Jump-starting
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Introduction
This chapter contains information on the following subjects:
Jump-starting
Jump-starting in vehicles with the START-STOP system
The battery of another vehicle can be used to jump-start your vehicle if the en-
gine will not start because the battery is flat. Jump-start cables are required for
this purpose.
Both batteries must have a rated voltage of 12 V. The capacity (Ah) of the battery
supplying the power must not be significantly less than the capacity of the dis-
charged battery in your vehicle.
Jump-start cables
Only use jump-start cables which have an adequately large cross-section and in-
sulated terminal clamps. Observe the manufacturer's instructions.
Positive cable - colour coding in the majority of cases is red.
Negative cable - colour coding in the majority of cases is black.
WARNING
A discharged vehicle battery may already freeze at temperatures just below
■
0 °C. In case of frozen battery carry out no jump-starting - risk of explosion!
Pay attention to the warning instructions relating to working in the engine
■
compartment
» page
169, Engine compartment.
The non-insulated parts of the terminal clamps must never make contact
■
with each other. In addition, the jump-start cable connected to the positive
terminal of the battery must not come into contact with electrically conduct-
ing parts of the vehicle - risk of short circuit!
Do not clamp the jump-start cable to the negative terminal of the dis-
■
charged battery. There is the risk of detonating gas seeping out the battery
being ignited by the strong spark which results from the engine being started.
Route the jump-start cables so that they cannot be caught by any rotating
■
parts in the engine compartment.
Do not bend over the battery - risk of caustic burns!
■
The vent screws of the battery cells must be tightened firmly.
■
WARNING (Continued)
Keep any sources of ignition (naked flame, smouldering cigarettes, etc.)
■
away from the battery - risk of an explosion!
Never jump-start vehicle batteries with an electrolyte level that is too low -
■
risk of explosion and caustic burns.
197
Note
198
There must not be any contact between the two vehicles otherwise current
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may flow as soon as the negative terminals are connected.
The discharged battery must be properly connected to the system of the vehi-
■
cle.
We recommend you buy jump-start cables from a car battery specialist.
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Jump-starting
ä
First read and observe the introductory information and safety warn-
ings
on page 197.
The jump-start cables must be attached in the following sequence:
Connecting positive terminals
›
Attach one end
» Fig. 161
1
.
A
›
Attach the other end
2
power
.
B
Connecting negative terminal and engine block
›
Attach one end
» Fig. 161
3
the power
.
B
Fig. 161
Jump-starting using the battery
from another vehicle: A - flat ve-
hicle battery, B - battery provid-
ing current
to the positive terminal of the discharged battery
to the positive terminal of the battery supplying the
to the negative terminal of the battery supplying
Do-it-yourself
Ð
£
197