Steering wheel buttons 4.3-28 • Tighten the fixing screws (1) of the steering wheel back buttons with a Phillips screwdriver (one for left/right side of steering wheel). • Refit the driver’s frontal airbag. (Refer to "Removal and Refitting of Front Passenger's Airbag" in "Supplemental Restraint System"). • Connect the battery negative cable ,turn the ignition switch or the start-stop button on to check that the steering wheel buttons can work properly.