The essentials
2. Connect one end of the re
d jump l
ead to
the positive + terminal of the vehicle
w ith the fl
at b
attery A
› ››
Fig. 70
.
3. C
onnect the other end of the red jump
l
ead to the positive terminal + in the ve-
hic l
e pr o
viding assistance B .
4. For vehicles without Start-Stop system:
connect
one end of the
b
lack jump lead to
the negative terminal – of the vehicle
pr o
vidin
g the current B
› ››
Fig. 70
.
– For
vehicles with Start-Stop system: con-
nect one end of the b
lack jump lead X to a
s uit
abl
e ground terminal, to a solid piece of
metal in the engine block, or to the engine
block itself ››› Fig. 71.
5. Connect the other end of the black jump
l
ead X to a solid metal component bolted
t o the en
gine bloc
k or to the engine block
itself of the vehicle with the flat battery.
Do not connect it to a point near the bat-
tery A .
6. Position the leads in such a way that they cannot
come int
o contact with any moving
parts in the engine compartment.
Starting
7. Start the engine of the vehicle with the boosting b
attery and let it run at idling
speed. 8. Start the engine of the vehicle with the flat
battery
and wait for 2 or 3 minutes until
the engine is running.
Removing the jump leads
9. Before you remove the jump leads, switch off the dipped beam he
adlights if they are
switched on.
10.Turn on the heater blower and heated rear window in the v
ehicle with the flat battery.
This helps minimise voltage peaks which
are generated when the leads are discon-
nected.
11.When the engine is running, disconnect the lead
s in reverse order to the details
given above.
Make sure the battery clamps have sufficient
metal-to-metal contact with the battery termi-
nals.
If the engine fails to start, switch off the start-
er after about 10 seconds and try again after
about a minute. WARNING
● Plea se not
e the safety warnings referring to
working in the engine compartment
››› page 201, Working in the engine
compartment.
● The battery providing assistance must have
the same vo
ltage as the flat battery (12 V)
and approximately the same capacity (see imprint on battery). Failure to comply could
res
u
lt in an explosion.
● Never use jump leads when one of the bat-
teries i
s frozen. Danger of explosion! Even af-
ter the battery has thawed, battery acid could
leak and cause chemical burns. If a battery
freezes, it should be replaced.
● Keep sparks, flames and lighted cigarettes
away
from batteries, danger of explosion.
Failure to comply could result in an explo-
sion.
● Observe the instructions provided by the
manufactur
er of the jump leads.
● Do not connect the negative cable from the
other vehicl
e directly to the negative terminal
of the flat battery. The gas emitted from the
battery could be ignited by sparks. Danger of
explosion.
● Do not attach the negative cable from the
other vehicl
e to parts of the fuel system or to
the brake line.
● The non-insulated parts of the battery
clamps
must not be allowed to touch. The
jump lead attached to the positive battery
terminal must not touch metal parts of the ve-
hicle, this can cause a short circuit.
● Position the leads in such a way that they
cannot come int
o contact with any moving
parts in the engine compartment.
● Do not lean on the batteries. This could re-
sult in c
hemical burns. » 53
