Always unhook and remove the negative
Battery Cable, then wait two minutes before starting any job on the
Steering Wheel, steering column or instrument panel so that the air bag system discharges. Disable the air bag system only by using this method, as an accidental air bag can cause serious harm. Unique controls mean that ATC A/C-heater parts from other vehicle lines cannot be used, so change only the control designed for the specific car. First, take the negative battery connection out and isolate it from the rest. After that, take out the center bezel from the instrument panel and set it aside on a worktable. Unscrew the screws connecting the electronic vehicle information center and A/C-heater control to the center bezel and remove both controls.