If you suspect that the 12-volt battery is
damaged or defective, take it to a specialist
workshop immediately after receiving the jump-
starting aid and have it checked.
Colour
Green
Amperage
30
40
Light green
For the starting aid, suitable starting cables are
required, e.g. in accordance with DIN 72553
Previous steps
– Switch off the ignition, lights and all electrical
consumers.
(see cable manufacturer's instructions). The
mm2
cable cross-section must be at least 25
.
– Open the corresponding fuse box
If the 12-volt on-board power supply is not
functioning due to a fault in the 12-volt battery,
the hybrid vehicle can be started by means of
the starting aid if the high-voltage battery has
How to recognise a blown fuse
– Illuminate the fuse with a torch. This will
make it easier to recognise if the fuse is
blown.
→
p. 313.
– A blown fuse can be recognised by the
Changing a fuse
– If necessary, remove plastic clips
fuse box.
1 located on the housing cover
WARNING
If the jumper cables are used improperly and
the starting aid improperly, the 12-volt battery
could explode and cause serious injury. To
reduce the risk of battery explosion, be aware
of the following:
– Depending on the type of the fuse, move the pins
– Remove the fuse.
1
o
1
– If the fuse has blown, replace it with a new
fuse of the same amperage (same colour
● Any work on the 12-volt battery and the
electrical system can cause severe burns,
fire and electrical shock. Before working on
the battery, always read and observe the
relevant warnings and safety precautions →
p. 330.
engraving) and the same size →
.
and
– After inserting the new fuse, if necessary, fit
the plastic clips back into the cover.
– Mount the fuse box cover.
● The battery supplying the current must
have the same voltage (12 volts) and the
same capacity (printed on the battery) as
the discharged battery.
NOTICE
If a fuse is replaced by a fuse with a higher
rating, damage may occur elsewhere in the
electrical system
● Never charge a 12-volt battery that is
frozen or has been disconnected. When the
battery is discharged, it may freeze at
temperatures approaching 0 °C (+32 °F).
.
● Replace the 12-volt battery if it has
frozen, even if it has thawed.
Start-up aid
● During the starting aid, a highly explosive
mixture of detonating gases is produced in
the 12-volt battery. Always avoid sparks,
fire, naked flames or open flames in the
vicinity of the battery.
Introduction to the topic
If the propulsion system cannot be switched on
because the 12-volt battery is discharged, the
12-volt battery can be used for this purpose.
of another vehicle.
306
Instruction manual