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Jump-starting
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WARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
If the warning and indicator lamps do not light up on the instrument cluster when temperatures are
low, it is probably because the discharged battery has frozen. In this case, you may neither jump-
start the vehicle nor charge the battery. The service life of a battery that has been thawed may be
reduced. The starting characteristics may be impaired, especially at low temperatures. Have the
thawed battery checked at a qualified specialist workshop.
All vehicles:
!
Vehicles with a petrol engine: avoid repeated and lengthy starting attempts. Otherwise, the
non-combusted fuel may damage the catalytic converter.
Do not use a rapid charging device to start the vehicle. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from a second battery using jump leads.
Observe the following points:
The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
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start the vehicle using a donor battery or a jump-starting device.
Vehicles with a petrol engine: jump-start the vehicle only when the engine and exhaust system
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are cold.
All vehicles except vehicles with a lithium-ion battery: do not start the engine if the battery
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is frozen. Let the battery thaw first.
Jump-starting may be performed only using batteries with a nominal voltage of 12 V.
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Use only jump leads that have a sufficient cross-section and insulated terminal clamps.
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If the battery is fully discharged, leave the battery that is being used to jump-start connected for
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a few minutes before attempting to start. This charges the empty battery a little.
Make sure that the two vehicles do not touch.
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Make sure that:
The jump leads are not damaged.
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Non-insulated parts of the terminal clamps do not come into contact with other metal parts while
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the jump leads are connected to the battery.
The jump leads cannot come into contact with parts that can move when the engine is running,
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such as the V-belt pulley or the fan.
Secure the vehicle by applying the electric parking brake.
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Automatic transmission: shift the transmission to position P.
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Manual transmission: depress the clutch pedal fully and engage neutral.
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Make sure that the ignition is switched off . All indicator lamps on the instrument cluster must be
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off. When using the key, turn the key to position 0 in the ignition lock and remove it (
Switch off all electrical consumers, e.g. rear window heating, lighting etc.
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Open the bonnet.
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page 133).
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