2014 MERCEDES-BENZ B-CLASS SPORTS Owners Manual

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of a
positive terminal and an earth point, in the engine compartment. G
WARNING
Battery acid is caustic. There is arisk of injury.
Avoid contact with the skin, eyes or clothing. Do not inhale any battery gases. Do not lean over
the battery. Keep children away from batteries. Wash battery acid immediately with water and
seek medical attention. G
WARNING
During charging and jump-starting, explosive gases can escape from the battery. There is arisk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting. Do not lean over abattery. G
WARNING
During the charging process, abattery produces hydrogen gas. If ashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is arisk of an explosion.
R Make sure that the positive terminal of aconnected battery does not come into contact with
vehicle parts.
R Never place metal objects or tools on abattery.
R It is important that you observe the described order of the battery terminals when connecting
and disconnecting abattery.
R When jump-starting, make sure that the battery poles with identical polarity are connected.
R It is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
R Never connect or disconnectt he battery terminals while the engine is running.G
WARNING
Ad ischarged battery can freeze at temperatures below freezin gpoint .When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is arisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
! Avoid repeated and lengthy startinga ttempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
If, at low temperatures, the indicator lamps/warning lamps in the instrumentc luster do not
light up, it is highly likely that the discharged battery has frozen .Inthis case you may neither
jump-start the vehicle nor charge the battery. The service life of athawed-out battery may be
shorter. The startingc haracteristics can be impaired, particularly at low temperatures. Have
the thawed-out battery checked at aqualified specialist workshop. Jump-starting
303Breakdown assistance Z

Do not start the vehicl
eusing arapid charging device. If your vehicle's battery is discharged,
the engine can be jump-started from another vehicle or from asecond battery using jumper
cables. Observe the following points:
R The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,
jump-start the vehicle using asecond battery or ajump-starting device.
R You may only jump-start th evehicl ewhen th eenginea nd exhaust system are cold.
R Do no tstart th eengineift hebattery is frozen .Let th ebattery thaw first.
R Only jump-start from batteries wit ha12Vvoltagerating.
R Only use jumper cables whic hhave asufficien tcross-section and insulated terminal clamps.
R If the battery is full ydischarged, leave the battery that is being usedtoj ump-start connected
for afew minutes before attempting to start. This charge sthe battery slightly.
R Make sure that the two vehicles do not touch.
Make sure that:
R the jumper cables are not damaged.
R bare parts of the terminal clamp do not come into contact with other metal parts while the
jumper cables are connected to the battery.
R the jumper cables cannot come into contact with parts which can move when the engine
is running, such as the V-belt pulley or the fan.
X Secure the vehicl ebyapplying the electric parking brake.
X Shift the transmission to position P.
X Turn the SmartKey to position 0in the ignitio nlock and remove it.
X Switch off all electrical consumers, e.g. rear windo wdefroster, lighting, etc.
X Open the hood. 304
Jump-startingBreakdown assistance

Position number
0024identifies the charged batter yofthe other vehicle or an equivalent jump-
starting device.
X Press together cover 001Aof positive clamp 0010and slide it back.
X Connec tpositive terminal 0010on your vehicle to positive terminal 0023of donor battery 0024
using the jumper cable, beginning with your own battery.
X Start the engine of the donor vehicle and run it at idling speed.
X Connect negative terminal 0021of donor battery 0024to ground point 001Eof your vehicle using
the jumper cable, connectingt he jumper cable to battery of other vehicle 0024first.
X Start the engine.
X Before disconnectingt he jumper cables, let the engine run for several minutes.
X First,r emove the jumper cables from earth point 001Eand negative terminal 0021,then from
positive clamp 0010and positive terminal 0023.Begin each time at the contacts on your own
vehicle first.
X Close cover 001Aof positive terminal 0010after removing the jumper cables.
X Have the battery checked at aqualified specialist workshop.
i Jump-starting is not considered to be anormal operating condition.
i Jumper cables and further information regarding jump-starting can be obtained at any
qualified specialist workshop. Towing and tow-starting
Important safety notes
G
WARNING
Functions relevant to safety are restricted or
no longer available if:
R the engine is not running.
R the brake system or the power steerin gis
malfunctioning.
R there is amalfunction in the voltage 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 arisk of an accident.
In such cases, use atow bar. Before towing,
make sure that the steering moves freely. G
WARNING
If the weight of the vehicle to be towed or tow-
started is greater than the permissible gross
weight of your vehicle:
R the towing eye could detach itself
R the vehicle/trailer combination could
rollover.
There is arisk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the
permissible gross weight of your vehicle.
Information on your vehicle's gross vehicle
weight rating can be found on the vehicle
identification plate (Y page 346). Towing and tow-starting
305Breakdown assistance Z

!
When COLLISION PREVENTION ASSIST
PLUS, DISTRONIC PLUS or the HOLD
function is activated, the vehicle brakes
automaticallyinc ertain situations. To avoid
damage to the vehicle, deactivate these
systems in the following or similar
situations:
R when towing the vehicle
R in the car wash
! Only secure the tow rope or tow bar at the
towing eyes. Otherwise, the vehicle could
be damaged.
! Do not use the towing eyes for recovery
purposes as this could damage the vehicle.
If in doubt, recover the vehicle with acrane.
! When towing, pull aways lowlyand
smoothly. If the tractive power is too high,
the vehicles could be damaged.
! The vehicle can be towed amaximum 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.
! Vehicles with automatic transmission
must not be started by tow-starting. This
could otherwise damage the transmission.
It is better to have the vehicle transported
than to have it towed.
When towing avehicle, the transmission must
be in position N.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the SmartKey to position 2in
the ignition lock
R cannot shift the transmission to position
N.
i Disarm the automatic locking feature
before the vehicle is towed (Y page 205).You could otherwise be locked out when
pushing or towing the vehicle. Installing/removing the towing eye
Installingt he towing eye Example: towing eye mounting covers
X
Remove the towing eye from the stowage
space.
The towing eye is beneath the cargo
compartment floor with the vehicle tool kit
(Y page 294).
Vehicles with the TIREFIT kit: the towing
eye is beneath the tire inflation
compressor.
X Press the mark on cover 001Ainwards in the
direction of the arrow.
X Take cover 001Aoff the opening.
X Screw in and tighten the towing eye
clockwise to the stop.
Removing the towing eye X
Unscrew and remove the towing eye.
X Attach cover 001Ato the bumper and press
until it engages. 306
Towing and tow-startingBreakdown assistance

X
Place the towing eye in the stowage well
beneath the cargo compartment floor
(Y page 294) in the cargo compartment.
X Vehicles with the TIREFI Tkit: put back the
tire inflation compressor. Towing the vehicle with the front axle
raised
! The ignition must be switched off if the
vehicle is being towed with the fronta xle
raised .Otherwise, ESP ®
ma yintervene and
damage the brake system.
X Turn the SmartKe ytoposition 2in the
ignition lock.
X When the vehicl eisstationary, depress the
brake peda land kee pitdepressed.
X Shift the automatic transmission to
position P.
X Releas ethe brake pedal.
X Releas ethe electric parking brake.
X Switch off the automatic locking
(Y page 205).
X Switch on the hazar dwarning lamps
(Y page 107).
X Turn the SmartKe ytoposition 0in the
ignition lock and leav ethe SmartKe yinthe
ignition lock.
Observe the important safety note swhen
towing your vehicl ewitht he front axl eraised
( Y page 305). Towin
gavehicle with both axles on
th eg round
i In orde rtosignal achange of direction
when towing with the hazard warning lamps
switched on, use the combination switch as
usual.Int his case, only the indicator lamps
for the direction of travel flash. After
resettingt he combination switch, the
hazard warning lamp starts flashing again. The automatic transmission automatically
shifts to position
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 automatic transmission
stays in position Nwhen towing the vehicle,
you must observe the following points:
X Make sure that the vehicle is stationary.
X Turn the SmartKey to position 2in the
ignition lock.
X Depress and hold the brake pedal.
X Shift the automatic transmission to
position N.
X Leave the SmartKey in position 2in the
ignition lock.
X Release the brake pedal.
X Release the electric parking brake.
X Switch on the hazard warning lamps
(Y page 107).
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 305). Transporting the vehicle
! 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.
X Turn the SmartKey to position 2in the
ignition lock.
X Shift the transmission to position N.
As soon as the vehicle has been loaded:
X Prevent the vehicle from rolling away by
applying the electric parking brake.
X Shift the transmission to position P.
X Turn the SmartKey to position 0in the
ignition lock and remove it.
X Secure the vehicle.
The towing eye can be used to pull the vehicle
onto atrailer or transporter for transporting
purposes. Towing and tow-starting
307Breakdown assistance Z

Tow-starting (emergency engine
starting)
! Vehicles with automatic transmission
must not be tow-started .You could
otherwise damage the automatic
transmission. Fuses
Important safety notes
G
WARNING
If you manipulate or bridge afaulty fuse or if
you replace it with afuse with ahigher
amperage, the electric cables could be
overloaded. This could result in afire. There
is ar isk of an accident and injury.
Always replace faulty fuses with the specified
new fuses having the correc tamperage.
! 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 yourv ehicle serve to close down
faulty circuits. If afuse blows ,all the
component sonthecircuit and their functions
stop operating.
Blown fuse smust be replace dwith 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 an ewly inserted fuse also blows, have the
cause traced and rectified at aqualified
specialist workshop, e.g. an authorized
Mercedes-Ben zCenter. Befor
echanging afuse
X Secure the vehicle against rolling away
(Y page 152).
X Switc hoff all electrical consumers.
X Turn the SmartKey to position 0in the
ignition lock and remove it (Y page 137).
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
R Fuse box in the engin ecompartment on the
left-hand side of the vehicle, when viewed
in the direction of travel
R Fuse box in the front-passenger footwell
The fuse allocation chart is on the fuse box in
the front-passenger footwell (Y page 309). Fuse box in the engine compartment
G
WARNING
When the hood is open and the windshield
wipers are set in motion ,you can be injured
by the wiper linkage. There is arisk 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. 308
FusesBreakdown assistance

X
Open the hood.
X Use adry cloth to remove any moisture
from the fuse box.
X To open: open clamps 0010.
X Fold up cover 001Ain the direction of the
arrow and remove it. X
To close: check whether the seal is seated
correctly in cover 001A.
X Insert cover 001Aat the back into openings
0023 on the fuse box.
X Fold down cover 001A.
X Hook clamps 0010into the fuse box and
close.
X Close the hood. Fuse box in the front-passenger
footwell X
To open: remove the floormat from the
front-passenger side.
X Fold out perforated floor covering 001Ain the
direction of the arrow. X
To release cover 0023,press retaining
clamp 0010.
X Fold out cover 0023in the direction of the
arrow to the catch.
X Remove cover 0023forwards.
i Fuse allocation chart 0021is located on the
lower right-hand side of cover 0023.
X To close: insert cover 0023on the left-hand
side of the fuse box into the retainer.
Cover 0023engages in the retainers.
X Fold down cover 0023until clamps 0010lock
audibly.
X Fold back perforated floor covering 001A. Fuses
309Breakdown assistance Z

310