2014 MERCEDES-BENZ B-CLASS SPORTS jump start

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