Boost Air Compressor Rotors
A - Normal absorption
B - Supercharging
Compressor boost air control and management valves
[Article borrowed from the web portal mercedesman.ru]
Supercharger air flow control valve. "A" - normal air intake, "B" - boost
At full load, the damper is in position B - air is supplied to the compressor. In position A, air bypasses the compressor. Air is supplied to the intercooler in both cases. The damper is controlled by the electronic control unit