243If and when
Jump leads
Jump leads must comply with standard DIN 72553 (see cable manufactur-
er's instructions). The wire cross section must be at least 25 mm2 for petrol
engines and at least 35 mm2 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 net-
work.
How to jump start: description
Fig. 168 Diagram of con-
nections for vehicles
without Start-Stop sys-
tem
Fig. 169 Diagram of con-
nections for vehicles
with Start-Stop system
Jump lead terminal connections
1. Switch off the ignition of both vehicles ⇒ .
2. For vehicles without 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. 168.
–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. 168.
–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:
Safety First Operating Instructions Practical Tips Technical Specifications
