warnings.................................... 309
Care 360° camera......................................... 348
Air/water duct....................................... 344
Automatic car wash............................... 344
Car parts............................................... 348
Decorative foil........................................ 347
Display................................................... 350
Exterior lighting...................................... 348
Head-up display..................................... 350
High-pressure cleaner............................ 346
Paint...................................................... 347
Plastic trim............................................ 350
Real wood/trim elements...................... 350
Roof lining............................................. 350
Trailer hitch............................................ 348
Vehicle interior....................................... 350
Vehicle socket for the high-voltage
battery................................................... 348
Washing by hand.................................... 347
Caring for plastic trim ................................... 350
Caring for real wood ..................................... 350
Caring for rims............................................. 348 500
Index

Caring for the steering wheel
........................ 350
Caring for trim elements............................... 350
Central locking system Button..................................................... 89
Key.......................................................... 85
Changing bulbs Fitting/removing cover (front wheel
arch)...................................................... 146
Overview................................................ 146
Changing illuminants Notes..................................................... 145
Charge level display ..................................... 214
Charge level/charge display ......................... 214
Charging Charge level display............................... 214
Charging cable control panel.................. 203
Charging station, mode 3....................... 201
Ending the charging process (alternat-
ing current, mode 2/3).......................... 209
Ending the charging process (direct
current, mode 4).................................... 213
Indicator lamps on vehicle socket........... 205
Mains socket, mode 2............................ 200 Notes on charging the high-voltage
batt ery................................................... 197
On-board electrical system battery
(12 V).................................................... 363
Rapid charging station, mode 4.............. 202
Setting the charging process.................. 302
Setting the maximum permissible
charging current (mains socket)............. 203
Starting the charging process (alter-
nating current, mode 2/3)..................... 206
Starting the charging process (direct
current, mode 4).................................... 211
Stowing the charging cable.................... 197
USB port................................................ 132
Wallbox, mode 3.................................... 201
Charging cable Control panel......................................... 203
Stowing................................................. 197
Checking the coolant level ........................... 342
Child safety lock Rear door................................................. 81
Side window (rear)................................... 82
Child seat Approval categories................................. 69 Basic instructions.................................... 63
F itting ISOFIX/i-Size................................ 72
Front passenger seat............................... 79
Recommendations for child restraint
systems................................................... 67
Risks/dangers......................................... 64
Seats suitable for belt-secured child
restraint systems..................................... 75
Seats suitable for i!