Air unit mount, assembly overiew: Installing

• Instead of bonded joint, additional attachment points are required on installing holder -3-. See Fig 1.
• Remove dirt (wax etc.) on inside holder support area of body.
  Fig 1: Installing Air Unit Mount

  Courtesy of AUDI OF AMERICA, INC.
• Remove grommet in bottom part of unit holder.
• Insert unit holder in body and screw to wheel housing flange and longitudinal member.
• Make three 8.5 mm diameter holes in unit holder and body at marked locations (holder).
• Remove unit holder and deburr holes.
• Remove corrosion protection (PVC) in nut on outside of body.
• Insert unit holder and screw on as follows.

Tightening sequence:

• Holder to longitudinal member -A-. See Fig 2.
• Holder to wheel housing flange -B-
• -1- Hex bolt, 25 Nm. See Fig 2.
• -2- Hex flange nut
• -3- Speed nut
• Insert rubber grommet.
• Seal attaching points on outside of body (black Terolan).
• Insert unit with support sections -1- and -2- in unit holder and screw on. Pay attention to installation position of rubber bushings. See AIR UNIT MOUNT, ASSEMBLY OVERIEW , Item 2.
  Fig 2: Locating Air Unit Mount Bolts And Nuts

  Courtesy of AUDI OF AMERICA, INC.
• Listen to make sure connectors engage properly.
• Take care not to alter position of cutting rings on compressed air lines when inserting valves, as otherwise screw connection may leak.

Perform remaining installation operations in reverse order.