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Refrigerant compressor, location/task/design/function - GF83.55-P-2100T

ENGINE 112, 113, 156, 271, 272, 273, 628, 629, 642, 646, 647, 648 in MODEL 211.0 

ENGINE 112, 113, 156, 271, 272, 273, 642, 646, 647, 648 in MODEL 211.2 

ENGINE 642, 646, 647 in MODEL 211.6 

Fig 1: Locating Refrigerant Compressor
G07265831Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Refrigerant compressor, position The refrigerant compressor (A9) is flanged on to the left front of the engine.  
Refrigerant compressor, task The refrigerant compressor (A9) is responsible for induction and compression of the refrigerant.  
Refrigerant compressor, design   GF83.55-P-2100-03P 
Refrigerant compressor, function   GF83.55-P-2100-02P