Reducing Agent, Automatic Regeneration

WARNING: This page is about a different car, the 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

The reducing agent flows back into the 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 .

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 SCR SYSTEM SAFETY PRECAUTIONS .