Turning Tight Tolerances ON

The engine must be running
The air suspension must be controlling normally, e.g. not in another special operation mode or vehicle not jacked
Open the driver door
Tap the brake pedal 3 times

NOTE: The brake pedal can be pressed firmly, but the process is less likely to be successful because, in the time available for the 3 presses, it is difficult to ensure that the pedal has returned to the fully off position between presses.

Close the driver door within 10 seconds of the first brake pedal tap.

If this has been successful, the IC will emit two soft chimes about 1 second after the driver door is closed. Thereafter, the IC will emit two soft chimes each time the driver door is closed to confirm that this tight tolerance mode is still active.