Audi 100 C3 III (1982-1991)
Front bumper
-remove the grille
-remove trim strip (if any)
-disconnect fog lights (if equipped)
-unscrew bolts of fastening of the amplifier of a bumper
-pull the bumper away from the side rails
Rear bumper
-under the trunk lining, Unscrew two bolts of fastening of the amplifier of a bumper
-pulls the bumper with the side rails
-if you have a tow bar, it is usually removed along with the bumper