2015 MERCEDES-BENZ B-Class ELECTRIC key battery

Problems with the rear window defroster
Problem
Possible causes/consequences and
M
MSolutions The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-recircula-
tion mode
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Switching on/off X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 131).
X To activate: press theebutton.
The indicator lamp in the ebutton lights
up.
Air-recirculation mode switches on automat-
ically:
R at high outside temperatures
R at high levels of pollution
When air-recirculation mode is activated
automatically, the indicator lamp in the e
button is not lit. Outside air is added after
about 30 minutes.
X To deactivate: press theebutton.
The indicator lamp in the ebutton goes
out. i
Air-recirculation mode deactivates auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
45 ‡ (7 †)
R after approximately five minutes if the
"Cooling with air dehumidification" func-
tion is deactivated
R after approximately 30 minutes at out-
side temperatures above approximately
45 ‡ (7 †) if the cooling with air dehu-
midification function is activated Convenience opening/closing using
the air-recirculation button
G
WARNING
When using the convenience closing feature,
parts of the body could be trapped in the clos- ing area when a side window is being closed. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. Make sure that no body parts are in
close proximity during the closing procedure. G
WARNING
During convenience opening parts of the body could be drawn in or become trapped
between the side window and window frame.
There is a risk of injury.
Make sure that nobody touches the side win-
dow during the opening procedure. If some-
one becomes trapped, press the Wswitch Operating the climate control systems
123Climate control
Z

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

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.
Before commencing your journey, ensure that the charging cable required for charging the
high-voltage battery is in the vehicle. Key positions
SmartKey g
To remove the SmartKey
(shift the transmission to position P)
1 Power supply for some consumers, such
as the windshield wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the engine
i The SmartKey can be turned in the igni-
tion lock even if it is not the correct Smart- Key for the vehicle. The ignition is not
switched on. The drive system cannot be
started.
Start/Stop button General notes
Vehicles with KEYLESS-GO are equipped with
SmartKeys featuring the integrated KEYLESS- GO function and a detachable Start/Stop but-
ton. A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart- Key is in the vehicle. This occurs, for example,
when starting the drive system.
When you insert the Start/Stop button into
the ignition lock, the system needs approx-
imately two seconds recognition time. You
can then use the Start/Stop button.
Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only
the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the drive system starts
immediately.
To start the vehicle without actively using the SmartKey:
R the Start/Stop button must be inserted in
the ignition lock.
R the SmartKey must be in the vehicle.
R the vehicle must not be locked with the
SmartKey or KEYLESS-GO (Y page 73).
Do not keep the KEYLESS-GO key:
R with electronic devices, e.g. a mobile
phone or another SmartKey.
R with metallic objects, e.g. coins or metal
foil.
R inside metallic objects, e.g. a metal case.
This can affect the functionality of KEYLESS-
GO.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
R you will not be able to switch on the ignition
with the Start/Stop button.
R you will not be able to start the drive system
with the Start/Stop button until the vehicle is unlocked again.
If you lock the vehicle centrally using the but-
ton on the front door (Y page 80), you can
continue to start the drive system with the
Start/Stop button. Driving
131Driving and parking Z

Problems with the charging process
Problem
Possible causes/consequences and
M
MSolutions The charge socket flap
cannot be opened. The charge socket flap is not unlocked.
X Unlock the vehicle (Y page 72). The SmartKey batteries are discharged.
X Unlock the vehicle manually using the SmartKey (Y page 74).The charge socket flap is unlocked, but the opening mechanism is
jammed.
X Lock and unlock the vehicle.
If, after that, the opening mechanism is still jammed:
X Consult a qualified specialist workshop. The high-voltage bat-
tery is not being
charged. A malfunction has occurred during the initialization of the charging
process.
X Ensure that the charging cable is connected to the electrical
outlet.
X Remove the charging cable connector from the vehicle socket
and wait 30 seconds; then re-insert it into the vehicle socket.
X If the problem persists, consult a qualified specialist workshop. The high-voltage bat-
tery is not charged dur-
ing the charging proc-
ess when connected to
a power socket. The electrical outlet is faulty.
X Have the electrical outlet checked to test if it is functioning
properly.
or
X Use a different electrical outlet. The charging cable con-
nector cannot be
removed from the vehi- cle socket. The snap fastener on the charging cable connector is locked.
X Press and hold the button on the charging cable connector. The
snap fastener on the vehicle socket is unlocked.
X Remove the charging cable connector from the vehicle socket. The snap fastener on the charging cable connector is blocked.
X Press and hold the button on the charging cable connector.
X Try to remove the blockage. High-voltage battery
151Driving and parking Z

The electric parking brake can only be
released:
R when the SmartKey is in position 1or 2in
the ignition lock (Y page 131) or
R if the ignition was switched on using the
Start/Stop button
Applying automatically When the vehicle's HOLD function is holding
the vehicle at a standstill, the electric parking brake is engaged automatically.
In addition, at least one of the following con-
ditions must be fulfilled:
R the drive system is switched off.
R the driver's door is open and the seat belt is
not fastened.
R there is a system malfunction.
R the power supply is insufficient.
R the vehicle is stationary for a lengthy
period.
The red F(USA only) or !(Canada
only) indicator lamp in the instrument cluster
lights up.
Releasing automatically Your vehicle's electric parking brake is auto-
matically released if all of the following con-
ditions are met:
R the vehicle has been started.
R the transmission is in position Dor R.
R the seat belt has been fastened.
R you depress the accelerator pedal.
If the transmission is in position R, the tailgate
must be closed.
If your seat belt is not fastened, the following conditions must be fulfilled to automatically
release the electric parking brake:
R the driver's door is closed.
R you have shifted out of transmission posi-
tion Por you have previously driven faster
than 2 mph (3 km/h). Ensure that you do not depress the acceler-
ator pedal unintentionally. Otherwise the
parking brake will be released and the vehicle
will start to move.
Emergency braking The vehicle can also be braked during an
emergency by using the electric parking
brake.
X While driving, push handle :of the electric
parking brake (Y page 155).
The vehicle is braked as long as you keep
handle :of the electric parking brake
pressed. The longer the electric parking
brake handle :is depressed, the greater
the braking force.
During braking:
R a warning tone sounds
R the Please Release Parking Brake Please Release Parking Brake
message appears
R the red F(USA only) or !(Canada
only) indicator lamp in the instrument clus-
ter flashes
When the vehicle has been braked to a stand-
still, the electric parking brake is applied. Parking the vehicle for a long period
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
If you leave the vehicle parked for longer than six weeks, the vehicle may suffer damage as a
result of lack of use.
X Visit a qualified specialist workshop and
seek advice.
i You can obtain information about trickle
chargers from a qualified specialist work-
shop. 156
ParkingDriving and parking

Selecting the departure time
X Press the =or; button on the steer-
ing wheel to select the Sett.
Sett.menu.
X Press 9or: on the steering wheel
to select the E‑CELL
E‑CELL menu.
X Press 9or: to select Depart.
Depart.
Time
Time.
X Press ato confirm.
X Press the :or9 button to select
one of the three departure times or Timer
Timer
Off
Off (no timer active).
X Press ato confirm.
Charging with RANGE PLUS
If you have engaged Pand the charging cable
is connected, the on-board computer dis-
plays:
R the expected charge time of the high-volt-
age battery or
R the RANGE PLUS condition of charge for
the departure time set
RANGE PLUS charges when:
R you have activated RANGE PLUS via the
center console prior to charging and
R the high-voltage battery is fully charged
If charging is not complete by departure time,
the maximum range will notbe available. Example:
R Set departure time: 6:41 a.m.
R End time for standard high-voltage battery
charging: 6:00 a.m.
R RANGE PLUS condition of charge at
6:41 a.m.: half of the additional range
R The maximum additional range is
decreased by 50 percent. Pre-entry climate control at time of depar-
ture
If you activate the "Rem. Climate Control at
departure time" function, the vehicle interior
is heated or cooled prior to a desired depar-
ture time.
i To heat or cool the vehicle interior for a
desired departure time, the high-voltage
battery must be sufficiently charged. Acti-
vate the climate control function primarily
when the high-voltage battery is being
charged. You must also set a departure
time using the E-CELL
E-CELL submenu
(Y page 195).
Switching "Pre-entry climate control at depar-
ture time" on/off
X Press the =or; button on the steer-
ing wheel to select the Sett. Sett.menu.
X Use 9 or: to select the E-CELL
E-CELL
submenu.
X Press ato confirm.
X Press 9or: to select Rem. Cli‐
Rem. Cli‐
mate Control At Departure Time:
mate Control At Departure Time:.
X Press ato activate or deactivate.
The vehicle interior will then be heated or
cooled prior to the predefined departure
time.
If a departure time is selected, the yellow
indicator lamp lights up on the auxiliary
heating button.
You can use the on-board computer to specify up to three departure times in the E-CELL E-CELL
submenu. One of the specified departure
times may be preselected (Y page 195).
Pre-entry climate control (via SmartKey)
Pre-entry climate control (via SmartKey) is
switched on temporarily when the vehicle is
unlocked using the SmartKey. In order to
switch on pre-entry climate control via the
SmartKey, the function has to be activated
using the on-board computer. 196
Menus and submenusOn-board computer and displays

Activating/deactivating pre-entry climate
control (via SmartKey)
X Press the =or; button on the steer-
ing wheel to select the Sett.
Sett. menu.
X Use 9 or: to select the E-CELL
E-CELL
submenu.
X Press ato confirm.
X Press 9or: to select Pre-Entry
Pre-Entry
Climate Cont. (Via Key):
Climate Cont. (Via Key):.
X Press ato activate or deactivate.
If pre-entry climate control (via SmartKey)
is activated, pre-entry climate control (via
SmartKey) is switched on temporarily when
you unlock the vehicle.
Setting the maximum charge current
Before charging the high-voltage battery,
check the maximum permissible charge cur-
rent for the relevant power socket.
You can set a maximum charge current in the
E-CELL E-CELL menu.
It is only necessary to select the maximum
charge current if there are no charge current
settings on the charging cable.
i The maximum charge current values in
the on-board computer may deviate from
the charging cable values. Example: changing the charge current
:
Sets the maximum charge current
i This menu is not available in some coun-
tries. In this case, the maximum charge
current for the power socket is limited to a fixed level, depending on the country con-
cerned. X
Press the =or; button on the steer-
ing wheel to select the Sett.
Sett. menu.
X Use 9 or: to select the E-CELL E-CELL
submenu.
X Press the 9or: button to select
Max. Charge Current
Max. Charge Current.
X Press ato confirm.
X Press 9or: in the submenu to
select desired maximum charge cur-
rent :.
X Press the abutton on the multifunction
steering wheel to confirm.
The high-voltage battery is charged with
the selected maximum charge current.
Instrument cluster Unit of measurement for distance
The
Display Unit Speed-/Odometer: Display Unit Speed-/Odometer:
function allows you to choose whether cer-
tain displays appear in kilometers or miles in the multifunction display.
X Press the =or; button on the steer-
ing wheel to select the Sett. Sett.menu.
X Press the :or9 button to select the
Instrument Cluster
Instrument Cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Display Unit Speed-/Odometer
Display Unit Speed-/Odometer func-
tion.
You will see the selected setting: km kmor
miles
miles.
X Press the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
R digital speedometer in the Trip
Trip menu
R odometer and the trip odometer
R trip computer
R current energy consumption and approxi-
mate range
R navigation instructions in the Navi
Navi menu
R cruise control
R ASSYST PLUS service interval display Menus and submenus
197On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Hazard Warning
Hazard Warning
Flashers Malfunc‐ Flashers Malfunc‐
tioning tioning The hazard warning lamps are faulty.
X Visit a qualified specialist workshop. î
Charger Cable Con‐ Charger Cable Con‐
nected nected The charging cable is still connected to the vehicle socket.
X Remove the charging cable from vehicle socket. SmartKey
Display messages
Possible causes/consequences and
M
MSolutions Â
Key Does Not Key Does Not
Belong to Vehicle Belong to Vehicle You have put the wrong SmartKey in the ignition lock.
X Use the correct SmartKey. Â
Take Take
Your
YourKey
Keyfrom
from
Ignition
Ignition The SmartKey is in the ignition lock.
X Remove the SmartKey. Â
Obtain a New Key Obtain a New Key The SmartKey needs to be replaced.
X Visit a qualified specialist workshop. Â
Replace Replace
Key
KeyBattery
Battery The SmartKey battery is discharged.
X Change the battery (Y page 75).Â
Don't Forget Your Don't Forget Your
Key Key The display message is shown for a maximum of 60 seconds and
is only a reminder.
You open the driver's door with the drive system switched off. The SmartKey is not in the ignition lock.
X Take the SmartKey with you when you leave the vehicle. Â
Key Not Detected Key Not Detected
(red display message) The SmartKey is not in the vehicle.
A warning tone also sounds.
If the drive system is switched off, you can no longer lock the
vehicle centrally or start the drive system.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 153).
X Locate the SmartKey. 226
Display
messagesOn-board computer and displays