brakes MERCEDES-BENZ B-Class ELECTRIC 2015 W246 Owner's Manual

B
Backup lamp Changing bulb s.............................. 109
Display message ............................ 216
Bag hook ............................................ 245
BAS (Brake Assist System) ................. 63
Battery (SmartKey)
Checking .......................................... 75
Important safety notes .................... 75
Replacing ......................................... 75
Battery (vehicle)
Charging ........................................ 287
Display message ............................ 217
Important safety notes .................. 285
Jump starting ................................. 290
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 195
Display message ............................ 219
Notes/function .............................. 177
Brake fluid
Display message ............................ 208
Notes ............................................. 332
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Display message ............................ 215
Brake system
Driving safety systems ..................... 68
Brakes
ABS .................................................. 63
Adaptive Brake Assist ...................... 65
BAS .................................................. 63
Brake fluid (notes) ......................... 332
Display message ............................ 201
EBD .................................................. 68
Hill start assist ............................... 134
HOLD function ............................... 163
Important safety notes .................. 158
Maintenance .................................. 159
Parking brake ................................ 155
Riding tips ...................................... 158
Warning lamp ................................. 229
Breakdown
Towing away .................................. 292
see Flat tire Brightness control (instrument
cluster lighting)
................................... 31
Buttons on the steering wheel ......... 184 C
California Important notice for retail cus-
tomers and lessees .......................... 21
Calling up a malfunction
see Display messages
Care
Car wash ........................................ 272
Carpets .......................................... 278
Display ........................................... 276
Exterior lights ................................ 275
Gear or selector lever .................... 277
Interior ........................................... 276
Matte finish ................................... 274
Note s............................................. 272
Paint .............................................. 273
Plastic trim .................................... 276
Power washer ................................ 273
Rear view camera .......................... 276
Roof lining ...................................... 278
Seat belt ........................................ 278
Seat cove r..................................... 277
Sensors ......................................... 275
Steering wheel ............................... 277
Trim pieces .................................... 277
Washing by hand ........................... 273
Wheels ........................................... 274
Windows ........................................ 274
Wiper blades .................................. 275
Wooden trim .................................. 277
Cargo compartment cover
Important safety notes .................. 246
Installing/removing ....................... 246
Notes/how to use ......................... 246
Cargo compartment enlargement ... 244
Cargo compartment floor
Height adjustment ......................... 248
Important safety notes .................. 247
Opening/closing ............................ 248
Stowage well (under )..................... 247
Cargo net
Attaching ....................................... 247
Important safety information ......... 246 Index
5

Doors
Automatic locking (on-board com-
puter) ............................................ .198
Automatic locking (switch) .............. .80
Central locking/unlocking
(SmartKey) ...................................... .72
Control panel .................................. .36
Display message ............................ 224
Emergency locking ........................... 81
Emergency unlocking ....................... 80
Important safety note s.................... 79
Opening (from inside) ...................... 79
Drinking and driving ......................... 157
Drive system
Jump-starting ................................. 290
Starting with the SmartKey ............ 133
Starting with the Start/Stop but-
ton ................................................. 133
Switching off .................................. 154
Driver's door
see Doors
Driving abroad
Mercedes-Benz Service ................. 272
Driving on flooded roads .................. 161
Driving safety systems
ABS (Anti-lock Braking System) ....... 63
ADAPTIVE BRAK E............................. 68
Adaptive Brake Assist ...................... 65
BAS (Brake Assist System) .............. 63
COLLISION PREVENTION ASSIST
PLUS ................................................ 64
Distance warning function ............... 64
EBD (electronic brake force distri- bution) ............................................. 68
ESP ®
(Electronic Stability Pro-
gram) ............................................... 66
ETS (Electronic Traction System) ..... 66
Important safety information ........... 62
Overview .......................................... 62
STEER CONTROL ............................. 68
Driving systems
Active Parking Assist ..................... 168
ATTENTION ASSIST ........................ 176
Blind Spot Assist ............................ 177
Cruise control ................................ 162
Display message ............................ 219
HOLD function ............................... 163
PARKTRONIC ................................. 165 Rear view camera .......................... 172
Driving tips
Brakes ........................................... 158
Break-in perio d.............................. 130
Checking brake lining thickness .... 160
Downhill gradient ........................... 158
Drinking and driving ....................... 157
Driving in winter ............................. 161
Driving on flooded roads ................ 161
Driving on wet roads ...................... 161
Energ y........................................... 157
General .......................................... 157
Hydroplaning ................................. 161
Icy road surfaces ........................... 161
Limited braking efficiency on sal-
ted roads ....................................... 159
Snow chains .................................. 303
Wet road surface ........................... 159
DVD video
Operating (on-board computer) ..... 191 E
E‑CELL display ................................... 183
EBD (electronic brake force distri-
bution)
Display message ............................ 205
Function/note s................................ 68
ECO display
Function/note s............................. 157
On-board compute r....................... 187
Electric motor number ...................... 331
Electrical energy generated
(COMAND) .......................................... 142
Emergency
Automatic measures after an acci-
dent ................................................. 56
Emergency release
Driver's door .................................... 80
Vehicle ............................................. 80
Emergency Tensioning Devices
Activation ......................................... 54
Emergency unlocking
Tailgate ............................................ 82
Energy
Driving tip s.................................... 157
Energy flow display ........................... 1878
Index

Brakes ........................................... 229
Distance warning ........................... 237
ESP
®
.............................................. 233
ESP ®
OFF ....................................... 234
Overview .......................................... 32
PASSENGER AIR BAG ...................... 41
RBS (Recuperative Brake Sys-
tem) ............................................... 229
Restraint system ............................ 236
Seat belt ........................................ 228
Tire pressure monitor .................... 238
Warranty .............................................. 20
Washer fluid
Display messag e............................ 225
Wheel and tire combination
see Tires
Wheel bolt tightening torque ........... 325
Wheel chock ...................................... 322
Wheels
Changing a whee l.......................... 321
Checking ........................................ 301
Cleaning ......................................... 274
General notes ................................ 325
Important safety notes .................. 300
Information on driving .................... 300
Interchanging/changing ................ 321
Mounting a new whee l................... 324
Removing a whee l.......................... 324
Storing ........................................... 321
Tightening torque ........................... 325
Wheel size/tire size ....................... 325
Window curtain air bag
Display message ............................ 211
Operation ......................................... 48
Windows
see Side windows
Windshield
Defrosting ...................................... 121
Windshield washer system
Adding washer fluid ....................... 270
Note s............................................. 333
Windshield wipers
Display message ............................ 225
Problem (malfunction) ................... 114
Rear window wipe r........................ 111
Replacing the wiper blades ............ 112
Switching on/of f........................... 111 Winter driving
Slippery road surfaces ................... 161
Snow chains .................................. 303
Winter operation
General notes ................................ 302
Winter tires
M+S tire s....................................... 302
Wiper blades
Cleaning ......................................... 275
Important safety notes .................. 112
Replacing (rear window )................ 113
Replacing (windshield) ................... 112
Wooden trim (cleaning instruc-
tions) .................................................. 277 Z
ZONE function Switching on/of f........................... 121 18
Index

Warning and indicator lamps
Function Page
:
L
Low-beam head-
lamps 101
;
T
Parking lamps 101
=
K
High-beam head-
lamps 102
?
÷
ESP® 233
A
F
Electric parking brake
(red) 236
B
!
Electric parking brake
(yellow) 236
C
·
Distance warning 237
D
#!
Turn signals 102
E
6
Restraint system 236 Function Page
F
ü
Seat belt 228
G
é
RBS (Recuperative
Brake System) 229
H
R
Rear fog lamp 101
I
;
Drive system 217
J
h
Tire pressure monitor 238
K
Ý
High-voltage battery
reserve 218
L
å
ESP®
OFF 233
M
!
ABS 230
N
$
Brakes (red) 22932
Instrument clusterAt a glance

Braking
X
Keep the brake pedal firmly depressed 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 information COLLISION PREVENTION ASSIST PLUS con-
sists of a distance warning function with an
autonomous emergency braking function and
adaptive Brake Assist.
COLLISION PREVENTION ASSIST PLUS can
help you to minimize the risk of a front-end
collision with a vehicle ahead 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 critical situation, the COLLISION PREVENTION ASSIST PLUS adaptive Brake
Assist assists you.
Important safety notes In particular, the detection of obstacles can
be impaired if:
R there is dirt on the sensors or anything else
covering the sensors
R there is snow or heavy rain
R there is interference by other radar sources
R there are strong radar reflections, for
example in parking garages
R a narrow vehicle traveling in front, e.g. a
motorbike
R a vehicle traveling in front on a different line
R new vehicles or after a service on the COL-
LISION PREVENTION ASSIST PLUS system Observe the notes in the section on break-
ing-in (Y page 130).
Following damage to the front end of the vehi- cle, have the configuration and operation of
the radar sensor checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at low speeds where there is no visible
damage to the front of the vehicle.
Distance warning function Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 62). G
WARNING
The distance warning function does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
Thus, the distance warning function cannot
provide a warning in all critical situations.
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake. G
WARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
Function X To activate/deactivate: activate or deac-
tivate the distance warning function in the
on-board computer (Y page 194).64
Driving safety systemsSafety

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 condi-
tions may also cause Brake Assist to inter-
vene.
If adaptive Brake Assist is not available due to a malfunction in the radar sensor system, thebrake system remains available with full
brake boosting effect and BAS.
With the help of adaptive Brake Assist, the
distance 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 col-
lision with the vehicle in front, it calculates
the braking force necessary to avoid a colli-
sion. If you apply the brakes forcefully, adap-
tive Brake Assist will automatically increase
the braking force to a level suitable for the
traffic conditions.
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.
If adaptive Brake Assist demands particularly
high braking force, preventative passenger
protection measures (PRE-SAFE ®
) are activa-
ted simultaneously.
Up to a speed of approximately 155 mph
(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 observation. Up to a speed of approximately 44 mph
(70 km/h), adaptive Brake Assist reacts to
stationary obstacles. ESP
®
(Electronic Stability Program)
General notes i
Observe the "Important safety notes" sec-
tion (Y page 62).
ESP ®
monitors driving stability and traction,
i.e. power transmission between the tires 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 stabilize the
vehicle. The engine output is also modified to keep the vehicle on the desired course within
physical limits. ESP ®
assists the driver when
pulling away on wet or slippery roads. ESP ®
can also stabilize the vehicle during braking.
ETS (Electronic Traction System) i
Observe the "Important safety notes" sec-
tion (Y page 62).
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 trans-
ferred to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP ®
.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 62). G
WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilize the vehicle. Additionally, further driv- ing safety systems are deactivated. This
increases the risk of skidding and an accident. 66
Driving safety systemsSafety

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
vehicle 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
gradients by depressing the accelerator
pedal. Instead, only ever hold the vehicle sta-
tionary 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 183).
X Ease off the accelerator pedal once the
desired speed is reached.
i Maximum acceleration is available for a
limited time.
Rocking the vehicle free Shifting the transmission repeatedly between
gears Dand Rmay help to free the vehicle if it
has become stuck in slush or snow. The vehi- cle's engine management system limits the
speed to a maximum of 5 mph (9 km/h) when shifting back and forth. To shift back and forth
between transmission positions Dand R, move the DIRECT SELECT lever up and down
past the point of resistance. Program selector button
The program selector button allows you to
choose between drive programs with differ-
ent 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 star-
ted. E
Economy Comfortable, economical
driving style
S
Sport Sporty driving style
E+
Economy
Plus Comfortable, particularly
economical driving style
Drive program
Drive program Eis characterized by the fol-
lowing:
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
137Driving and parking Z

The ECO display does not indicate the actual
fuel consumption. A fixed percentage count
in the ECO display does not indicate a fixed
consumption.
Apart from driving style, consumption is
dependent on many factors such as, e.g.:
R load
R tire pressure
R cold start
R choice of route
R electrical consumers switched on
These factors are not included in the ECO dis-
play.
The evaluation of your driving style is carried
out using the following three categories:
R Acceleration
Acceleration (evaluation of all accelera-
tion processes):
- The bar fills up: moderate acceleration,
especially at higher speeds
- The bar empties: sporty acceleration
R Constant
Constant (assessment of driving behavior
at all times)
- The bar fills up: constant speed and
avoidance 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,
keeping 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 vehi-
cle in drive program E+orE.
On long journeys at a constant speed, e.g. on
the highway, only the bar for Constant
Constantwill
change.
The ECO display summarizes the driving char- acteristics from the start of the journey to its completion. For this reason, the bars change
dynamically at the beginning of the journey.
On longer journeys, there are fewer changes. For more dynamic changes, carry out a man-
ual reset.
For further information on the ECO display,
see (Y page 187). Braking
Important safety notes G
WARNING
If you increase the recuperation level on slip- pery road surfaces, the drive wheels may lose
their traction. There is an increased danger of skidding and accidents.
Do not increase the recuperation level on slip-
pery road surfaces.
The braking performance of the electric
motor using recuperative braking is, in some
operating modes, either reduced or not effec- tive:
R when the condition of charge of the high-
voltage battery increases
R if the high-voltage battery is not yet at a
normal operating temperature
R when driving close to the maximum speed
R when the vehicle is almost stationary
R in transmission position N
R during and after ESP stability control
If you do not make an additional effort to
apply the brake yourself, the braking effect
may not be sufficient. If necessary, counter-
act the reduced regenerative braking effect
by applying the brake yourself.
Downhill gradients On long, steep gradients, you must reduce the
load on the brakes by selecting maximum
recuperation. This helps you to avoid over-
heating the brakes and wearing them out
excessively.
Recuperation allows the vehicle to be decel-
erated without placing a load on the braking
system. 158
Driving tipsDriving and parking

Do not depress the brake pedal continuously
while the vehicle is in motion, e.g. causing the
brakes to rub by constantly applying light
pressure to the pedal. This results in exces-
sive and premature wear to the brake pads.
Heavy and light loads G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy load, do not stop the vehicle immediately.
Drive on for a short while. This allows the air-
flow to cool the brakes more quickly.
Wet roads If you have driven for a long time in heavy rain
without braking, there may be a delayed reac- tion from the brakes when braking for the firsttime. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up
the brake discs, thereby drying them more
quickly and protecting them against corro-
sion.
Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt
residue may form on the brake discs and brake pads. This can result in a significantly
longer braking distance.
R In order to prevent any salt build-up, apply
the brakes occasionally while paying atten- tion to the traffic conditions.
R Carefully depress the brake pedal and the
beginning and end of a journey.
R Maintain a greater distance to the vehicle
ahead.
Servicing the brakes !
If the red brake warning lamp lights up in
the instrument cluster and you hear a warn- ing tone while the engine is running, the
brake fluid level may be too low. Observe
additional warning messages in the multi-
function display.
The brake fluid level may be too low due to brake pad wear or leaking brake lines.
Have the brake system checked immedi-
ately. This work should be carried out at a
qualified specialist workshop.
! A function or performance test should
only be carried out on a 2-axle dynamom-
eter. If you are planning to have the vehicle tested on such a dynamometer, contact an
authorized Mercedes-Benz Center to
obtain further information first. Otherwise,
you could damage the drive train or the
brake system.
! As the ESP ®
system operates automati-
cally, the engine and the ignition must be
switched off (the SmartKey must be in posi-
tion 0or 1in the ignition lock) if:
R the electric parking brake is tested on a
brake dynamometer (for a maximum of
ten second s)
R the vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP ®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a quali- Driving
tips
159Driving an d parking Z

fied specialist workshop. Consult a qualified
specialist workshop to arrange this.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the function- ality of your brakes at regular intervals.
You can find a description of Brake Assist
(BAS) on (Y page 63).
Mercedes-Benz recommends that you only
have brake pads/linings installed on your
vehicle which have been approved for
Mercedes-Benz vehicles or which correspond to an equivalent quality standard. Brake
pads/linings which have not been approved
for Mercedes-Benz vehicles or which are not
of an equivalent quality could affect your vehi-
cle's operating safety.
Mercedes-Benz recommends that you only
use brake fluid that has been specially
approved for your vehicle by Mercedes-Benz,
or which corresponds to an equivalent quality standard. Brake fluid which has not been
approved for Mercedes-Benz vehicles or
which is not of an equivalent quality could
affect your vehicle's operating safety.
Checking brake lining thickness You can measure the break pad/lining thick-
ness using a test gage. Color-coding (green or
red) on the test gage allows you to determine whether the brake pad/lining thickness is still
sufficient. The test gage is in the vehicle docu-
ment wallet in the glove box. Front wheel
Rear wheel
X Bring the vehicle and wheels into a suitable
position so that you can attach test gage
A.
X Secure the vehicle against rolling away
(Y page 153).
X Engage park position P.
X Switch off the drive system.
X Place test gage Abetween the wheel's
spokes on brake pad/lining =.160
Driving tipsDriving and parking