Q7 Quattro V6-3.6L (BHK) (2007)
Air pipes are color-coded:
1. Black, internal air line between solenoid valve block and compressor.
2. Green, air line toward right front air spring shock absorber.
3. Red, air line toward left rear air spring shock absorber.
4. Violet, air line to left front air spring damper.
5. Blue, air line toward pressure reservoirs.
6. Yellow, air line toward right rear air spring shock absorber.