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The essentials
Jump leads must comply with standard DIN
72553 (see c
ab
l
e manufacturer's instruc-
tions). The wire cross section must be at least
25 mm
2
for petrol engines and at least
35 mm
2
for diesel engines.
Note
●
The vehic
les must not touch each other,
otherwise electricity could flow as soon as
the positive terminals are connected.
●
The discharged battery must be properly
connected to the on-board network.
How to jump start: description
Fig. 78 Diagram of connections for vehicles
w
ithout
Start Stop system
Fig. 79 Diagram of connections for vehicles
with St
art Stop system
Jump lead terminal connections
1. Switch off the ignition of both vehicles
›
›
›
.
2. Connect one end of the r
e
d
jump lead to
the positive
+
terminal of the vehicle
w
ith the fl
at
battery
A
›
›
› Fig. 78
.
3. Connect the other end of the red jump
lead to the positive terminal
+
in the ve-
hic
l
e pr
oviding assistance
B
.
4. For vehicles without Start-Stop system:
c
onnect
one end of
the black jump lead to
the negative terminal
–
of the vehicle
pr
o
v
iding the current
B
›
›
› Fig. 78
.
–
For vehicles with Start-Stop system: con-
nect one end of the black jump lead
X
to a
s
uit
ab
le ground terminal, to a solid piece of
metal in the engine block, or to the engine
block itself ››› Fig. 79.
5. Connect the other end of the black jump
lead
X
to a solid metal component bolted
t
o the en
gine b
lock 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
c
annot
c
ome into contact with any moving
parts in the engine compartment.
Starting
7. Start the engine of the vehicle with the
boosting battery 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 headlights if they are
switched on.
10.Turn on the heater blower and heated rear
window in the vehicle 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 leads in reverse order to the details
given above.
»
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