Pressure relief valve, location/task/function - GF83.55-P-2104T

MODELS 211.0/2/6 

Fig 1: Identifying Pressure Relief Valve And Refrigerant Compressor

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Pressure relief valve, position	The pressure relief valve (3) is located on the refrigerant compressor (A9).
Pressure relief valve, task	The pressure relief valve (3) serves to protect the refrigerant circuit from damage caused by excess pressure.
Pressure relief valve, function		GF83.55-P-2104-02P