If and when
278
WARNING
•Please note the safety warnings referring to working in the engine 
compartment  ⇒page 227, “Working in the engine compartment”.•The battery providing assistance must have the same voltage as the flat 
battery (12V) and approximately the same capacity (see imprint on 
battery). Failure to comply could result in an explosion.•Never use jump leads when one of the batteries is frozen. Danger of 
explosion! Even after the battery has thawed, battery acid could leak and 
cause chemical burns. If a battery freezes, it should be replaced.•Keep sparks, flames and lighted cigarettes away from batteries, danger 
of explosion. Failure to comply could result in an explosion.•Observe the instructions provided by the manufacturer of the jump 
leads.•Do not connect the negative cable from the other vehicle directly to the 
negative terminal of the flat battery. The gas emitted from the battery could 
be ignited by sparks. Danger of explosion.•Do not attach the negative cable from the other vehicle to parts of the 
fuel system or to the brake line.•The non-insulated parts of the battery clamps must not be allowed to 
touch. The jump lead attached to the positive battery terminal must not 
touch metal parts of the vehicle, this can cause a short circuit.•Position the leads in such a way that they cannot come into contact 
with any moving parts in the engine compartment.•Do not bend over the batteries. This could result in chemical burns.Note
The vehicles must not touch each other, otherwise electricity could flow as 
soon as the positive terminals are connected.
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