The Multi-Function Steering Knob is designed to allow the driver, using just one hand, to not only steer the vehicle, but also operate the turn signals, warning lights, headlights, windshield wipers and washer, and driver-side window. These secondary functions are activated by pushing buttons next to the knob that are within reach of the driver's fingers. The system, uses direct wiring (not battery-operated), installs on all automatic-transmission vehicles, including those with multiplex electronics.