Reducing Agent, Automatic Regeneration

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi Q7, 2014 Audi Q7, 2013 Audi Q7, 2011 Audi Q7, and 2010 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

The reducing agent flows back into the active tank via the metering line to the Reducing Agent Injector -N474- when the ignition is turned off.
Before working in this area, wait 10 minutes after switching off the ignition so that the recirculation can complete.
Likewise, wait 10 minutes after switching off the ignition before disconnecting the battery so that the recirculation process can complete, refer to BATTERY, DISCONNECTING AND CONNECTING .

WARNING:

Danger due to reducing agent leaking out.

To prevent large amounts of reducing agent from leaking out when opening the metering line, wait for the recirculation process of the reducing agent to complete, refer to REDUCING AGENT, AUTOMATIC REGENERATION .