A3 Mk2
| Diagram of coolant hose connections |
| 1 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 2 - | Engine oil cooler |
| q | Removing and installing → Chapter „Removing and installing oil filter bracket with engine oil cooler“ |
| q | If renewed, refill system with fresh coolant |
| 3 - | Thermostat |
| q | Removing and installing → Chapter |
| q | Checking → Chapter |
| 4 - | Coolant pump |
| q | Removing and installing → Chapter |
| 5 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 6 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → Anchor |
| 7 - | Exhaust gas recirculation cooler |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 8 - | Circulation pump -V55- |
| q | For auxiliary heater |
| 9 - | Auxiliary heater |
| 10 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
