Make sure the wheels and tires, tie rod ends, suspension joints and wheel bearings are free from damage, wear and free play.
Make sure there are no heavy objects in the vehicle.
The ride height must be measured with the vehicle weight supported by the suspension.
With the engine running and all vehicle doors closed, make sure the air suspension is functioning and the vehicle height can be raised and lowered using the air suspension switch.
Drive the vehicle on to a flat, level surface.
Make sure the steering is in the straight ahead position.
This procedure must be carried out after replacement of the air suspension control module or height sensor link arm, removal or replacement of the front or rear upper arms or the height sensor. The ride height does not need calibration after removal or replacement of the front or rear air springs or shock absorbers.
Make sure the vehicle is not moved once it has been positioned to take measurements.
Make sure the ignition switch is turned off, the park brake is on and the selector lever is in park.
IDS already loaded with the latest issue of software.
Do not install the special tool over a locking wheel nut.
Make sure the special tool is square to the wheel face with the measuring rod in a vertical position.
Take the measurement from the top edge of the slider on the special tool.
Make sure the fender splash shields are correctly fitted.
IDS will now cause the vehicle height to change.