Test Requirements, AUDI Q8

Special tools and workshop equipment required 

• Steering Wheel Scales: VAS6458A 

• Vehicle must be cool.
• Check suspension, steering and steering linkage for excessive play and damage. Repair if necessary.
• Tread depth difference may be no more than 2 mm on an axle.
• Prescribed tire pressure
• Drive the vehicle onto the alignment rack without tension. Move the vehicle back and forth if necessary to relieve any tension on the axle components.
• 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, AUDI Q8 . This is the only way to ensure that the rear axle steering is in the straight-ahead position.
• Vehicles with rear axle steering: check the steering gear rear axle orientation. Refer to REAR AXLE STEERING GEAR ORIENTATION, CHECKING .
• Vehicle accurately aligned, suspension bounced and rocked several times
• The steering wheel must be "evened out" into the center position before beginning the measuring and adjusting. Use : VAS6458A  for this.
• Vehicles with coil springs in curb weight position, "curb weight position means: the vehicle weight (fuel tank full as well as the washer fluid reservoir for the windshield/headlamp washer system, spare tire, vehicle tool kit and vehicle jack) without the driver." Refer to VEHICLES WITH COIL SPRINGS, CHECKING THE CURB WEIGHT POSITION FOR AXLE ALIGNMENT .
• Vehicles with air suspension  at standard vehicle height: "standard vehicle height means: the vehicle level without the driver". Refer to STANDARD VEHICLE HEIGHT FOR AXLE ALIGNMENT ON VEHICLES WITH AIR SUSPENSION, CHECKING .
• Make sure that the sliding plates and turn tables are not touching the end stop when checking the wheel alignment.
• The measurement sensor must be properly adjusted and attached to the vehicle; observe device manufacturer's operating instructions.
• Perform wheel run-out compensation: permissible axial run-out of the wheel rims can exceed the specified toe setting tolerance. If compensation for wheel run-out is not performed, it will not be possible to obtain a correct toe-in adjustment.
• Over time, wheel alignment platforms and computer equipment can lose their original leveling setting and adjustments. They should be calibrated at least once a year as part of the maintenance.
• Handle highly sensitive units with care.
• If necessary, contact the manufacturer for instruction on the proper use of the equipment.