A4 Mk3
| Vacuum system |
| 1 - | Exhaust gas recirculation cooler change-over valve -N345- |
| 2 - | Coolant valve for cylinder head -N489- |
| 3 - | Vacuum unit |
| q | For exhaust gas recirculation cooler |
| 4 - | Non-return valve |
| 5 - | To brake servo |
| 6 - | Shut-off valve |
| q | For coolant |
| 7 - | Vacuum connection |
| q | On sump (top section) |
| q | To vacuum pump |