If necessary, the engine can be started by connecting it to the battery of another vehicle.
If the engine fails to start because of a discharged battery, the battery can be connected to the battery of another vehicle to start the engine. Suitable jump leads are required.
Both batteries must be rated at 12 Volts. The capacity (Ah) of the booster battery should not be significantly lower than that of the discharged battery.
Jump leads
The jump leads must be heavy enough to carry the starter current. Refer to the details given by the manufacturer.
Only use jump leads with insulated battery clamps.
Positive cable – usually red.
Negative cable – usually black.
Preparations
Apply the handbrake and move the gear lever to neutral (manual gearbox) or move the selector lever to P (automatic gearbox).
Switch off all electrical equipment and the ignition on both vehicles.
- When it is discharged the battery can freeze at temperatures around 0°C. A frozen battery must first be thawed out before connecting the jump leads, as it could otherwise explode.
- Note the safety warnings referring to working in the engine compartment Link.
- If the jump leads are not connected correctly this can result in serious damage to the electrical system of the vehicle.
- The discharged battery must be properly connected to the vehicle's electrical system.
- Please note that the method described below for connecting the leads is intended for jump-starting your vehicle. If jump-starting another vehicle, you should not connect the negative lead (–) to the negative terminal of the discharged battery, but directly to the engine block or a solid metal part bolted to the engine block. If the battery of the other vehicle does not have a gas vent, there is a risk that a mixture of oxygen and hydrogen gas can accumulate and cause an explosion.
Note
- Switch off the car telephone if necessary. Details will be given in the manufacturer's instructions for the car telephone.
- The vehicles must not touch each other, otherwise electricity could flow as soon as the positive terminals are connected and the boosting battery could be discharged.