The essentials
Tow-starting
If the engine will not start, first try starting it
usin
g the battery of another vehicle
››› page 69. You should only attempt to tow-
start a vehicle if charging the battery does
not work. This is done by leveraging wheel
movement.
When tow-starting a vehicle with a petrol en-
gine, do not tow it more than a short dis-
tance, otherwise unburned fuel can enter the
catalytic converter.
●
Engage 2nd or 3rd gear before moving off.
●
Press the clutch and hold the pedal down.
●
Switch the ignition on.
●
Once both vehicles are moving, release the
clutc
h.
●
As soon as the engine has started, press
the clutch and move the gear lever to neutral.
How to jump start
Jump leads
The jump lead must have a sufficient wire
c
r
o
ss 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 must comply with standard DIN
72553 (see cable 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. 79 Diagram of connections for vehicles
w
ithout
Start Stop system
Fig. 80 Diagram of connections for vehicles
with St
art Stop system
Jump lead terminal connections
Sw
it
c
h off the ignition of both vehicles
›››
.
C
onnect
one end of
the red jump lead to
the positive
+
terminal of the vehicle
w
ith the fl
at
battery
A
›
›
› Fig. 79
.
Connect the other end of the red jump
lead to the positive terminal
+
in the
v
ehic
l
e providing assistance
B
.
F
or
vehicles without Start-Stop system:
connect one end of the black jump lead
to the negative terminal
–
of the vehi-
c
l
e pr
oviding the current
B
›
›
› Fig. 79
.
For vehicles with Start-Stop system: con-
nect one end of the black jump lead
X
to a suitable ground terminal, to a solid
piec
e of
met
al in the engine block, or to
the engine block itself ››› Fig. 80.
»
1.
2.
3.
4a.
4b.
69