2015 MERCEDES-BENZ B-Class ELECTRIC ECU

To avoid hazardous situations, observe the
following:
R Only connect the charging cable to mains
sockets that:
- are installed correctly and
- have been approved by an electrical spe-
cialist.
R For safety reasons, only use the charging
cables supplied with the vehicle, or charg-
ing cables which have been approved for
use with this vehicle.
R Never use a damaged charging cable.
R Do not use:
- Extension cables
- Cable drums
- Multiple sockets
R Do not use a socket adapter to connect the
charging cable to the mains socket. The
only exception is if the adapter has been
tested and approved by the manufacturer
for charging the high-voltage battery in an
electric vehicle.
R Always observe the safety notes in the
socket adapter's operating instructions.
The vehicle's high voltage electrical system is under high voltage.
R Do not handle high-voltage components or
the orange cables of the vehicle's high-volt-age electrical system.
R Do not touch high-voltage components or
the orange cables of the high-voltage elec-
trical system when a vehicle has been
involved in a crash.
R Do not touch any damaged components or
damaged orange cables of the vehicle's
high-voltage electrical system.
R Do not remove the covers of the high-volt-
age electrical system components that are
marked with a warning sticker. General notes
Method of operation The vehicle is equipped with a high-voltage
battery for driving. The high-voltage battery
stores the energy needed to operate the elec-
tric motor and releases it again.
The electric motor uses energy that has been stored in the high-voltage battery when pull-
ing away, accelerating and during the jour-
ney.
In overrun mode (except D+), kinetic energy
is converted by means of energy recuperation
into electrical energy and stored in the high-
voltage battery.
The high-voltage battery can be charged as
follows:
R through energy recuperation while the
vehicle is in motion
R with the charging cable at a mains socket
while the vehicle is stationary
R with the charging cable at a charging sta-
tion while the vehicle is stationary
The high-voltage battery can be charged in a
voltage range from 110 V to 240 V.
If the condition of charge drops to less than
13%, the high-voltage battery reserve indica-
tor lamp lights up in the instrument cluster.
Charge the high-voltage battery as soon as
possible.
Below a condition of charge of 5%, the per-
formance of the vehicle is reduced. The vehi-
cle's high-voltage electrical system switches
off at a condition of charge of 0%.
Use of the pre-entry climate control function
may mean that the high-voltage battery is not fully charged.
Discharged battery The vehicle's high-voltage electrical system
switches off if the high-voltage battery is com-
pletely discharged. 30 seconds prior to this,
you are informed of the switch-off by the
Battery level too low. Stop and Battery level too low. Stop and High-voltage battery
141Driving and parking Z

charge immediately
charge immediately
message. This pro-
tects the battery from exhaustive discharge.
It is not possible to restart the drive system
until after charging.
Do not leave the vehicle parked for longer
than 14 days with a high-voltage battery con-
dition of charge below 20%.
You can check the condition of charge in the charge level display (Y page 184).
Further information on the "Energy flow dis-
play" can be found in the "Trip" menu
(Y page 187).
High and low outside temperatures Low outside temperatures
The efficiency of the high-voltage battery is
significantly reduced at very low outside tem-
peratures. The high-voltage battery is then no longer able to provide the normal electrical
power output.
High outside temperatures
To prevent damage to the high-voltage bat-
tery due to very high outside temperatures,
the maximum power output of the high-volt-
age battery is reduced automatically.
The E-CELL display indicates the maximum
amount of power available (Y page 183).
Energy consumption and range This range is reduced by:
R high and low outside temperatures
R a non-anticipatory driving style
R switching on consumers, e.g. air-condition-
ing system or heating.
The battery's physical characteristics are
such that leaving the vehicle parked for an
extended period at low outdoor temperatures
without charging it can lead to:
R a reduction in battery performance
R longer charge times
In extreme cases, this could mean that the
vehicle cannot be started. For this reason,
connect the charging cable when leaving the vehicle parked for long periods at low outdoor
temperatures.
As a result of its basic characteristics, the
amount of energy available from the high-
voltage battery decreases over the course of its life.
This reduces:
R the maximum range that can be achieved
by the vehicle
R the maximum output (acceleration) of the
vehicle
You can actively reduce the energy consump- tion of your vehicle in a number of ways, for
example, by:
R an anticipatory driving style
R reducing the use of electrical consumers
R having the vehicle regularly maintained
The charging time of the high-voltage battery may change over the course of its life.
Displaying energy consumption and
recuperated electric energy (COMAND/ Audio 20) :
Energy consumption
; Recuperated electric energy
Every bar of the graph displays the average
value for one minute.
Energy consumption indicator :may differ
from the indicator in the From Start From Start
(Y page 187) trip computer in the Trip
Trip
menu. 142
High-voltage batteryDriving and parking

Displaying energy consumption and recu-
perated electric energy:
X Switch on Audio 20/COMAND Online (see
the separate operating instructions).
X To select Vehicle Vehiclefrom the main function
bar: turn and press the controller.
The vehicle menu is displayed.
X To select Consumption
Consumption: turn and press the
controller.
Energy consumption :and recuperated
electric energy ;for the last 15 minutes of
the journey are shown.
Exiting the vehicle settings:
X Press the %button on the controller.
or
X To select %: slide 6and press the
controller.
To reset values: the values are reset along
with the From Start
From Start trip computer
(Y page 189).
Displaying range on the map (COMAND) :
Current vehicle position
; Range
= Range when route guidance is active (dark
blue)
The range can be displayed on the navigation
map for electric vehicles. The range is shown as a circle around the current vehicle posi-
tion. When route guidance is active, the range
is also shown along the calculated route. This is done by respective coloring of the blue
route on the navigation map. The range display on the COMAND navigation
map is available on the 2D map display and a
scale of 2 to 100 km.
X To switch to navigation mode: press the
ß button.
X To show the menu: slide6the control-
ler.
X To select Options Options: turn and press the con-
troller.
X Select Map Content
Map Content.
X Select Range on Map
Range on Map .
Switch the display in the map on Oor off
ª.
Displaying the range and destination
accessibility via navigation mode:
X To switch to navigation mode: press the
ß button.
The map shows the vehicle's current posi-
tion.
or
X From one of the other main functions:
slide 5the controller (e. g. in radio
mode).
The main function bar is displayed.
X To select Navi
Navi from the main function bar:
turn and press the controller.
The map shows the vehicle's current posi-
tion.
X To call up e-Navigator: press theß
button.
X To select Range on Map Range on Map in the navigation
menu: turn and press the controller.
The range and destination accessibility are
displayed on the navigation map. High-voltage batte
ry
143Driving an d parking Z

X
To switch on: press button:.
The green Indicator lamp lights up.
X To switch off: press button:.
The indicator lamp goes out.
RANGE PLUS switches off automatically if: R the charging cable is disconnected or
R the charging process is complete
Information on charging with RANGE PLUS
(Y page 196).
Notes on battery care Avoid storing or transporting the vehicle in
high temperatures over a long period (e.g.
container transport).
If you park the vehicle and leave it stationary
for longer periods, connect it to a power sup-
ply.
Temperatures below Ò13‡(Ò25 †) and over
104 ‡ (40 †), which affect the vehicle for a
period of more than seven days, can cause
irreversible damage.
Conditions of use Observe the following notes:
R information on exceptions and limitations
in warranty documentation and in the rela-
ted Maintenance Booklet
R maintenance notes for the high-voltage
battery in the Maintenance Booklet Handling the charging cable and charg-
ing cable controls Do not leave the charging cable controls
(Y page 146) hanging loose from an electrical
outlet. Otherwise, this could result in a poor
contact with the electrical outlet and mal-
functions when charging the vehicle.
To ensure that the brackets within the charg- ing cable controls are not subjected to incor-
rect loads, observe the following:
R Never lift or carry the controls by the charg-
ing cable connector or the mains plug.
R To transport the charging cable, the coiled
part can be:
- wrapped around the controls or
- secured to the housing of the controls
Heat generated by the charging cable
and charging cable connector Pay attention to the "Important safety notes"
(Y page 140).
During the charging process, the charging
cable and charging cable connector may heat
up.
The charging cable and charging cable con-
nector will only heat up within the permissible
limiting values, provided that:
R the power supply and the charging cable
are not damaged
R the instructions for handling the charging
cable and controls on the charging cable
are observed
Should the permissible heating temperature
limits be exceeded, have the mains power
supply checked.
Protection device against overvoltage !
Voltage surges in the mains supply can
damage the vehicle. The vehicle is there-
fore equipped with a device which protects
it from voltage surges in the mains supply.
This device may be triggered during severe
thunderstorms, for example, and may lead
to the building's fuse being tripped and an High-voltage battery
145Driving and parking Z

interruption in the power supply. These
functions protect the vehicle. After the
building fuse is switched on again, the
charging process resumes automatically.
Following an interruption in the power sup- ply without tripping of the building's fuse, it
may take up to 15 minutes for charging to
resume automatically.
Switch on the building's fuse again after the
protection device against overvoltage has
been triggered. Otherwise, the charging proc-
ess cannot be continued. The high-voltage
battery will not be charged and you may not
be able to drive the vehicle.
If other devices are protected by the same
protective device, these are switched off as
well when the protective device is triggered.
Ensure that these other devices are still
operational after reactivating the protection
device. Charging the high-voltage battery via
the electrical outlet
Charging cable Important safety notes
! Only use the charging cable to charge the
high-voltage battery. Do not use the charg-
ing cable for other purposes. It may other-
wise be damaged.
The vehicle is supplied with a single-phase
12 A charging cable. Only use the charging
cable included with the vehicle, which has
been approved for vehicle use.
Pay attention to the "Important safety notes"
(Y page 140).
If you use the supplied 12 Acharging cable to
charge a high-voltage battery:
R the charge time increases considerably
R electrical consumption increases consider-
ably
Where possible, charge the high-voltage bat-
tery at a charging station (Y page 149). Onlythen can certified electrical energy consump-
tion levels be reached.
i The charging process can vary depending
on the charging station. Therefore, always
observe the local information.
Stowing the charging cable
The charging cable can be stowed in a bag in the trunk of the vehicle. To do so, the bag
must be secured to the cargo tie-down rings
using the retaining strap provided.
Controls on the charging cable :
A/C status indicator
; Control/protection system indicator
= Charge current indicator
? Charge current setting button
When displays :and ;on the charging
cable light up, this means the following: 146
High-voltage batteryDriving and parking

G
WARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the transmission out of park position
P.
R start the vehicle's drive system.
They could also operate the vehicle's equip-
ment. There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.
! While the vehicle is rolling, do not shift the
transmission directly from Dto R, from Rto
D or directly to P.
Do not open the driver's door while the
vehicle is in motion. Otherwise, at low
speeds in transmission position Dor R,
park position Pis engaged automatically
and the electrical parking brake is applied.
The transmission could be damaged.
! Always secure the vehicle correctly
against rolling away. Otherwise, the vehicle
or its drivetrain could be damaged.
To ensure that the vehicle is secured against rolling away unintentionally:
R the electric parking brake must be applied.
R the transmission must be in position P.
R the SmartKey in the ignition lock must be
turned to position 0and removed from the
ignition lock.
R on steep uphill or downhill gradients, turn
the front wheels towards the curb. Switching off the drive system
G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This can affect
the power steering and the brake boosting
effect, for example. You will require consider- ably more effort to steer and brake. There is a
risk of an accident.
Do not switch off the ignition while driving.
X Shift the DIRECT SELECT lever to position
P.
X With the SmartKey: turn the SmartKey to
position 0in the ignition lock and remove it.
The immobilizer is activated.
X With the Start/Stop button: press the
Start/Stop button (Y page 131).
The drive system and all the indicator lamps in the instrument cluster go out.
When the driver's door is closed, this cor-
responds to key position 1. When the driv-
er's door is open, this corresponds to key
position 0: "Key removed".
If you switch the drive system off with the
transmission in position Ror D, the transmis-
sion automatically shifts to N.
With the SmartKey: if you then open the
driver's door or the front-passenger door or
remove the SmartKey from the ignition, the
transmission automatically shifts to P.
With the Start/Stop button: if you then
open the driver's door or the front-passenger
door, the transmission automatically shifts to
P.
If you want the transmission to remain in neu- tral N, e.g. when having the vehicle cleaned in
an automatic car wash with a towing system:
Using the SmartKey:
X Switch on the ignition.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the Smart-
Key in the ignition lock. 154
ParkingDriving and parking

With the Start/Stop button:
X Remove the Start/Stop button from the
ignition lock.
X Insert the SmartKey into the ignition lock.
X Switch on the ignition.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the Smart-
Key in the ignition lock.
If you try to switch off the drive system when the transmission is not in position P:
R a message appears in the multifunction dis-
play
R a warning signal sounds Electric parking brake
General notes G
WARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the transmission out of park position
P.
R start the vehicle's drive system.
They could also operate the vehicle's equip-
ment. There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle. The function of the electric parking brake and
the parking lock is dependent on the on-board voltage. If the on-board voltage is low or if
there is a malfunction in the system, it may
not be possible to apply the released parking
brake or to shift the transmission to the P
position.
X If this is the case, only park the vehicle on
level ground and secure it to prevent it roll-
ing away.
X Shift the transmission to position P.
It may not be possible to release an applied
parking brake if the on-board voltage is low or
there is a malfunction in the system. Contact a qualified specialist workshop.
The electric parking brake carries out a func-
tion check at regular intervals when the drive
system is switched off. The sounds that can
be heard while this is occurring are normal.
Applying/releasing manually X
To engage: push handle :.
When the electric parking brake is applied, the red F(USA only) or !(Canada
only) indicator lamp lights up in the instru-
ment cluster.
The electric parking brake can also be
applied when the SmartKey is removed.
X To release: pull handle:.
The red F(USA only) or !(Canada
only) indicator lamp in the instrument clus- ter goes out. Parking
155Driving 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