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               |  Warning |  
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                     Work carried out when repairing the heater also involves the car's fuel system. The following points should therefore be observed when carrying out repair work:
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                   | • | Provide good ventilation! If approved equipment for extracting fuel fumes is available, it must be used. 
 
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                   | • | Use protective gloves! Long-term contact with fuels can cause skin irritation. 
 
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                   | • | Keep a Class BE fire extinguisher near at hand. Be mindful of the danger of sparks when disconnecting electrical wiring, short circuits, etc. 
 
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                   | • | No smoking. 
 
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