A3 Mk2
| Diagram of coolant hose connections |
| Vehicles with manual gearbox |
| 1 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → Anchor |
| 2 - | Change-over flap for exhaust gas recirculation cooler |
| Engine codes BMN, BUY: |
| q | No separate coolant connection |
| q | Integrated in exhaust gas recirculation cooler -item 7- |
| 3 - | Exhaust gas recirculation cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing: vehicles with engine codes AZV, BKD → Chapter, vehicles with engine codes BMN, BUY → Chapter |
| 4 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
| 5 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 6 - | Coolant hose |
| q | At top of radiator |
| 7 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 8 - | Coolant hose |
| q | At bottom of radiator |
| 9 - | Oil cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing → Chapter „Removing and installing oil filter bracket with oil cooler“ |
| 10 - | Coolant pump/thermostat |
| q | Removing and installing coolant pump → Chapter |
| q | Removing and installing thermostat → Chapter |
| q | Checking thermostat → Chapter |
| 11 - | Auxiliary heater |
| q | Optional extra |
| Vehicles with direct shift gearbox |
| 1 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → Anchor |
| 2 - | Change-over flap for exhaust gas recirculation cooler |
| Engine codes BMN, BUY: |
| q | No separate coolant connection |
| q | Integrated in exhaust gas recirculation cooler -item 7- |
| 3 - | Exhaust gas recirculation cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing: vehicles with engine codes AZV, BKD → Chapter, vehicles with engine codes BMN, BUY → Chapter |
| 4 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
| 5 - | ATF cooler |
| q | If renewed, refill system with fresh coolant |
| 6 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 7 - | Auxiliary radiator |
| q | Depending on equipment |
| 8 - | Coolant hose |
| q | At top of radiator |
| 9 - | Oil cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing → Chapter „Removing and installing oil filter bracket with oil cooler“ |
| 10 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 11 - | Coolant hose |
| q | At bottom of radiator |
| 12 - | Coolant pump/thermostat |
| q | Removing and installing coolant pump → Chapter |
| q | Removing and installing thermostat → Chapter |
| q | Checking thermostat → Chapter |
| 13 - | Auxiliary heater |
| q | Optional extra |
