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Jump-starting
Introduction
WARNING
■
The following instructions must be followed at all times when working on
the engine compartment » page 198.
■
When handling the vehicle battery, the following warnings must be ob-
served » page 203.
■
A discharged vehicle battery may already freeze at temperatures just be-
low 0 °C. If the battery is frozen, do not carry out a jump start with the bat-
tery of another vehicle – risk of explosion and injury!
■
Never jump-start vehicle batteries with an electrolyte level that is too low
– risk of explosion and caustic burns.
Jump-starting using the battery from another vehicle
Fig. 251 Jump-starting: - discharged battery, - power-supplying
battery/ground point of the engine for the START-STOP system
Fig. 252 Earth point and positive terminal on vehicles with the vehicle
battery in the luggage compartment
Read and observe on page 216 first.
If, because of a discharged battery, it is not possible to start the engine, the
battery of another vehicle can be used to start the engine. To do this, jump-
start cables are required which have a sufficiently large cross-section and insu-
lated terminal clamps.
The rated voltage of the two batteries must be 12 V. The capacity (Ah) of the
power-supplying battery must not be significantly lower than the capacity of
the discharged battery.
The jump-start cables must be attached in the following sequence.
›
Attach clamp
1
to the positive terminal of the discharged battery.
›
Attach clamp
2
to the positive terminal of the power-supplying battery.
›
Attach clamp
3
to the negative terminal of the power-supplying battery.
›
For vehicles with the START-STOP system, attach clamp
4
to the ground
point of the engine
A
» Fig. 251.
›
For vehicles without the START-STOPsystem, attach clamp
4
to a solid
metal part firmly attached to the engine block or directly to the engine block.
Installation location of the positive terminal and the earth point in vehicles
with the vehicle battery in the luggage compartment
The positive terminal
B
is located under a cover in the engine compartment
» Fig. 252.
›
Unlock the lock buttons of the cover in the direction of arrow
1
and remove
the cover in the direction of arrow
2
.
›
Clamp the positive terminal of the jumper cable to the position
B
» Fig. 252.
216
Do-it-yourself
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