Drivers are given the choice between four drive modes, all of which are accessible from this console-mounted knob. Normal is the baseline. ECO somewhat dulls the throttle response -- artificially lightening your lead foot -- and adjusts the climate control systems for more efficient operation. Sport mode sharpens the throttle response and adjusts the electronic power steering for better feel and responsiveness. The rear-drive, IS 350 F-Sport features a more aggressive Sport+ setting, as well.