brakes MERCEDES-BENZ B-CLASS HATCHBACK 2015 Owners Manual

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

Summer tyres ................................ 268
Tyre size (data
).............................. 277
Tyre tread ...................................... 267
Wheel and tyre combinations ........ 279
see Flat tyre U
Unlocking Emergency unlocking ....................... 80
From inside the vehicle (central
unlocking button) ............................. 79 V
Vanity mirror (in sun visor) .............. 234
Variable SPEEDTRONIC
see SPEEDTRONIC
Vehicle
Correct use ...................................... 23
Data acquisition ............................... 23
Display message ............................ 210
Electronics ..................................... 280
Equipment ....................................... 20
Implied warranty .............................. 23
Individual settings .......................... 184
Leaving parked up ......................... 147
Locking (in an emergency) ............... 80
Locking (key) ................................... 72
Lowering ........................................ 276
Raising ........................................... 274
Registration ..................................... 23
Securing from rolling away ............ 274
Transporting .................................. 263
Unlocking (in an emergency) ........... 80
Unlocking (key) ................................ 72
Vehicle data ................................... 284
Vehicle data
Boot load (maximum) ..................... 284
Roof load (maximum) ..................... 284
Vehicle dimensions ........................... 284
Vehicle emergency locking ................ 80
Vehicle identification number
see VIN
Vehicle identification plate .............. 281
Vehicle tool kit .................................. 249
Ventilation
Setting the vents ........................... 123 Video
Operating the DVD ......................... 180
VIN
Seat ............................................... 282
Type plate ...................................... 281 W
Warning and indicator lamps ABS ................................................ 216
Brakes ........................................... 215
Distance warning signal ................. 222
ESP ®
.............................................. 218
ESP ®
OFF ....................................... 219
LIM (cruise control )........................ 151
LIM (variable SPEEDTRONIC) ......... 153
Overview .......................................... 28
PASSENGER AIR BAG ...................... 35
RBS (Recuperative Brake Sys-
tem) ............................................... 215
Seat belt ........................................ 214
Tyre pressure monitor ................... 223
Warning triangle ................................ 248
Washer fluid
Display message ............................ 212
Wheel and tyre combinations
Tyres .............................................. 279
Wheel bolt tightening torque ........... 276
Wheel chock ...................................... 274
Wheels
Changing a whee l.......................... 273
Changing/replacing ....................... 273
Checking ........................................ 267
Cleaning ......................................... 244
Fitting a new wheel ........................ 276
General notes ................................ 277
Important safety notes .................. 266
Information on driving .................... 266
Removing a wheel .......................... 276
Storing ........................................... 274
Tightening torque ........................... 276
Wheel size/tyre size ...................... 277
Windowbag
Display message ............................ 198
Operation ......................................... 42
Windows
Cleaning ......................................... 244
see Side windows Index
17

In general, this technical information docu-
ments the state of a component, a module, a
system or the surroundings.
These include, for example:
R operating conditions of system components,
e.g. fluid levels
R the vehicle's status messages and those of its
individual components, e.g. number of wheelrevolutions/speed, deceleration in move-
ment, lateral acceleration, accelerator pedal
position
R malfunctions and defects in important system
components, e.g. lights, brakes
R vehicle reactions and operating conditions in
special driving situations, e.g. airbag deploy-
ment, intervention of stability control sys-
tems
R ambient conditions, e.g. outside temperature
This data is of an exclusively technical nature
and can be used to:
R assist in detecting and rectifying faults and
defects
R analyse vehicle functions, e.g. after an acci-
dent
R optimise vehicle functions
The data cannot be used to trace the vehicle's
movements.
When your vehicle is serviced, technical infor-
mation can be read from the event data memory
and fault data memory.
Services include, for example:
R repair services
R service processes
R warranty events
R quality assurance
The vehicle is read out by employees of the ser-
vice network (including the manufacturer) using
special diagnostic testers. You can obtain more information there, if required.
After a fault has been rectified, the information
is deleted from the fault memory or is continu-
ally overwritten.
When operating the vehicle, situations are con-
ceivable in which this technical data, in connec-
tion with other information (if necessary, after
consultation with an authorised expert), could
be traced to a person. Examples include:
R accident reports
R damage to the vehicle
R witness statements
Further additional functions that have been con- tractually agreed upon with the customer allow
certain vehicle data to be conveyed by the vehi-
cle as well. The additional functions include, for example, vehicle location in case of an emer-
gency. Copyright information
General notes
Information on licences for free and open-
source software used in your vehicle and its
electronic components is available on the fol-
lowing website:
http://www.mercedes-benz.com/opensource 24
Introduction

Warning and indicator lamps
Function Page
:
L
Dipped-beam head-
lamps 98
;
T
Side lamps 98
=
K
Main-beam headlamps 99
?
÷
ESP® 218
A
!
Electric parking brake
(red) 222
B
!
Electric parking brake
(yellow) 222
C
J
Brakes (yellow) 215
D
·
Distance warning sig-
nal 222
E
#!
Turn signals 99 Function Page
F
6
Restraint system 222
G
ü
Seat belt 214
H
R
Rear foglamp 98
I
N
Foglamps 101
J
;
Drive system 204
K
h
Tyre pressure monitor 223
L
Ý
High-voltage battery
reserve 204
M
å
ESP®
OFF 218
N
!
ABS 216
O
J
Brakes (red) 21528
Instrument clusterAt a glance

allows you to continue steering the vehicle when
braking.
The ! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 8 km/h,
regardless of road-surface conditions. ABS
works on slippery surfaces, even when you only
brake gently.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 61). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid- ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
If ABS is malfunctioning, other systems, includ-
ing driving safety systems, will also become
inoperative. Observe the information on the ABS warning lamp (Y page 216) and display mes-
sages which may be shown in the instrument
cluster (Y page 190).
Brakes X
If ABS intervenes: continue to depress the
brake pedal with force until the braking sit-
uation is over.
X To make a full brake application: depress
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions; this serves as a
reminder to take extra care while driving. BAS (Brake Assist)
General notes BAS operates in emergency braking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 61). G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking X
Keep the brake pedal depressed firmly until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated. COLLISION PREVENTION ASSIST
PLUS
General notes i
Observe the "Important safety notes" sec-
tion (Y page 61).
COLLISION PREVENTION ASSIST PLUS consists of a distance warning function with an autono-
mous braking function and Adaptive Brake
Assist.
COLLISION PREVENTION ASSIST PLUS can help you to minimise the risk of a collision with the
vehicle in front or reduce the effects of such a
collision.
If COLLISION PREVENTION ASSIST PLUS
detects that there is a risk of a collision, you will
be warned visually and acoustically. If you do not react to the visual and audible collision warning,autonomous braking can be initiated in critical
situations. If you apply the brake yourself in a 62
Driving safety systemsSafety

X
Brake immediately in order to increase the
distance from the vehicle in front.
or X Take evasive action provided it is safe to do
so.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the system to display a warning.
With the help of the radar sensor system, the
distance warning function can detect obstacles
that are in the path of your vehicle for an exten-
ded period of time.
Up to a speed of approximately 70 km/h, the
distance warning function can also react to sta-
tionary obstacles, such as stopped or parked
vehicles.
Autonomous braking function If the driver does not react to the distance warn-
ing signal in a critical situation, COLLISION PRE- VENTION ASSIST PLUS can assist with the
autonomous braking function.
The autonomous braking function:
R gives the driver more time to react to critical
driving situations
R can help the driver to avoid an accident or
R reduces the effects of an accident
The autonomous braking function is available in
the following speed ranges:
R 7 - 105 km/h for moving objects
R 7 - 50 km/h for stationary objects
Due to the nature of the system, complicated
but non-critical driving conditions may also
cause the Autonomous Braking function to
intervene.
If the autonomous braking function demands
particularly high braking force, preventative
passenger protection measures (PRE-SAFE ®
)
are activated simultaneously (Y page 48).
Adaptive Brake Assist General notes
i Observe the "Important safety notes" sec-
tion (Y page 61).
With the help of Adaptive Brake Assist, the dis-
tance warning signal can detect obstacles that
are in the path of your vehicle for an extended
period of time. If Adaptive Brake Assist detects a risk of colli-
sion with the vehicle in front, it calculates the
braking force necessary to avoid a collision. If
you apply the brakes forcefully, Adaptive Brake
Assist will automatically increase the braking
force to a level suitable for the traffic conditions.
Adaptive Brake Assist provides braking assis-
tance in hazardous situations at speeds above
7 km/h. It uses radar sensor technology to
assess the traffic situation.
Up to a speed of approximately 250 km/h,
Adaptive Brake Assist is capable of reacting to
moving objects that have already been detected
as such at least once over the period of obser-
vation.
Up to a speed of approximately 70 km/h, Adap-
tive Brake Assist reacts to stationary obstacles.
If Adaptive Brake Assist demands particularly
high braking force, preventative passenger pro-
tection measures (PRE-SAFE ®
) are activated
simultaneously (Y page 48).
X Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally again if: R you release the brake pedal
R there is no longer any danger of a collision
R no obstacle is detected in front of your vehicle
Adaptive Brake Assist is then deactivated.
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 61). G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
R intervene unnecessarily
R not intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation. 64
Driving safety systemsSafety

G
WARNING
Adaptive Brake Assist does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
As a result, the Adaptive Brake Assist may not intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause Brake Assist to intervene.
If Adaptive Brake Assist is not available due to a malfunction in the radar sensor system, the
brake system remains available with full brake
boosting effect and BAS. Adaptive brake lights
The adaptive brake lights warn following traffic
in an emergency braking situation:
R by flashing brake lamps
R the hazard warning lamps are activated
If you brake sharply from a speed of more than
50 km/h or if braking is assisted by BAS or BAS
PLUS, the brake lamps flash rapidly. In this way,
traffic travelling behind you is warned in an even more noticeable manner.
If you brake sharply from a speed of more than
70 km/h to a standstill, the hazard warning
lamps are activated automatically. If the brakes
are applied again, the brake lamps light up con- tinuously. The hazard warning lamps switch off
automatically if you travel faster than 10 km/h. You can also switch off the hazard warning
lamps using the hazard warning button
(Y page 100). ESP
®
(Electronic Stability Program)
General notes i
Observe the "Important safety notes" sec-
tion (Y page 61). ESP
®
monitors driving stability and traction, i.e.
power transmission between the tyres and the
road surface.
If ESP ®
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilise the vehicle. The
engine output is also modified to keep the vehi- cle on the desired course within physical limits.
ESP ®
assists the driver when pulling away on
wet or slippery roads. ESP ®
can also stabilise
the vehicle during braking.
ETS (Electronic Traction System) i
Observe the "Important safety notes" sec-
tion (Y page 61).
ETS traction control is part of ESP ®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active if you deactivate
ESP ®
.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 61). G
WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilise the vehicle. In addition, other driving
safety systems are switched off. This increa-
ses the risk of skidding and an accident.
Drive on carefully. Have ESP ®
checked at a
qualified specialist workshop.
When towing your vehicle with the front axle
raised, observe the notes on ESP ®
(Y page 262).
When towing your vehicle away with the rear
axle raised, observe the notes on ESP ®
(Y page 262).
If the å ESP®
OFF warning lamp lights up
continuously, ESP ®
is deactivated.
If the ÷ ESP®
warning lamp and the å
warning lamp are lit continuously, ESP ®
is not
available due to a malfunction. Driving safety systems
65Safety Z

Transmission positions
B Parking lock
This prevents the vehicle from rolling
away when stopped. Only move the
DIRECT SELECT lever to Pwhen the
vehicle is stationary.
The key can only be removed when
the DIRECT SELECT lever is in posi-
tion P. When there is no key in the
ignition lock, the DIRECT SELECT
lever is locked in position P.C Reverse gear
Only move the DIRECT SELECT lever
to
Rwhen the vehicle is stationary. A Neutral
No power is transmitted from the
drive system to the drive wheels.
Releasing the brakes will allow you to
move the vehicle freely.
If ESP ®
is faulty: only move the
DIRECT SELECT lever to Nif the vehi-
cle is in danger of skidding, e.g. on icy
roads. 7 Drive
For driving forwards
Driving tips
Holding the vehicle stationary on uphill
gradients Do not hold the vehicle stationary on uphill gra-
dients by depressing the accelerator pedal.
Instead, only ever hold the vehicle stationary on
uphill gradients by:
R depressing the brake pedal
R engaging the electric parking brake
Kickdown Use kickdown for maximum acceleration:
X Depress the accelerator pedal beyond the
pressure point.
The needle in the power display points to the
boost area (Y page 173).
X Ease off the accelerator pedal once the
desired speed is reached. i
Maximum acceleration is available for a limi-
ted time. Program selector button
The program selector button allows you to
choose between drive programs with different
driving characteristics. X
Press program selector button :.
The selected drive program appears in the
multifunction display.
The transmission switches to automatic drive
program Eeach time the drive system is started. E
Economy Comfortable, economical
driving style
S
Sport Sporty driving style
E+
Economy
Plus Comfortable, particularly
economical driving style
Drive programs
Drive program E (Economy) Drive program
Eis characterised by the follow-
ing:
R the vehicle pulling away more gently in
forward gear unless the accelerator pedal is
depressed fully.
R reduced power on the accelerator pedal
increases sensitivity. This supports an even
and economical driving style.
R the wheels are less likely to spin.
R full power output by using kickdown. Transmission
131Driving and parking Z

Drive sensibly – save energy
Observe the following tips to save energy:
R The tyres should always be inflated to the rec-
ommended tyre pressure.
R Remove unnecessary loads.
R Remove roof racks when they are not needed.
R Avoid frequent acceleration or braking.
Energy consumption also increases when driv-
ing in low or high outside temperatures, in stop-
start traffic, on short journeys and in hilly ter-
rain. ECO display
The ECO display provides feedback on how eco-
nomical your driving characteristics are. The
ECO display assists you in achieving the most
economical driving style for the selected set-
tings and prevailing conditions. Consumption
can be significantly influenced by your driving
style.
The ECO display consists of three bars:
R Acceleration Acceleration
R Constant
Constant
R Coasting
Coasting
The percentage count is the mean value of the
three bar values. The three bars and the mean
value begin at the value of 50%. A higher per-
centage count indicates a more economical
driving style.
The ECO display does not indicate the actual fuel
consumption. A fixed percentage count in the
ECO display does not indicate a fixed consump- tion.
In addition to driving style, the consumption is
affected by many other factors, such as:
R load
R tyre pressure
R cold start
R choice of route
R the use of electrical consumers These factors are not included in the ECO dis-
play.
The evaluation of your driving style takes the
following three categories into consideration:
R Acceleration
Acceleration (evaluation of all acceleration
processes):
- the bar fills up: moderate acceleration,
especially at higher speeds
- the bar empties: sporty acceleration
R Constant Constant (assessment of driving behaviour
at all times:)
- the bar fills up: constant speed and avoid-
ance of unnecessary acceleration and
deceleration
- the bar empties: fluctuations in speed
R Coasting Coasting (assessment of all deceleration
processes):
- the bar fills up: anticipatory driving, keep-
ing your distance and early release of the
accelerator. The vehicle can coast without
use of the brakes.
- the bar empties: frequent braking
To achieve a higher value in the categories
Acceleration Acceleration andConstant
Constant, drive the vehicle
in drive program E+orE.
On long journeys at a constant speed, e.g. on the motorway, only the bar for Constant
Constant will
change.
The ECO display summarises the driving char-
acteristics from the start of the journey to its
completion. Therefore, there are dynamic
changes in the bars at the start of a journey.
During a prolonged driving time, these changes are smaller. For more dynamic changes, per-
form a manual reset.
Further information on the ECO display
(Y page 176). Brakes
Important safety notes G
WARNING
If you increase the recuperation level on slip- pery road surfaces, the drive wheels may lose
their traction. This increases the risk of skid-
ding and having an accident.
Do not increase the recuperation level on slip-
pery road surfaces. 148
Driving tipsDriving and pa
rking