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Emergencies
Jump starting
Jump leads
The jump lead must have a sufficient wire
cross section.
If the engine fails to start because of a dis-
charged battery, the battery can be connec-
ted to the battery of another vehicle to start
the engine.
Jump leads
Jump leads must comply with standard DIN
72553
(see cable manufacturer's instruc-
tion
s).
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 vehicles 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. 189 Diagram of connections for vehicles
without Start Stop system
Fig. 190 Diagram of connections for vehicles
with Start Stop system
Jump lead terminal connections
1. Switch off the ignition of both vehicles
››› .
2. Connect one end of the red
jump lead to
the po
s
itive
+
terminal of the vehicle
with the flat battery
A
››› Fig. 189
.
3.
C
onnect the other end of the red jump
lead to the positive terminal
+
in the ve-
hicle providing assistance
B
.
4. For vehicles without Start-Stop system:
connect one end of the black jump lead to
the negative terminal
–
of the vehicle
providing the current
B
››› Fig. 189
.
–
F
or
vehicles with Start-Stop system: con-
nect one end of the black jump lead
X
to a
suitable ground terminal, to a solid piece of
metal in the engine block, or to the engine
block itself ››› Fig. 190
.
5.
C
onnect the other end of the black jump
lead
X
to a solid metal component bolted
to the engine block 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 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.
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Technical specifications
AdviceOperationSafetyThe essentials
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