I am confused as to how a Turbo operates in my 1985 300TD. The car is quite slow up to about 2500 RPM when it suddenly starts pulling. Is this turbo unit pedal actuated or does it engage only after certain RPM? I drove an Audi recently where turbo engaged as you pressed the gas pedal but my car does that only after it passes 2500 RPM.
Igor Zeljic, Minneapolis.
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