charge-air cooler This charge-air cooler is an air/water heat exchanger with a separate coolant circulation. The water and air channels have been cut away and painted accordingly. description ordernumber 1300 see also: Demand-driven oil pump with suction stage (V8) High-pressure pump (petrol direct injection) in-line type injection pump with electronic control Cylinder head of a petrol direct injection engine M 271 Evo Mercedes Benz