When carrying out welding work or any other work involving the formation of sparks, be sure to disconnect the battery (positive and negative cables) and carefully insulate both terminals (-) And (+). When working near the battery, it must be removed.
Attention! When the battery is removed, data from the electronic memory units, in particular, the radio code, are erased. Without a code, the radio can only be switched on by its manufacturer or a DAIMLER-BENZ workshop. Read the notes in Section Checking the charging system.
Note. When welding galvanized sheets, toxic zinc oxide is formed. Therefore, it is necessary to ensure good ventilation of the workplace.
Increase welding current by 10%, maximum 30%.
Use solid copper electrodes with high heat resistance (above +400°С).
Clean the electrodes frequently and grind them down to a contact surface diameter of 4 mm.
Increase the pressure on the electrode.
Increase welding time. The time is correct if the welding points are placed without spatter.
Air conditioner parts filled with refrigerant must not be welded or soldered with either soft solder or hard solder. This also applies to situations where there is a risk of heating of air conditioner components when welding or soldering other structural components.
Additionally
Do not open the cooling circuit of the air conditioner, as refrigerant can cause frostbite if it comes into contact with the skin.
When applying paintwork in a drying oven, it is not allowed to heat the car to a temperature above +80°C. Otherwise, the vehicle electronics may be damaged. In addition, the pressure in the air conditioner increases, which can lead to the destruction of the system.
The protective coating of the bottom of the car made of PVC is removed with a rotating steel brush or hot air with a temperature of up to +180°C using a spatula. When the PVC coating is heated to temperatures above 180°C, a chemical reaction occurs and hydrochloric acid is formed, which contributes to active corrosion, in addition, harmful vapors are formed.