MERCEDES-BENZ B-Class ELECTRIC 2016 W246 Owner's Manual

Risk of explosion.
Fire, open flames and smoking are
prohibited when handlingthe bat-
tery. Avoid creating sparks.
Battery acid is caustic. Avoid con-
tact with skin, eyes or clothing.
Wear suitable protective clothing,
especially gloves, apron and face-
guard.
Rinse any acid spills immediately
with clear water. Contac taphysi-
cian if necessary.
Wear eye protection.
Keep children away.
Observe this Operator's Manual.
Fo r safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries provide
increased impact protection to preven t vehi-
cle occupants from suffering acid burns
should the battery be damaged in the event of
an accident.
In order for the battery to achieve the maxi-
mum possible service life, it must always be
sufficiently charged.
Like other batteries, the vehicle battery may
discharge over time if you do not use the
vehicle. In this case, have the battery discon-
nected at a qualified specialist workshop. You
can also charge the battery withacharger
recommended by Mercedes-Benz. Contac ta
qualified specialist workshop for further infor- mation. Have
the battery condition of charge checked
more frequently if you use the vehicle mainly
for short trips or if you leave it standing idle
for a lengthy period. Consult a qualified spe-
cialist workshop if you wish to leave your
vehicle parked for a long period of time.
Only replace a battery withabattery that has
been recommended by Mercedes-Benz.
Remove th eSm artKe
y if you park the vehicle
and do not require any electrical consumers.
The vehicle will then use very little energy,
thus conservin g battery power.
Afte r an interruption to the power supply, e.g.
due to a discharged battery, you must reset
th e clock using Audio 20 or COMAND. You
can find further information in the separate
operating instructions.
Charging the 12 ‑volt battery
GWARNING
During chargin g and jump-starting, explosive
gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do no t lean overabattery.
GWARNING
Battery aci d is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
no t inhale any battery gases. Do not lean over
th e battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion .
GWARNING
A discharged battery can freeze at tempera-
tures below freezing point. When jump-start-
ing the vehicle or charging the battery, gases
can escape from the battery. There is a risk of
an explosion.
Batteries289
Breakdown assistance
Z

Allow the frozen battery to thaw out before
charging it or jump-starting.
!Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
!Onlycharge the battery using the jump-
starting connection point.
The jump-starting connection point is in the
engine compartment (
Ypage 292).
XOpen the hood.
XConnect the battery charger to the positive terminal and ground point in the same
order as when connecting the donor bat-
tery in the jump-starting procedure
(
Ypage 292).
If the indicator/warning lamps do not light up
at low temperatures, it is very likely that the
discharged battery has frozen. In this case
you may neither jump-start the vehicle nor
charge the battery. The service life of a
thawed-out battery may be shorter. The start-
ing characteristics can be impaired, particu-
larly at low temperatures. Have the thawed-
out battery checked at a qualified specialist
workshop.
Only charge the installed battery with a bat-
tery charger which has been tested and
approved by Mercedes-Benz. A battery
charger unit specially adapted for Mercedes-
Benz vehicles and tested and approved by
Mercedes-Benz is available as an accessory.
It permits the charging of the battery in its
installed position. Contact an authorized
Mercedes-Benz Center for further informa-
tion and availability. Read the battery charg-
er's ope rating instructions before charging
the battery.
High-voltage battery – important
safety notes
GDANGER
The vehicle's high-voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and
the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
GWARNING
In the event of a vehicle fire, the internal pres- sure of the high-voltage battery can exceed a
critical value. In this case flammable gas
escapes through a ventilation valve on the
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger zone immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
The vehicle's high voltage electrical system is
under high voltage.
RDo not handle high-voltage components orthe orange cables of the vehicle's high-volt-
age electrical system.
RDo 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.
RDo not touch any damaged components or
the damaged orange cables of the vehicle's
high-voltage electrical system.
RDo not remove the covers of the high-volt-
age electrical system components that are
marked with a warning sticker.
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 (
Ypage 184).
If you park the vehicle and leave it stationary
for longer periods, connect it to a power sup-
ply.
290Batteries
Breakdown assistance

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 thansix weeks, the vehicle may suffer damage as a
result of lack of use.
XVisit a qualified specialist workshop and
seek advice.
iYou can obtain information about trickle
chargers from a qualified specialist work-
shop.
iVery low or very high outside tempera-
tures can impair the function of the high-
voltage battery (
Ypage 143). This can also
occur when the vehicle engine is switched
off (
Ypage 143).
Batteries291
Breakdown assistance
Z

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of a
positive terminal and a ground point, in the engine compartment.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over a battery.
GWARNING
During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks
are created, the hydrogen gas can ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a connected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools on a battery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnecting a battery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnect the battery terminals while the engine is running.
GWARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion. Allow the frozen battery to thaw out before charging it or jump-starting.
!Avoid repeated and lengthy starting attempts.
Do not use a rapid-charging device to start the engine.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the
discharged battery has frozen. In this case you may neither jump-start the vehicle nor charge the battery. The service life of a thawed-out battery may be shorter. Have the thawed-out
battery checked at a qualified specialist workshop.
If the 12 V battery is discharged, or after the vehicle has been jump-started, the Service
RequiredDoNotShiftGearsVisitDealermessage appears. There is a malfunction in
the on-board voltage. Visit a qualified specialist workshop immediately.
292Jump-starting
Breakdown assistance

The drive system cannot be started if the 12 V battery is discharged. This is not dependent on
whether the high-voltage battery is charged or not. The vehicle cannot be jump-started if the
high-voltage battery is discharged. The high-voltage battery must be charged first.
The drive system can be started using another vehicle.
ROnly use batteries with an equal nominal voltage (12 volts).
RMake sure that the battery of the donor vehicle does not have a significantly lower capacitythan the discharged battery.
RUse jumper cables with a sufficient cross-section and insulated terminal clamps from a
qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.
RMake sure that the two vehicles do not touch.
RRoute the jumper cables so that they cannot be caught by rotating components in the engine
compartment.
RDo not disconnect the discharged battery from the vehicle's electrical system.
XSwitch off the engine of both vehicles.
XShift the transmission to position P.
XSwitch off all electrical consumers.
XRemove battery cover:.
XConnect positive terminal ;on the vehicle with the flat battery to positive terminal =of the
donor vehicle using the red jumper cable. Begin with the flat battery.
XConnect negative terminal ?of the donor vehicle to negative terminal Aof the vehicle with
the flat battery using the black jumper cable, beginning with donor vehicle's battery B.
XStart the engine of the donor vehicle and run it at idling speed.
XSwitch on the ignition in the vehicle with the flat battery.
XIf the drive system cannot be activated immediately, wait for approximately 60 seconds
between starting attempts.
If the drive system does not start, call a breakdown service.
Jump-starting293
Breakdown assistance
Z

iJumper cables and further information regarding jump-starting can be obtained at any
qualified specialist workshop.
Towing
Important safety notes
GWARNING
Functions relevant to safety are restricted or
no longer available if:
Rthe ignition is switched off
Rthe brake system or the power steering is
malfunctioning
Rthere is a malfunction in the power supply
or the vehicle's electrical system
If your vehicle is being towed, much more
force may be necessary to steer or brake.
There is a risk of an accident.
In such cases, use a tow bar. Before towing,
make sure that the steering moves freely.
GWARNING
You can no longer steer the vehicle if the
steering wheel lock has been engaged. There
is a risk of an accident.
Always switch off the ignition when towing the
vehicle with a tow cable or a tow bar.
GWARNING
When towing or tow-starting another vehicle
and its weight is greater than the permissible
gross weight of your vehicle, the:
Rthe towing eye could detach itself
Rthe vehicle/trailer combination could roll-
over.
There is a risk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the per- missible gross weight of your vehicle.
Details on the permissible gross vehicle
weight of your vehicle can be found on the
vehicle identification plate (
Ypage 334).
!When COLLISION PREVENTION ASSIST
PLUS or the HOLD function is activated, the
vehicle brakes automatically in certain sit-
uations. To avoid damage to the vehicle,
deactivate these systems in the following
or similar situations:
Rwhen towing the vehicle
Rin the car wash
!Make sure that the electric parking brake
is released. If the electric parking brake is
faulty, visit a qualified specialist workshop.
Mercedes-Benz recommends that you use
an authorized Mercedes-Benz Center for
this purpose.
!Only secure the tow rope or tow bar at the
towing eyes. Otherwise, the vehicle could
be damaged.
!Observe the following points when towing
with a tow rope:
RSecure the tow rope on the same side on
both vehicles.
REnsure that the t ow cable is not longer
than legally permitted. Mark the tow
cable in the middle, e.g. with a white
cloth (30 x 30 cm). This will make other
road users aware that the vehicle is being
towed.
ROnly secure the tow cable to the towing
eye.
RObserve the brake lamps of the towing
vehicle while driving. Always maintain a
distance so that the tow rope does not
sag.
RDo not use steel cables or chains to tow
your vehicle. You could otherwise dam-
age the vehicle.
!Do not use the towing eyes for recovery
purposes as this could damage the vehicle. If in doubt, recover the vehicle with a crane.
294Towing
Breakdown assistance

!When towing, pull away slowly and
smoothly. If the tractive power is too high,
the vehicles could be damaged.
!The vehicle can be towed a maximum of
30 miles (50km). The towing speed of
30 mph (50km/h) must not be exceeded.
If the vehicle has to be towed more than
30 miles (50km), the front axle must be
raised or the entire vehicle raised and
transported.
!Do not tow with sling-type equipment.
This could damage the vehicle.
!To tow vehicles with KEYLESS-GO, use
the SmartKey instead of the Start/Stop
button. The transmission may otherwise
shift to position Pwhen you open the driv-
er's or front-passenger door, which could
damage the transmission.
Observe the legal requirements for the rele-
vant countries when towing away.
Make sure that no charging cable is plugged
in. The parking lock cannot be released if a
charging cable is plugged in.
It is better to have the vehicle transported
than to have it towed away.
If the vehicle can no longer be driven because
of an accident or breakdown, you have the
following options:
RTransporting the vehicle
As a rule, you should have the vehicle trans-
ported.
RTowing the vehicle with a tow rope or tow
bar
Only tow the vehicle in exceptional cases.
Observe the following notes.
The vehicle may not be towed and must
always be transported if:
Rthe multifunction display is not working
Rone of more of the following warning lamps
is lit up:
-Drive system
-12 V battery
Rone or both of the following display mes-
sages have appeared:
-Stop Switch Engine off
-Do Not Shift Gears Visit Dealer
Ryou have to tow the vehicle over a longer
distance than 30 miles (50 km).
The battery must be connected and charged.
Otherwise, you:
Rcannot turn the SmartKey to position 2in
the ignition lock
Rcannot release the electric parking brake
Rcannot shift the transmission to position N
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 there is a
system malfunction, it is possible that:
Rthe electric parking brake may not be
applied in certain circumstances, or
Rthe transmission may not be shifted to P
Switch off non-essential consumers, e.g. the
radio.
Disarm the automatic locking feature before
the vehicle is towed (
Ypage 198). You could
otherwise be locked out when pushing or
towing the vehicle.
Towing295
Breakdown assistance
Z

Installing/removing the towing eye
Installing the towing eye
The brackets for the screw-in towing eye are
located in the bumpers. They are at the rear
and at the front, under covers :.
XRemove the towing eye from the stowage
space.
The towing eye is located in the stowage
well under the cargo compartment floor.
Vehicles with the TIREFIT kit: the to wing
eye is beneath the tire inflation compres-
sor.
XPress the mark on cover :inwards in the
direction of the arrow.
XTake cover :off the opening.
XScrew in the towing eye clockwise to the
stop.
Removing the towing eye
XUnscrew and remove the towing eye.
XPlace the towing eye in the stowage well
beneath the cargo compartment floor in
the cargo compartment (
Ypage 282).
XVehicles with the TIREFIT kit: put back the
tire inflation compressor.
Towing a vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(
Ypage 294).
XOn vehicles with KEYLESS-GO or the
KEYLESS-GO start function: you must
use the SmartKey instead of the Start /S top
button (
Ypage 132).
The transmission automatically shifts to posi-
tion Pwhen you open the driver's or front-
passenger door or when you remove the
Sm artKey from the ignition lock. In order to
ensure that the transmission stays in position
N when towing the vehicle, you must observe
the following points:
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 2in the igni-
tion lock.
XDepress and hold the brake pedal.
XSh ift the transmission to position N.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch on the hazard warning lamps
(
Ypage 102).
XLeave the SmartKey in position 2in the
ignition lock.
If the 12 V battery indicator lamp lights up,
you must observe the following points:
XPull over and stop the vehicle safely as soon
as possible, paying attention to road and
traff iccond itions.
XShift the transmission to position P.
XApply the electric parking brake.
iIn order to signal a change of direction
when towing the vehicle with the hazard
warning lamps switched on, use the com-
bination switch as usual. In this case, only
the indicator lamps for the direction of
travel flash. After resetting the combina-
tion switch, the hazard warning lamp starts
flashing again.
296Towing
Breakdown assistance

Towing the vehicle with the front axle
raised
Observe the important safety notes when
towing your vehicle with the front axle raised
(
Ypage 294).
!The ignition must be switched off if the
vehicle is being towed with the front axle
raised. Otherwise, ESP
®may intervene and
damage the brake system.
XOn vehicles with KEYLESS-GO or the
KEYLESS-GO start function: you must
use the SmartKey instead of the Start/Stop button (
Ypage 132).
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 2in the igni-
tion lock.
XWhen the vehicle is stationary, depress the
brake pedal and keep it depressed.
XShift the transmission to position P.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch off the automatic locking
(
Ypage 198).
XSwitch on the hazard warning lamps
(
Ypage 102).
XTurn the SmartKey in the ignition lock to
position 0and leave the SmartKey in the
ignition lock.
Towing the vehicle with the rear axle
raised
When towing your vehicle with the rear axle
raised, it is important that you observe the
safety instructions (
Ypage 294).
!The ignition must be switched off if you
are towing the vehicle with the rear axle
raised. Intervention by ESP
®could other-
wise damage the brake system. The transmission automatically shifts to posi-
tion
Pwhen you open the driver's or front-
passenger door or when you remove the
SmartKey from the ignition lock. In order to
ensure that the transmission stays in position
N when towing the vehicle, you must observe
the following points:
XOn vehicles with KEYLESS-GO or the
KEYLESS-GO start function: you must
use the SmartKey instead of the Start/Stop
button (
Ypage 132).
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 2in the igni-
tion lock.
XDepress and hold the brake pedal.
XShift the transmission to position N.
XRelease the brake pedal.
XApply the electric parking brake.
XSwitch off the automatic locking
(
Ypage 198).
XBring the front wheels into the straight-
ahead position.
XSwitch on the hazard warning lamps
(
Ypage 102).
XTurn the SmartKey in the ignition lock to
position0and leave the SmartKey in the
ignition lock.
Transporting the vehicle
All vehicles
!You may only secure the vehicle by the
wheels, not by parts of the vehicle such as
axle or steering components. Otherwise,
the vehicle could be damaged.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 131).
XShift the transmission to position N.
As soon as the vehicle has been loaded:
XPrevent the vehicle from rolling away by
applying the electric parking brake.
XShift the transmission to position P.
Towing297
Breakdown assistance
Z

XTurn the SmartKey to position0in the igni-
tion lock and remove it.
XSecure the vehicle.
The towing eye can be used to pull the vehicle
onto a trailer or transporter for transporting
purposes.
Fuses
Important safety notes
GWARNING
If you manipulate or bridge a faulty fuse or if
you replace it with a fuse with a higher amper- age, the electric cables could be overloaded.
This could result in a fire. There is a risk of an
accident and injury.
Always replace faulty fuses with the specified
new fuses having the correct amperage.
Blown fuses must be replaced with fuses of
the same rating, which you can recognize by
the color and value. The fuse ratings are listed
in the fuse allocation chart.
If a newly inserted fuse also blows, have the
cause traced and rectified at a qualified spe-
cialist workshop, e.g. an authorized
Mercedes-Benz Center.
!Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correct fuse rating for the system
concerned. Only use fuses marked with an
"S". Otherwise, components or systems
could be damaged.
The fuses in your vehicle serve to close down
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions stop
operating.
Before changing a fuse
XSecure the vehicle against rolling away
(
Ypage 153).
XSwitch off all electrical consumers.
XVehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.
XVehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: open the driver's
door.
The on-board electronics now have status
0. This is the same as the SmartKey having
been removed.
The fuses are located in various fuse boxes:
RFuse box in the engine compartment on the
left-hand side of the vehicle, when viewed
in the direction of travel
RFuse box in the front-passenger footwell
The fuse allocation chart is on the fuse box in
the front-passenger footwell (
Ypage 299).
Fuse box in the engine compartment
GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
!Make sure that no moisture can enter the
fuse box when the cover is open.
!When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
seeping in or dirt could otherwise impair
the operation of the fuses.
298Fuses
Breakdown assistance