Before carrying out welding or other work during which sparks are generated, the battery must be completely disconnected (positive and negative wires) and both its poles (+) and (-) are carefully insulated with adhesive tape. When working near the battery, it must be removed.
Attention: Strictly follow the instructions given in the chapter "Removal and installation the battery".
Safety instructions
When performing bodywork, vibrations often occur, for example when striking with a hammer. Therefore, the ignition must always be switched off and the wires from the battery terminals disconnected, otherwise the airbag unit may be deployed. Read the safety instructions for handling the airbag unit, see page 117.
Cars with air conditioning:no welding or soldering of parts of a filled air conditioning system is permitted. This also applies to welding and soldering work on a vehicle when there is a risk of heating of parts of the air conditioning system.
Safety instructions
Do not open the refrigerant circuit of the air conditioning system, as contact with the refrigerant on the skin may cause frostbite. If the refrigerant accidentally comes into contact with the skin, rinse the area of contact with cold water for 15 minutes. The refrigerant evaporates at ambient temperature. The refrigerant is colorless, odorless, and heavier than air. Since the presence of the refrigerant is not felt, there is a risk of suffocation when working near the floor and in the installation pit.
Drying the paintwork:when repairing paintwork, it is permissible to heat the car in the drying chamber or in the area in front of the chamber to a temperature not exceeding +80°C. Otherwise, the electronic control units of the car will fail. In addition, very high pressure occurs in the air conditioning system circuit, under the effect of which the circuit may burst.
Removal of the polyvinyl chloride floor covering (PVC): the underbody is coated with a PVC coating to protect against corrosion. Remove the PVC coating at the repair site using a rotating steel brush or heat the area to a temperature of no more than +180°C using a heat gun and remove the coating with a spatula.
Caution: When the PVC coating ignites or overheats to a temperature above +180°C, it forms highly corrosive hydrochloric acid and also releases harmful fumes.
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