The volume of the tank on your A6 Saloon is 17L.
When your reserve of AdBlue® reaches a remaining mileage of 1500 miles of mileage, a warning is displayed on the dashboard. An audio signal sounds to warn you. Below 650 miles, an AdBlue® warning appears on the dashboard, an alarm signal sounds and a message warns you that starting the engine will be impossible once the tank is empty. At the time the tank is empty, a message is displayed and 3 alarm signals echo. To switch off the AdBlue® warning light when the tank is empty, pour at least 5,7 L of AdBlue® in the tank.
If your warning shows a remaining mileage of 0 miles, restarting your car is impossible once the engine has been turned off. If your engine is still running and your tank is empty, it is still possible to drive to a petrol station. If the car does not start after the AdBlue® top up, wait 2 minutes for the system to detect it. If the AdBlue® tank is empty, turn the ignition on for about 15 seconds and then start the engine.
This information can vary on some vehicles of the same model in relation to the options chosen by the manufacturer.