S5 Quattro Coupe V8-4.2L (CAUA) (2009)
a. Remove the side airbag crash sensor in the door to establish the position of the hole.
b. Using the edges of the opening for the side airbag crash sensor as a guide, draw perpendicular lines as shown in Figure 6.
A: 18mm
B: 27mm
Hole diameter: 6.5mm
c. Drill and deburr the hole.
d. Apply Anti-Corrosion Wash Primer ALN 002 003 10 with a brush and allow to thoroughly dry.
e. Treat the surface with Anti Corrosion Wax D 308 SP5 A1.