2015 MERCEDES-BENZ B-CLASS HATCHBACK warning lights

1, 2, 3 ...
12 V socket see Sockets A
ABS (Anti-lock Braking System) Display message ............................ 190
Function/notes ................................ 61
Important safety notes .................... 62
Warning lamp .................................2 16
Accident
Automatic measures after an acci-
dent ................................................. 48
Activating/deactivating air-recir-
culation mode ................................... .120
Activating/deactivating cooling
with air dehumidification ................. 116
Active light function ......................... 100
Active Parking Assist
Detecting parking spaces .............. 159
Display message ............................ 206
Exiting a parking space .................. 160
Function/notes ............................ .158
Important safety notes .................. 158
Parking .......................................... 159
ADAPTIVE BRAKE ................................. 67
Adaptive Brake Assist
Function/notes ................................ 64
Adaptive brake lights .......................... 65
Adaptive Highbeam Assist
Display message ............................ 203
Function/notes ............................ .101
Switching on/off ........................... 102
Additional speedometer ................... 186
Adjusting the headlamp range ........... 99
Aerial .................................................... 22
Air conditioning
General notes ................................ 114
Air pressure
see Tyre pressure
Air vents
Important safety notes .................. 123
Rear ............................................... 124
Setting the centre air vents ........... 123
Setting the side air vents .............. .123 Air-conditioning system
see Climate control
Airbag
Automatic front-passenger front
airbag deactivatio n .......................... 42
Introduction ..................................... 39
PASSENGER AIR BAG indicator
lamps ............................................... 35
Airbags
Display message ............................ 199
Front airbag (driver, front
passenger) ....................................... 40
Important safety guidelines ............. 39
Kneebag .......................................... .41
Sidebag ............................................ 41
Triggering ......................................... 46
Windowbag ...................................... 42
Alarm
ATA (Anti-Theft Alarm system) ......... 68
Switching off (ATA) .......................... 68
Switching the function on/off
(ATA) ................................................ 68
Alarm system
see ATA (Anti-Theft Alarm system)
Anti-glare film .................................... 238
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Aquaplaning ....................................... 150
Ashtray ............................................... 234
Assistance display (on-board com-
puter) .................................................. 182
Assistance menu (on-board com-
puter) .................................................. 182
ASSYST PLUS
Displaying a service message ........ 242
Driving abroad ............................... 242
Hiding a service message .............. 242
Information about Service ............. 242
Resetting the service interval dis-
play ................................................ 242
Service message ............................ 241
Special service requirements ......... 242
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 68
Function ........................................... 68 Index
3

Switching off the alarm .................... 68
ATTENTION ASSIST
Activating/deactivating ................. 183
Display message ............................ 205
Function/note s............................. 165
Audio menu (on-board computer) .... 180
Authorised workshop
see Qualified specialist workshop
AUTO lights
Display message ............................ 203
see Lights
Automatic front-passenger front
airbag deactivation
Display message ............................ 199
Automatic front-passenger front
airbag deactivation system
Operation ......................................... 42
Problems ......................................... 46
System self-test ............................... 45
Automatic headlamp mode ................ 98
Automatic transmission
Display message ............................ 210 B
Bag hook ............................................ 229
BAS (Brake Assist System) ................. 62
Battery (key)
Checking .......................................... 74
Important safety notes .................... 74
Replacing ......................................... 75
Battery (vehicle)
Charging ........................................ 256
Display message ............................ 204
Important safety notes .................. 254
Jump starting ................................. 258
Belt
see Seat belts
Belt tensioner
Activation ......................................... 46
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 183
Display message ............................ 206
Notes/function .............................. 169
Bonnet
Closing ........................................... 240
Display message ............................ 211 Important safety notes .................. 239
Opening ......................................... 239
Boot lid
see Tailgate
Boot load (maximum) ........................ 284
Brake
EBD .................................................. 66
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 195
Notes ............................................. 283
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive ........................................... 65
Display message ............................ 201
Brake system
Driving safety systems ..................... 67
Brakes
ABS .................................................. 61
Adaptive Brake Assist ...................... 64
BAS .................................................. 62
Brake fluid (notes) ......................... 283
Display message ............................ 190
Driving tips .................................... 148
Hill start assist ............................... 128
HOLD function ............................... 154
Important safety notes .................. 148
Parking brake ................................ 146
Warning lamp ................................. 215
Breakdown
Towing away .................................. 260
Where will I find...? ........................ 248
see Flat tyre
Brightness control (instrument
cluster lighting) ................................... 27
Buttons on the steering column ...... 174 C
Calling up a fault see Display messages
Car
see Vehicle
Car wash (care) ................................. 2434
Index

Display
High-voltage battery charge level
(instrument cluster) ...................... .174
Display message
Drive system .................................. 204
Driving systems ............................ .205
Display messages
ASSYST PLUS ................................ 241
Calling up (on-board computer) ..... 189
General information ....................... 189
Hiding (on-board computer) ........... 189
Key ................................................ 212
Lights ............................................. 201
Safety systems .............................. 190
Tyres .............................................. 209
Vehicle .......................................... .210
Displaying electrical consumption
(on-board computer) ......................... 178
Displaying energy consumption
(on-board computer) ......................... 178
Distance warning function
Function/notes ................................ 63
Warning lamp ................................. 222
Distance warning signal (warning
lamp) ................................................. .222
Door
Automatic locking (on-board com-
puter) ............................................. 187
Automatic locking (switch) .............. .79
Central locking/unlocking (key) ...... 72
Control panel .................................. .32
Display message ............................ 211
Emergency locking ........................... 80
Emergency unlocking ....................... 80
Important safety note s.................... 78
Opening (from the inside) ................ 78
Drive system
Jump-starting ................................. 258
Starting with the key ...................... 128
Starting with the Start/Stop but-
ton ................................................. 127
Switching off .................................. 145
Driver's door
see Door
Driving abroad
Mercedes-Benz Service ................. 242
Symmetrical dipped beam ............... 97
Driving on flooded roads .................. 150Driving safety system
COLLISION PREVENTION ASSIST
PLUS ................................................ 62
EBD (electronic brake force distri-bution) ............................................. 66
STEER CONTROL ............................. 67
Driving safety systems
ABS (Anti-lock Braking System) ....... 61
ADAPTIVE BRAK E............................. 67
Adaptive Brake Assist ...................... 64
Adaptive brake lights ....................... 65
BAS (Brake Assist System) .............. 62
Distance warning function ............... 63
ESP ®
(Electronic Stability Pro-
gram) ............................................... 65
Important safety guidelines ............. 61
Overview .......................................... 61
Driving systems
Active Parking Assist ..................... 158
ATTENTION ASSIST ........................ 165
Blind Spot Assist ............................ 169
Cruise control ................................ 150
Display message ............................ 205
HOLD function ............................... 154
Lane Keeping Assist ...................... 170
Lane package ................................ 168
PARKTRONIC ................................. 155
Reversing camera .......................... 162
SPEEDTRONIC ............................... 152
Traffic Sign Assist .......................... 166
Driving tips
Aquaplaning ................................... 150
Brakes ........................................... 148
Downhill gradient ........................... 149
Driving abroad ................................. 97
Driving in winter ............................. 150
Driving on flooded roads ................ 150
Driving on wet roads ...................... 150
Energ y........................................... 148
General .......................................... 147
Icy road surfaces ........................... 150
Limited braking efficiency on sal-
ted roads ....................................... 149
New brake pads/linings ................ 149
Running-in tip s............................... 125
Snow chains .................................. 269
Symmetrical dipped beam ............... 97
Wet road surface ........................... 149 Index
7

DVD video
Operating (on-board computer) .... .180 E
E‑CELL display ................................... 173
EBD (electronic brake force distri-
bution)
Display message ............................ 192
Function/notes ................................ 66
ECO display
Function/notes ............................ .148
On-board computer ....................... 176
Electric motor number ......................282
Electromagnetic compatibility
Declaration of conformity ................ 22
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency
Automatic measures after an acci-
dent ................................................. 48
Emergency key
Unlocking the driver's door .............. 80
Emergency key element
Function/notes ................................ 73
Inserting .......................................... 74
Locking vehicle ................................ 80
Removing ......................................... 74
Emergency release
Charge socket flap ......................... 143
Driver's door ................................... .80
Emergency unlocking
Tailgat e............................................ 81
Vehicle ............................................. 80
Energy
Driving tips .................................... 148
Energy flow display ........................... 177
Engine electronics
Notes ............................................. 280
Environmental protection
Returning an end-of-life vehicle ....... 19
ESP ®
(Electronic Stability Pro-
gram)
Activating/deactivating (on-
board computer) ............................ 182
Characteristics ................................. 66
Deactivating/activating (notes) ....... 66
Display message ............................ 190 Function/note
s................................ 65
General notes .................................. 65
Important safety guidelines ............. 65
Warning lamp ................................. 218
ETS/4ETS (Electronic Traction Sys-
tem) ...................................................... 65
Exhaustive discharging (high-volt-
age battery) ....................................... 256
Exterior lighting
Cleaning ......................................... 245
see Lights
Exterior mirrors
Adjusting ......................................... 93
Anti-dazzle mode (automatic) .......... 94
Folding in when locking (on-boardcomputer) ...................................... 188
Folding in/out (automatically )......... 94
Folding in/out (electrically) ............. 94
Out of position (troubleshooting) ..... 94
Parking position ............................... 95
Resetting ......................................... 94
Storing settings (memory func-
tion) ................................................. 96 F
Fault message see Display messages
Fire extinguisher ............................... 249
First-aid kit ......................................... 248
Fitting a wheel
Fitting a wheel ............................... 276
Lowering the vehicle ...................... 276
Preparing the vehicle ..................... 274
Raising the vehicle ......................... 274
Removing a wheel .......................... 276
Securing the vehicle against roll-
ing away ........................................ 274
Flat tyre
Changing a wheel/fitting the
spare wheel ................................... 273
MOExtended tyre s......................... 250
Preparing the vehicle ..................... 249
TIREFIT kit ...................................... 251
Floormat ............................................. 238
Foglamps (extended range) .............. 101
Folding table ...................................... 2268
Index

Indicator lamps
Display message ............................ 201
see Warning and indicator lamps
Indicators
see Turn signals
Instrument cluster
Overview .......................................... 27
Power display ................................ 173
Settings ........................................ .186
Warning and indicator lamps ........... 28
Instrument cluster lighting .............. 172
Intelligent Light System
Activating/deactivating ................. 187
Display message ............................ 202
Overview ........................................ 100
Setting the dipped-beam head-
lamps for driving on the right/left .. 187
Interior lighting
Control .......................................... .103
Emergency lighting ........................ 103
Overview ........................................ 102
Reading lamp ................................. 102
Interior motion sensor
Deactivating ..................................... 69
Function .......................................... .69
Priming ............................................ 69
Switching off .................................... 69
ISOFIX child seat securing system ....50J
Jack Storage location ............................2 49
Using ............................................. 274 K
Key Changing the battery ....................... 75
Checking the battery ....................... 74
Convenience closing feature ............ 83
Convenience opening feature .......... 83
Display message ............................ 212
Door central locking/unlocking ....... 72
Emergency key element ................... 73
Important safety notes .................... 71
KEYLESS-GO start function .............. 73
Loss ................................................. 76
Modifying the programming ............. 73 Positions (ignition lock) ................. 126
Problem (malfunction) ..................... 76
Key positions
Start/Stop button .......................... 126
Key positions (ignition lock) ............ 126
KEYLESS-GO
Convenience closing ........................ 83
Deactivation ..................................... 72
Locking ............................................ 72
Unlocking ......................................... 72
Kickdown
Driving tips ................................... .131
Kneebag ............................................... 41 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 183
Display message ............................ 206
Function/informatio n.................... 170
Lane package ..................................... 168
Lashing eyelets ................................. 229
Licence plate lamp (display mes-
sage) ................................................... 202
Licence plate lighting
Changing bulb s.............................. 108
Light sensor (display message) ....... 203
Lighting
see Lights
Lights
Activating/deactivating the Intel-
ligent Light System ........................ 187
Active light function ....................... 100
Adaptive Highbeam Assist ............. 101
Automatic headlamp mode .............. 98
Cornering light function ................. 100
Dipped-beam headlamp s................. 98
Driving abroad ................................. 97
Foglamps (extended range) ........... 101
Hazard warning lamps ................... 100
Headlamp flashe r........................... 100
Headlamp range .............................. 99
Light switch ..................................... 97
Main-beam headlamp s..................... 99
Misted up headlamp s.................... 102 10
Index

Warning display ............................. 157
PASSENGER AIR BAG
Display message ............................1 99
Indicator lamps ................................ 35
Problems (malfunctions) ................ 199
Pets in the vehicle ............................... 61
Plastic trim (cleaning instruc-
tions) ................................................. .246
Power display ................................... .173
Power windows
see Side windows
Pre-Crash Safety System
see PRE-SAFE ®
(anticipatory
occupant protection)
PRE-SAFE ®
(anticipatory occupant
protection)
Operation ......................................... 48
PRE-SAFE ®
(preventive occupant
safety system)
Display message ............................ 196
Program selector button .................. 131
Protection against theft
ATA (Anti-Theft Alarm system) ......... 68
Immobiliser ...................................... 67
Interior motion sensor ..................... 69
Tow-away protection ........................ 68
Protection of the environment
General notes .................................. 19
Pulling away
Hill start assist ............................... 128 Q
QR code Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 23
Qualified specialist workshop ........... 23R
Radio Selecting a station ......................... 180
see separate operating instructions
Radio-based vehicle components
Declaration of conformity ................ 22
Range
RANGE PLUS ................................. 137 RANGE PLUS
charge .......................................... .184
Range ............................................ 137
Reading lamp ..................................... 102
READY indicator ................................ 172
Rear bench seat
Folding the backrest forwards/
back ............................................... 228
Rear compartment
Setting the air vents ..................... .124
Rear foglamp
Changing bulbs .............................. 107
Display message ............................ 202
Switching on/off .............................. 98
Rear lamps
see Lights
Rear window heating
Problem (fault) ............................... 120
Switching on/off ........................... 119
Rear window wiper
Replacing the wiper blade .............. 111
Switching on/off ........................... 109
Rear-compartment seat belt sta-
tus indicator ........................................ 39
Rear-view mirror
Anti-dazzle mode (automatic) .......... 94
Dipping (manual ).............................. 93
Recuperative Brake System
Driving safety systems ..................... 67
Replacing bulbs
Important safety notes .................. 103
Overview of bulb types .................. 104
Removing/replacing the cover
(front wheel arch) .......................... 105
Rescue card ......................................... 23
Reserve
High-voltage battery ...................... 222
Residual heat (climate control) ........ 122
Restraint system
Display message ............................ 198
Introduction ..................................... 34
Warning lamp ................................. 222
Warning lamp (function) ................... 34
Reverse gear
Engaging ........................................ 130
Reversing camera
Cleaning instructions ..................... 246 Index
13

Useful information
i This Owner's Manual describes all models,
series and optional equipment for your vehi-
cle that were available at the time of going to
press. National variations are possible. Note
that your vehicle may not be equipped with all
of the functions described. This is also the
case for systems and functions relevant to
safety.
i Read the information on qualified specialist
workshops: (Y page 23). Occupant safety
Introduction to the restraint system
The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident. The restraint system can also reduce the forces
to which vehicle occupants are subjected during an accident.
The restraint system comprises:
R Seat belt system
R Airbags
R Child restraint system
R Child seat securing systems
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if all vehicle
occupants always:
R fasten their seat belts correctly
(Y page 37)
R adjust their seat and head restraint properly
(Y page 87).
As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position (Y page 86).
You also have to make sure that an airbag can
inflate properly if deployed (Y page 39).
An airbag supplements a correctly fastened seat belt. As an additional safety device, the airbag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if the protection of the seat belt is sufficient in an accident, the airbags are not deployed. In
the event of an accident, only the airbags that
increase protection in the relevant accident sit- uation are deployed. However, seat belts and
airbags generally do not protect against objects
penetrating the vehicle from the outside.
Information on the restraint system operation
can be found under "Triggering of belt tension-
ers and airbags" (Y page 46).
For more information about children travelling
with you in the vehicle, see "Children in the vehi-
cle" (Y page 49). Important safety notes
G
WARNING
If the restraint system is modified, it may no
longer work as intended. The restraint system
may then not perform its intended protective function by failing in an accident or triggering
unexpectedly, for example. There is an
increased risk of injury, possibly even fatal.
Never modify parts of the restraint system. Do not attempt to modify the wiring as well as
electronic components or their software.
If it is necessary to modify an airbag system to
accommodate a person with disabilities, con-
tact a Mercedes-Benz Service Centre for details. Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the drive system is run-
ning. Therefore, malfunctions can be detected in good time.
The 6 restraint system warning lamp in the
instrument cluster lights up when the ignition is switched on. It goes out no later than a few sec-
onds after the vehicle is started. The compo-
nents of the restraint system are in operational
readiness.
A malfunction has occurred if the 6restraint
system warning lamp:
R does not light up after the ignition is switched
on
R does not go out after a few seconds with the
drive system running
R lights up again while the drive system is run-
ning 34
Occupant safetySafety

The indicator lamps display the status of the
front-passenger front airbag:
R PASSENGER AIR BAG ON lights up: the front-
passenger front airbag is enabled. If, in the
event of an accident, all deployment criteria
are met, the front-passenger front airbag is
deployed.
R PASSENGER AIR BAG OFF lights up: the front-
passenger front airbag is disabled. It will then
not be deployed in the event of an accident.
If the status of the front-passenger front airbag
changes while the vehicle is in motion, an airbag display message appears in the instrument clus-
ter (Y page 199). When the front-passenger
seat is occupied, always pay attention to the
PASSENGER AIR BAG ON and PASSENGER AIR
BAG OFF indicator lamps. Be aware of the status of the front-passenger front airbag both before
and during the journey.
If a person sits in the passenger seat, they must
be:
R seated with the seat belt fastened correctly
R in an almost upright position with their back
against the seat backrest
R with their feet resting on the floor, if possible
If the front passenger does not observe these
conditions, the automatic front-passenger front
airbag deactivation system may be influenced,
e.g. because the front passenger:
R transfers their weight by supporting them-
selves on a vehicle armrest
R sits in such a way that their weight is raised
from the seat cushion
The front-passenger front airbag may be disa-
bled by mistake as a result of these or similar
actions. In this case, the PASSENGER AIR BAG
OFF indicator lamp lights up permanently. The
front-passenger front airbag does not then
deploy during an accident. G
WARNING
If the PASSENGER AIRBAG OFF indicator lamp is lit, the front-passenger front airbag is disa-
bled. It will not be deployed in the event of an
accident and cannot perform its intended pro-
tective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury. When the front-passenger seat is occupied,
always make sure that:
R the classification of the person in the front-
passenger seat is correct and that the front- passenger front airbag is enabled or disa-
bled in accordance with the person in the
front-passenger seat.
R the front-passenger seat has been moved
back as far back as possible.
R the person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front airbag is correct. G
WARNING
If you secure a child on the co-driver's seat in a rearward-facing child restraint system and
the PASSENGER AIR BAG ON indicator lamp
lights up, the co-driver's airbag could be
deployed in the event of an accident. The childcould be struck by the airbag. There is an
increased risk of injury, possibly even fatal.
In this case, always ensure that the co-driver's
airbag is disabled. The PASSENGER AIRBAG
OFF indicator lamp must light up.
If the PASSENGER AIR BAG OFF indicator lamp
remains off and/or the PASSENGER AIR BAG
ON indicator lamp lights up, do not install a rear- ward-facing child restraint system on the front-
passenger seat. Further information can be
found under "Problems with the automatic front-
passenger front airbag deactivation system"
(Y page 46). G
WARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too close to the dashboard, in the event of an
accident, the child could:
R come into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
R be struck by the airbag if the PASSENGER
AIR BAG ON indicator lamp is lit Occupant safety
43Safety
Z