Ecotronic system (carburetor) function of: choke valve regulator, solenoid valves, potentiometer, corrector needle, throttle valve regulator, float, float needle valve, throttle valve and idle-mixture adjusting screw description ordernumber 1033 see also: exhaust turbocharger with charging-pressure control Mercedes-Benz A Class petrol engine with injection High-pressure pump (petrol direct injection) connecting rod model case