A4 Mk2
| Diagram of coolant hose connections |
| 1 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 2 - | Coolant pump |
| q | Removing and installing → Chapter |
| 3 - | Thermostat |
| q | Removing and installing → Chapter |
| q | Checking → Chapter |
| 4 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
| 5 - | Bleeder screw |
| 6 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → |
| 7 - | Oil cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing → Chapter |
| 8 - | Continued coolant circulation pump -V51- |
| q | Only on vehicles equipped for a hot climate |
