2015 MERCEDES-BENZ B-CLASS HATCHBACK ignition

Frequencies
Mobile phon e ................................. 280
Two- way radio ................................ 280
Front-passenger front airbag deac-
tivation
Display message ............................ 199
Front-passenger front airbag deac-
tivation system
Operation ........................................ .42
Problems ......................................... 46
System self-test ...............................45
Front-passenger seat
Folding the backrest forward/
back .............................................. .227
Fuses
Allocation chart ............................ .264
Before changing ............................ .263
Fuse box in the engine compart-
ment .............................................. 264
Fuse box in the front-passenger
footwell .......................................... 264
Important safety notes .................. 263 G
Generated electrical energy (Audio 20) ...................................................... 137
Generated electricity (COMAND) ..... 137
Genuine Mercedes-Benz parts ........... 19
Glove compartment .......................... 225H
Hazard warning lamps Display message ............................ 212
Switching on/off ........................... 100
Head restraints
Adjusting ......................................... 89
Adjusting (manually) ........................ 89
Adjusting (rear) ................................ 89
Fitting/removing (rear) .................... 90
Headlamp
Cleaning system (function) ............ 100
Cleaning system (notes) ................ 284
Headlamp flasher .............................. 100
Headlamps
Misting up ...................................... 102
Topping up the cleaning system .... 241 see Automatic headlamp mode
Heating
see Climate control
High voltage
see Safety notes
High voltage battery
Displaying energy consumption
(on-board computer) ...................... 178
Displaying the range (on-board
computer) ...................................... 178
High-pressure cleaners .................... 243
High-voltage battery
Battery care ................................... 136
Charging (charging station) ............ 142
Charging (mains socket) ................ 139
Charging (wallbox) ......................... 142
Charging cable heating up ............. 135
Discharged battery ........................ 136
Display message ............................ 204
Energy consumption ...................... 137
General notes ................................ 135
Method of operation ...................... 136
Outside temperatures .................... 136
Problems during charging .............. 144
Protective device ........................... 135
Range ............................................ 137
Reserve, warning lamp ................... 222
Terms of use .................................. 136
High-voltage disconnect device ......... 22
Hill start assist .................................. 128
HOLD function
Activating ....................................... 155
Deactivating ................................... 155
Display message ............................ 205
Function/note s............................. 154
Horn ...................................................... 25 I
Ignition lock see Key positions
Immobiliser .......................................... 67
Indicator and warning lamp
Restraint system ............................ 222
Indicator and warning lamps
COLLISION PREVENTION ASSIST
PLUS .............................................. 222 Index
9

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

In situations like this, the body, the under-
body, chassis parts, wheels or tyres could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the case of an accident, no longer withstand the strain they are designed
for.
In such situations, have the vehicle checked
and repaired immediately at a qualified spe-
cialist workshop. If, upon continuing your
journey, you notice that driving safety is
impaired, pull over and stop the vehicle imme- diately, paying attention to road and traffic
conditions. In such cases, consult a qualified
specialist workshop.
If you make changes to electronic components,
their software or wiring, the general operating
permit for your vehicle may be rendered invalid.
Danger of electric shock G
DANGER
The vehicle's high voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Do not touch any high-voltage components
after an accident and never modify the vehi-
cle's high-voltage electrical system. Have the vehicle towed away after an accident and the vehicle's high-voltage electrical system
checked by a qualified specialist workshop. All of the vehicle's high-voltage electrical sys-
tem components are marked with yellow warn- ing stickers which warn you about high voltages.
The cables of the vehicle's high-voltage electri-
cal system are orange.
When towing a vehicle after an accident, be sure to observe the following sections:
R Transporting the vehicle (Y page 263)
R Towing the vehicle with the front axle raised
(Y page 262)
R Towing the vehicle with both axles on the
ground (Y page 262)
Read the important safety instructions on tow-
ing away (Y page 260).
The ignition must be switched off when carrying out general tasks, such as changing bulbs or
checking the coolant level.
Automatic switching off of the vehicle's high-voltage electrical system If the restraint systems are activated during an
accident, the vehicle's high-voltage electrical
system is automatically deactivated.
This is to ensure that you do not come into con-
tact with high voltage.
Automatic protection from switching
on of the vehicle's high-voltage electri-
cal system The vehicle's high-voltage electrical system is
not activated when the vehicle is started if:
R a serious electrical insulation fault is detected
in the vehicle's high-voltage electrical system
R an electrical connection in the vehicle's high-
voltage electrical system is disconnected
Automatic switching off of the charging
process The charging process is deactivated automati-
cally if:
R the high-voltage battery is fully charged.
The charging process is interrupted automati-
cally if:
R a serious electrical insulation fault is detected
in the vehicle's high-voltage electrical system
R an electrical connection in the vehicle's high-
voltage electrical system is disconnected Introduction
21 Z

Cockpit
Function Page
:
Steering wheel gearshift pad-
dles 132
;
Combination switch 99
=
Instrument cluster 27
?
Horn
A
DIRECT SELECT lever 129
B
PARKTRONIC warning dis-
play
155
C
Overhead control panel 33 Function Page
D
Climate control systems 114
E
Ignition lock 126
F
Adjusts the steering wheel 92
G
Cruise control lever 151
H
Electric parking brake 146
I
Light switch 97
J
Diagnostics connection 22
K
Opens the bonnet 239Cockpit
25At a glance

Function Page
:
Overhead control panel 33
;
PARKTRONIC warning dis-
play
155
=
Combination switch 99
?
Instrument cluster 27
A
Horn
B
DIRECT SELECT lever 129
C
Steering wheel gearshift pad-
dles 132 Function Page
D
Light switch 97
E
Diagnostics connection 22
F
Opens the bonnet 239
G
Electric parking brake 146
H
Ignition lock 126
I
Adjusts the steering wheel 92
J
Cruise control lever 151
K
Climate control systems 11426
CockpitAt a glance

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

G
DANGER
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or might not be trig-
gered at all in the event of an accident with a high rate of vehicle deceleration. This can
effect belt tensioners or airbags, for example. In addition, the vehicle's high-voltage electri-
cal system may not be deactivated as inten-
ded in the event of an accident. Touching
damaged components of the vehicle's high-
voltage electrical system could result in an
electric shock. There is an increased risk of
injury, possibly even fatal.
Have the restraint system checked and
repaired immediately at a qualified specialist
workshop. After an accident, immediately
switch the ignition off and remove the key
from the ignition lock. PASSENGER AIR BAG indicator lamp
PASSENGER AIR BAG OFF indicator lamp
:and
PASSENGER AIR BAG ON indicator lamp ;are
part of the automatic deactivation system of the front-passenger front airbag.
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. Depending on the person in the front-passenger
seat, the front-passenger front airbag must
either be disabled or enabled; see the following
points. You must make sure of this both before
and during a journey.
R Children in a rearward-facing child
restraint system: the PASSENGER AIR BAG
OFF indicator lamp must be lit. The front-
passenger front airbag is disabled. It is imper- ative to observe the notes on the "Automatic
front-passenger front airbag deactivation sys- tem" (Y page 42) and on "Children in the
vehicle" (Y page 49).
R Children in a forward-facing child
restraint system: depending on the installed
child restraint system and the age and size of
the child, the front-passenger front airbag is
either disabled or enabled. Therefore, it is
imperative to observe the notes on the "Auto- matic front-passenger front airbag deactiva-
tion system" (Y page 42) and on "Children in
the vehicle" (Y page 49).
R All other persons: the PASSENGER AIR BAG
ON indicator lamp must be lit. The front-
passenger front airbag is enabled. Depending on the build of the person on the front-
passenger seat, the PASSENGER AIR BAG
OFF indicator lamp may light up. The front-
passenger front airbag is disabled. It will then
not be deployed in the event of an accident. In this case, the front-passenger seat should notbe used.
It is imperative to observe the notes on the
"Automatic front-passenger front airbag
deactivation system" (Y page 42) as well as
on "Seat belts" (Y page 35) and "Airbags"
(Y page 39). There you can also find infor-
mation on the correct seat position. Seat belts
Introduction A correctly worn seat belt is the most effective
means of restraining the movement of vehicle
occupants in the event of a collision or if the
vehicle overturns. This reduces the risk of vehi-
cle occupants coming into contact with parts of
the vehicle interior or being ejected from it. The seat belt also helps to keep the vehicle occu-
pants in the best position in relation to the air-
bag being deployed. Occupant safety
35Safety Z

X
Adjust the seat (Y page 86).
The seat backrest must be in an almost ver-
tical position.
X Pull the seat belt smoothly from belt outlet
=.
X Engage seat belt tongue ;in belt buckle :.
The seat belt on the driver's seat and the
front-passenger seat may be tightened auto-
matically; see "Belt adjustment"
(Y page 38).
X If necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body. The shoulder section of the seat belt must
always be routed across the centre of the shoul- der. Adjust the belt outlet if necessary.
X To raise: slide the belt outlet upwards.
The belt outlet will engage in various posi-
tions.
X To lower: hold belt outlet release ?and slide
belt outlet downwards.
X Let go of belt outlet release ?in the desired
position and make sure that the belt outlet
engages.
Seat belt for the centre rear seat If the left-hand rear seat backrest is folded down
and back up again, the rear centre seat belt may lock. The seat belt can then not be pulled out.
X To release the rear centre seat belt: pull
the seat belt out approximately 20 mm at the belt outlet on the backrest and then release itagain.
The seat belt is retracted and released. Releasing the seat belts !
Make sure that the seat belt is fully rolled up.
Otherwise, the seat belt or belt tongue will be
trapped in the door or in the seat mechanism. This could damage the door, the door trim
panel and the seat belt. Damaged seat belts
can no longer fulfil their protective function
and must be replaced. Visit a qualified spe-
cialist workshop. Basic illustration
X Press release button :, hold belt tongue;
firmly and guide it back towards belt outlet
=.
Seat belt adjustment The seat-belt adjustment is an integral part of
the PRE-SAFE
®
convenience function. This func-
tion adjusts the driver's and front-passenger
seat belt to the upper body of the occupants.
The belt strap is tightened slightly when:
R the seat belt tongue is engaged in the belt
buckle and
R the ignition is switched on
The seat-belt adjustment will apply a certain
tightening force if any slack is detected between
the vehicle occupant and the seat belt. Do not
hold on to the seat belt tightly while it is adjust-
ing.
You can switch the seat-belt adjustment on and
off in the on-board computer (Y page 188).38
Occupant safetySafety