The essentials
››› in Notes on page 79
››› page 79 Tow-starting
If the engine will not start, first try starting it
us
in
g the battery of another vehicle
››› page 52. 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.
However, if your vehicle has to be tow-star-
ted:
● Engage 2 nd
or 3 rd
g e
ar.
● Keep the clutch pressed down.
● Switch the ignition on.
● Once both vehicles are moving, release the
clutc
h.
● As soon as the engine starts, press the
clutc
h and move the gear lever into neutral.
This helps to prevent driving into the towing
vehicle.
››› in Notes on page 79
›››
page 79 How to jump start
Jump l e
a
ds The jump lead must have a sufficient wire
cr
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
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 v ehic
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 t
o the on-board network. How to jump start: description
Fig. 69
Diagram of connections for vehicles
w ithout
Start-Stop system. Fig. 70
Diagram of connections for vehicles
w ith
St
art-Stop system. Jump lead terminal connections
1. Switch off the ignition of both vehicles
››
›
.
52
