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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)SUSPENSIONWHEEL ALIGNMENTSPECIFICATIONS & PROCEDURESWHEEL ALIGNMENT PROCEDURESTOE-IN CURVESETTING SUSPENSION TO STARTING POSITION (1BB)
1998 Audi A4 Avant Quattro, Automatic

Setting Suspension To Starting Position (1BB)

1998 Audi A4 Avant Quattro, AutomaticSECTION Setting Suspension To Starting Position (1BB)
  1. Depending on the type of wheel alignment equipment used, it may be necessary to raise the front of the vehicle in order to position the VAG1925 spacer. See Figure . After lowering the vehicle again the suspension must be bounced.
  2. Insert Spacer (VAG1925) together with Adapters (VAG1925/4). Screw both threaded spindles out until they just rest against front subframe bolts (arrow). See Figure . Do not raise the vehicle using this procedure. The vehicle is now in the defined starting position for vehicles with heavy duty suspension (1BB).
  3. The defined starting position is the position the springs must be in when using the wheel alignment program to check the actual toe-in setting for each wheel. See WHEEL ALIGNMENT SPECIFICATIONS  . Setting should match the specification +10' +/- 30' (rough pre-adjustment). If necessary, the toe-in must be corrected by adjusting the tie rod length. If the settings need to be corrected, this will be indicated by the wheel alignment program.
    4. NOTE: Make sure that the wheels do not loose contact with the turntables during the lifting operation. If wheels do loose contact, do not move the turntables. Otherwise, incorrect measurements will result.
  4. Raise vehicle at front jacking points. Lift cylinders out of threaded spindles and secure in position using locking pins. See Figure . Make sure locking pins (arrows) are correctly positioned. Remove Adapter (VAG1925/6). Lower vehicle down onto spacer gauge.
  5. The wheel alignment program determines the current right and left toe constant. The program checks whether the current toe constant (actual value) lies within the tolerance (control value). See WHEEL ALIGNMENT SPECIFICATIONS  . If toe constant actual value lies outside control value tolerance, adjust toe value constant within adjusting value tolerance. See ADJUSTING TOE CONSTANT "S" (ALL SUSPENSION TYPES)  .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.