many inputs to activate DRS 1°/ Your car must have DRS (only F1, F2, F3, DTM) 2°/ Tracks must have DRS zones 3°/ You must assign a key in "assign controls" menu DRS is Rear Flap 4°/ Activate your car DRS when available (in practice and race, not qualify) if you are in the "zone" some tracks are set to 1second behind, some 2 sec. don't think you can activate DRS in all the cars because you see DRS light on in your HUD, only DRS cars ! it just mean your in the zone.