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342 If and when
– Connect one end of the red jump lead to the positive
+
termi-
nal of the vehicle with the flat battery
A
⇒ Fig. 218.
– Connect the other end of the red jump lead to the positive ter-
minal
+
in the vehicle providing assistance
B
.
– Connect one end of the black jump lead to the negative terminal
–
of the vehicle providing assistance
B
⇒ Fig. 218.
– Connect the other end of the black jump lead
X
to a solid met-
al component bolted to the engine block or to the engine block
itself of the vehicle with the flat battery. However, connect it to
a point as far as possible from the battery
A
.
3. For vehicles with Start-Stop system:
– Connect one end of the red jump lead to the positive
+
termi-
nal of the vehicle with the flat battery
A
⇒ Fig. 219.
– Connect the other end of the red jump lead to the positive ter-
minal
+
in the vehicle providing assistance
B
.
– Connect one end of the black jump lead
X
to a suitable ground
terminal, a solid piece of metal in the engine block, or to the en-
gine block ⇒ Fig. 219.
– Connect the other end of the black jump lead
X
to a solid met-
al component bolted to the engine block or to the engine block
itself of the vehicle with the flat battery. However, connect it to
a point as far as possible from the battery
A
.
4. Position the leads in such a way that they cannot come into
contact with any moving parts in the engine compartment.
Starting
5. Start the engine of the vehicle with the boosting battery and let
it run at idling speed.
6. Start the engine of the vehicle with the flat battery and wait two
or three minutes until the engine is “running”.
Removing the jump leads
7. Before you remove the jump leads, switch off the dipped beam
headlights (if they are switched on).
8. When the engine is running, disconnect the leads in reverse or-
der to the details given above.
Connect the battery clamps so they have good metal-to-metal contact with
the battery terminals.
If the engine fails to start, switch off the starter after about 10 seconds and
try again after about half a minute.
WARNING
● Please note the safety warnings referring to working in the engine
compartment ⇒ page 280.
● The battery providing assistance must have the same voltage as the
flat battery (12V) and approximately the same capacity (see imprint on
battery). Failure to comply could result in an explosion.
● Never use jump leads when one of the batteries is frozen. Danger of
explosion! Even after the battery has thawed, battery acid could leak and
cause chemical burns. If a battery freezes, it should be replaced.
● Keep sparks, flames and lit cigarettes away from batteries, danger of
explosion. Failure to comply could result in an explosion.
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