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Home >> Mercedes Benz >> 2007 >> S550 Base >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Air Intake, Turbo Charging -- S-Class (221) >> Basic Knowledge >> Charge air cooling circulation pump, location/task/function - GF09.41-P-3102M

Charge air cooling circulation pump, location/task/function - GF09.41-P-3102M

ENGINE 275.950 in MODEL 215, 220 

ENGINE 275.951 in MODEL 230 up to Model Year 08 /AEJ 07 

ENGINE 275.953 in MODEL 216, 221 up to Model Year 08 /AEJ 07 

ENGINE 275.954 in MODEL 230 up to Model Year 08 /AEJ 07 

ENGINE 275.980 in MODEL 215, 220 

ENGINE 275.981 in MODEL 230 up to Model Year 08 /AEJ 07 

ENGINE 275.982 in MODEL 216, 221 up to Model Year 08 /AEJ 07 

ENGINE 285.950 in MODEL 240 

ENGINE 285.980 in MODEL 240 

Fig 1: Identifying Charge Air Cooler Circulation Pump, Coolant Hose Connections & Electrical Connection
G07630307Courtesy of MERCEDES-BENZ USA
  Charge air cooling circulation pump, arrangement Model 215, 220 GF09.41-P-3102-01K
Model 216, 221 GF09.41-P-3102-01MS 
Model 230 GF09.41-P-3102-01RA
Model 240 GF09.41-P-3102-01M
  Charge air cooling circulation pump task Keep the charge air temperature below 70°C by means of coolant circulation.  
  Charge air cooling circulation pump function The circulation pump is actuated via a relay by the engine control unit.
Switch on:
Charge air temperature above approx.
47°C
Switch off:
Charge air temperature below approx. 35°C.