2015 MERCEDES-BENZ B-Class ELECTRIC air condition

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 25). Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise fog up.
To prevent the windows from fogging up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air dehumidifi-
cation function
R switch on the defrost windshield function
briefly, if required
The automatic climate control regulates the
temperature and the humidity in the vehicle
interior and filters undesirable substances
out of the air.
Dual-zone automatic climate control is only
operational when the vehicle is ready to drive. Optimum operation is only achieved with the
side windows closed.
Always keep the ventilation flaps behind the
side paneling in the cargo compartment clear.
Otherwise the vehicle will not be ventilated
correctly.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 84). This
will speed up the cooling process and the desired interior temperature will be
reached more quickly.
i The integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol-
lutants and odors. A clogged filter reduces
the amount of air supplied to the vehicle
interior. For this reason, you should always observe the interval for replacing the filter,which is specified in the Maintenance
Booklet. As it depends on environmental
conditions, e.g. heavy air pollution, the
interval may be shorter than stated in the
Maintenance Booklet.
i It is possible that under certain circum-
stances the residual heat function may be
activated automatically an hour after the
SmartKey has been removed in order to dry the automatic climate control. The vehicle
is then ventilated for 30 minutes. 116
Overview of climate control systemsClimate control

immediately to open/close the side window
in the door. The side window stops. To con-
tinue closing the side window, pull on the
W switch.
X Convenience closing feature: press and
hold the ebutton until the side win-
dows are closed.
The indicator lamp in the ebutton lights
up. Air-recirculation mode is activated.
If parts of the body are in the closing area
during convenience closing, proceed as fol-
lows:
X Press the Wbutton for opening/closing
the side windows.
The side window stops.
X To then open the side windows, press the
W button again.
or X Press the ebutton for longer than two
seconds.
The side windows move in the opposite
direction.
X Convenience opening feature: press and
hold the ebutton until the side win-
dows are opened. The side windows move
back to their original positions.
The indicator lamp in the ebutton goes
out. Air-recirculation mode is deactivated.
Notes on the automatic reversing feature for
the side windows (Y page 83).
If you open the side windows manually after
closing them with the convenience closing
feature, they will remain in this position when
opened using the convenience opening fea-
ture. Pre-entry climate control via Smart-
Key
Before getting in, the vehicle interior can be
briefly warmed or ventilated in advance. In
addition, the air from the air vent can be pre-
cooled. The high-voltage battery must be sufficiently
charged before the pre-entry climate control
(via SmartKey) can be activated.
Activating/deactivating the pre-entry cli-
mate control (via SmartKey)
When the vehicle is unlocked using the Smart-
Key or KEYLESS-GO, the climate control func-
tions are activated.
The pre-cooling and pre-heating climate con- trol functions last 5 minutes.
When the vehicle is pre-cooled, the following
functions are activated as necessary:
R Climate control system
R Cooling with air dehumidification
R Blower
When the vehicle is pre-heated, the following functions are activated as necessary:
R Climate control system
R Blower
R Seat heating
R Windshield heating
R Rear window defroster
Pre-entry climate control is automatically
switched off when operational readiness
mode is requested.
Activating/deactivating pre-entry cli-
mate control (via SmartKey)
You can activate and deactivate pre-entry cli-
mate control (via SmartKey) via the on-board
computer in the E-CELL
E-CELL submenu
(Y page 196).
i If the condition of charge of the high-volt-
age battery is below the specified minimum
condition of charge, pre-entry climate con- trol will not be activated even if it has been
set. 124
Operating the climate control systemsClimate control

Pre-entry climate control at departure
time and immediate pre-entry climate control
Important safety notes G
WARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
General notes Using the "Pre-entry climate control at depar-
ture time" function, you can cool or heat the
vehicle interior prior to the desired departure time.
When using the "Pre-entry climate control at
departure time" function, the condition of
charge of the high-voltage battery must be
higher than the specified minimum condition of charge.
The running time of the climate control may
be reduced if:
R the vehicle is not connected to an electric
power supply
R the high-voltage battery is not fully charged
With active "Pre-entry climate control at
departure time" the condition of charge of the
high-voltage battery can be reduced, even if
the charge cable connector is connected.
In certain situations, the desired interior tem-
perature cannot be reached.
When the vehicle is cooled, the following
functions are activated as necessary:
R Climate control system
R Cooling with air dehumidification
R Blower
When the vehicle is heated, the following
functions are activated as necessary:
R Climate control system
R Blower
R Seat heating R
Windshield heating
R Rear window defroster
"Immediate pre-entry climate control" is auto-
matically switched off when operational read- iness mode is requested.
Setting the departure time You can set a departure time for the "Pre-
entry climate control at departure time". Your
vehicle will then be cooled or heated until the desired temperature is reached in time for the
set departure time. "Pre-entry climate control at departure time" will be activated a maxi-
mum of 35 minutes before departure. If the
departure is delayed, the vehicle will be
heated or cooled for a further five minutes.
You can set the desired departure time in the
E-CELL E-CELL submenu on the on-board computer
(Y page 195).
Activating immediate pre-entry climate
control You can activate "Immediate pre-entry cli-
mate control" even if the vehicle interior is
already at the desired temperature. This
means that the vehicle interior continues to
be cooled or heated, e.g. if the journey is
interrupted for up to 50 minutes, and the inte-
rior temperature is kept constant. You can
only set the desired temperature using the
climate control unit. If you do not pre-select a temperature, the last temperature set will be
automatically adopted. Operating the climate control systems
125Climate control Z

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 25). Notes on breaking-in a new vehicle
The sensor system of some driving and driv-
ing safety systems adjusts automatically
while a certain distance is being driven after
the vehicle has been delivered or after
repairs. Full system effectiveness is not
reached until the end of this teach-in proce-
dure.
New and replaced brake pads and discs only
reach their optimum braking effect after sev-
eral hundred kilometers of driving. Compen-
sate for this by applying greater force to the
brake pedal. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell can restrict the pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use loose floormats and do not place floormats on
top of one another. G
WARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parking brake has not been fully
released when driving, the parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Before driving away, you must ensure
that, for your own safety and to avoid dam-
age, the charging cable has been removed
from the vehicle socket. Otherwise, you
cannot shift the transmission out of posi-
tion P.
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 130
DrivingDriving and parking

Drive program
Sis characterized by the fol-
lowing:
R the vehicle exhibits sporty driving charac-
teristics.
R the entire power output can be utilized by
depressing the accelerator pedal.
Drive program E+is characterized by the fol-
lowing:
R reduced torque and significantly reduced
power. This supports an especially efficient
and even driving style and results in a
reduction in speed to approximately
70 mph (110 km/h).
R the vehicle pulling away more gently in
forward gear unless the accelerator pedal
is depressed fully.
R the wheels are less likely to spin.
R particularly efficient overrun.
R full power output by using kickdown.
R the performance of air-conditioning system
and heating are reduced. Steering wheel paddle shifters
Manually adjustable recuperation :
Left-hand steering wheel paddle shifter -
; Right-hand steering wheel paddle shifter
+
You can increase or reduce recuperation in
overrun mode using the steering wheel pad-
dle shifters. When you remove your foot from
the accelerator pedal, recuperation occurs.
The electric motor is then used as a alternator and energy is recovered while driving. The
recuperated electrical energy is stored in the
high-voltage battery. A higher energy recu-
peration level means that the vehicle is
braked more powerfully.
If necessary, counteract the reduced regen-
erative braking effect by applying the brake
yourself.
Information on the Recuperative Braking Sys-
tem (Y page 68).
X To decrease recuperation: pull right-hand
steering wheel paddle shifter ;.
X To increase recuperation: pull left-hand
steering wheel paddle shifter :.
The various recuperation levels are shown in
the transmission position display once Dhas
been selected (Y page 134).
The following recuperation levels are availa-
ble in overrun mode:
R no recuperation (D +
, coasting mode)
R moderate recuperation (D)
R high recuperation (D -
)
R recuperation depending on the traffic sit-
uation (D AUTO
, radar-based)
You can see the intensity of recuperation in
overrun mode by reading the recuperation
performance value shown in the power dis-
play (Y page 183).
Every time drive position Dis selected, the
transmission switches into recuperation level
D AUTO
automatically.
The various different levels are to be used
under the following conditions: D
+ Driving without much braking
and without the presence of
obstacles or sharp bends
The vehicle retains the maxi-
mum possible amount of kinetic
energy. D
Normal driving138
TransmissionDriving an
d parking

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

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

X
Hold test gage Avertically on brake
disc :and slide measuring pin ;onto
brake disc :.
X Check which color field ?the arrow on
measuring pin ;is pointing to.
Green: the brake pad/lining thickness is
sufficient.
Red: the brake pad/lining thickness is not
sufficient. Have the brake pads/lining
checked at a qualified specialist workshop.
To avoid an inaccurate measurement:
R make sure you position the wheels suitably
R do not put the measuring pin on a recess in
the brake disc Driving on wet roads
Hydroplaning If water has accumulated to a certain depth
on the road surface, there is a danger of
hydroplaning occurring, even if:
R
you drive at low speeds.
R the tires have adequate tread depth.
For this reason, in the event of heavy rain or in conditions in which hydroplaning may occur,
you must drive in the following manner:
R lower your speed.
R avoid ruts.
R avoid sudden steering movements.
R brake carefully.
Driving on flooded roads !
Do not drive through flooded areas.
Check the depth of any water before driving through it. Drive slowly through standing
water. Otherwise, water may enter the
vehicle interior or the engine compartment.
This can damage the electronic compo-
nents in the engine or the automatic trans- mission. Water can also be drawn in by the
engine's air suction nozzles and this can
cause engine damage. Winter driving
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.
At the onset of winter, have your vehicle win- terized at a qualified specialist workshop, e.g.
at an authorized Mercedes-Benz Center.
Drive particularly carefully on slippery road
surfaces. Avoid sudden acceleration, steering
and braking maneuvers. Do not use cruise
control.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the DIRECT SELECT lever to position
N.
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
For more information on driving with snow
chains, see (Y page 303).
For more information on driving with summer tires, see (Y page 302).
Observe the notes in the "Winter operation"
section (Y page 302). Driving tips
161Driving and parking Z