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Jump-starting
Introduction
WARNING
The following instructions must be followed at all times when working on
■
the engine compartment
» page
When handling the vehicle battery, the following warnings must be ob-
■
served
» page
208.
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. 250 Jump-starting: - discharged battery, - power-supplying
battery/ground point of the engine for the START-STOP system
222
Do-it-yourself
202.
Fig. 251 Positive terminal on vehicles with the vehicle battery in the lug-
gage compartment
Read and observe
on page 222 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
to the positive terminal of the discharged battery.
1
›
Attach clamp
to the positive terminal of the power-supplying battery.
2
›
Attach clamp
to the negative terminal of the power-supplying battery.
3
›
For vehicles with the START-STOP system, attach clamp
point of the engine
» Fig.
250.
A
›
For vehicles without the START-STOPsystem, attach clamp
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
is located under a cover in the engine compartment
B
» Fig.
251.
›
Press together the lock buttons of the cover simultaneously in the direction
of arrow
and remove the cover in the direction of arrow
1
›
Clamp the positive terminal of the jumper cable to the position
to the ground
4
to a solid
4
.
2
» Fig.
251.
B
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