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Home >> Mercedes Benz >> 2012 >> S400 >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Emergency Equipment, Disability Equipment, Sanitary Equipment, Galley - Safety Precautions) >> Safety Information >> Risk of explosion caused by welding and soldering work on refrigerant circuit of refrigerator box. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant. - AS86.61-Z-0001-02H

Risk of explosion caused by welding and soldering work on refrigerant circuit of refrigerator box. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant. - AS86.61-Z-0001-02H

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Never perform welding work on or near refrigerator box or compressor. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated areas. 

MODEL 221.1 with CODE Z07 (Top protection) with refrigerator box 

MODEL 240 with CODE 308 (Cooling box in armrest between rear seats) 

Potential risks 

Risk of explosion 

When the refrigerant circuit of the refrigerator box (charged or empty) is closed, overpressure is generated due to heat; this can ultimately cause the system to burst. For this reason, all welding and soldering  work on or near the refrigerator box and the compressor is strictly prohibited.

High pressure levels can combine with refrigerant vapors to produce a mixture that is potentially explosive when exposed to atmospheric air.

Risk of poisoning 

The refrigerant can decompose when overheated. The resulting substances are toxic and should never be inhaled.

Risk of injury 

Refrigerant vapors are heavier than the air and therefore there is a risk of suffocation in work pits below vehicles when refrigerant escapes.

Contact with liquid refrigerant may cause frostbite-like damage to the skin (due to undercooling).

Safety instructions/precautions 

First-aid measures 

In the event of contact with eyes

In the event of skin contact

After inhaling a high concentration of refrigerant vapors

In the event of ingestion