Adjusting at impact absorbers

Remove middle undercar aerodynamic cover. See UNDERCAR AERODYNAMIC COVERS, REMOVING AND INSTALLING .
Remove bolts -2-.

Fig 1: Removing Rear Bumper Bolts (Up To M.Y. 1999)

Courtesy of AUDI OF AMERICA, INC.

Fig 2: Adjusting Rear Bumper Threaded Sleeve Up Or Down In Impact Absorber (Up To M.Y. 1999)

Courtesy of AUDI OF AMERICA, INC.