The volume of the tank on your Series 7 Saloon is 12L.
Between 1500 miles and 650 miles of AdBlue® mileage remaining, an alarm appears on the dashboard. A sound signal indicates safety. Below 650 miles of mileage, an AdBlue® warning is visible on the dashboard; An alarm sounds and a message warns you that restarting the engine will be impossible once the tank is empty. Once the tank is empty, a message is displayed and 3 alarm signals sound. Once turned off, the engine cannot be started again.
If your warning reaches 0 miles of mileage, it will be impossible to start your car after it has stopped. If your engine is still running with an empty tank, you can drive to a service station to fill up with AdBlue®.
This information can vary on some vehicles of the same model in relation to the options chosen by the manufacturer.