Preparation Work For Calibrating Driver Assistance Systems

Perform the following steps using "quick access" if one or more driver assistance systems on the vehicle will be calibrated (without a previous axle alignment):

• Before driving the vehicle onto the alignment stand, make sure there is enough space between the vehicle and the ACC Adjustment Device.
• Audi Q7: the distance between the calibration device and the vehicle must be 120 cm ± 2.5 cm.
• Audi Q8: the distance between the calibration device and the vehicle must be 130 cm ± 2.5 cm.
• If there is not sufficient space, drive vehicle backward on alignment stand in order to be able to use the corresponding space.
• Audi Q7: vehicles with rear axle steering: switch off the ignition when the vehicle has come to a stop. This is the only way to ensure that the rear axle steering is in the straight-ahead position.
• Audi Q8: vehicles with rear axle steering: drive the vehicle "straight" onto the alignment rack. Switch off the ignition when the vehicle has come to a stop. Move the rear axle steering into zero position. Refer to REAR AXLE STEERING GEAR, MOVING INTO ZERO POSITION . This is the only way to ensure that the rear axle steering is in the straight-ahead position.
• Check the DTC memory and correct any errors before beginning the calibration/adjusting.
• Vehicle accurately aligned, suspension bounced and rocked several times
• Make sure that the sliding plates and turn tables are not touching the end stop when checking the wheel alignment.
• Connect the battery charger for the battery support mode. Refer to BATTERY, CHARGING .
• Position the wheels so that they are straight.
• Connect the Vehicle Diagnostic Tester to the vehicle and guide the diagnostic cable through the open window.
• The vehicle exterior lamps are off.
• All the vehicle doors are closed.
• Activate "vehicle lift mode" on equipment versions with air suspension. Refer to the appropriate Service Information or "Standard Vehicle Height, Initiating and Locking". Refer to STANDARD VEHICLE HEIGHT, INITIATING AND LOCKING .
• Using the screen, activate the calibration/adjustment on the wheel alignment computer.