A3 Mk2
| Diagram of coolant hose connections |
| 1 - | Coolant expansion tank |
| q | Checking pressure relief valve in filler cap → Anchor |
| 2 - | Coolant circulation pump -V50- |
| 3 - | Coolant pump |
| 4 - | Intake manifold |
| q | With charge air cooler |
| q | If renewed, refill system with fresh coolant |
| 5 - | Heat exchanger for heater |
| q | Removing and installing → Rep. gr.87 |
| q | If renewed, refill system with fresh coolant |
| 6 - | Housing |
| q | For thermostat |
| 7 - | Non-return valve |
| q | Arrow points in direction of through-flow |
| 8 - | Restrictor |
| 9 - | Radiator |
| q | Combined with low-temperature radiator for charge air system |
| q | If renewed, refill system with fresh coolant |
| 10 - | Turbocharger |
| 11 - | Low-temperature radiator |
| q | For charge air system |
| q | Combined with radiator |
| q | If renewed, refill system with fresh coolant |
| 12 - | Cylinder head and cylinder block |
| q | If renewed, refill system with fresh coolant |
| 13 - | Engine oil cooler |
| q | If renewed, refill system with fresh coolant |
| 14 - | Non-return valve |
| q | Arrow points in direction of through-flow |
| 15 - | Auxiliary heater |
| q | Optional equipment |
