Reducing Agent, Automatic Recirculation

• After switching off the ignition, the reducing agent flows back into the reducing agent tank via the metering line to the Reducing Agent Injector -N474-.
• Before working in this area, wait at least 10 minutes after switching off the ignition so that the recirculation process can be completed.
• Also wait 10 minutes after switching off the ignition before disconnecting the battery so that the recirculation process can be completed. Refer to BATTERY, DISCONNECTING AND CONNECTING .

Risk of damage due to reducing agent

If any reducing agent contacts the trim or body components, the reducing agent can crystallize after a period of time and damage the surface.

-- Make sure the reducing agent does not contact any trim or vehicle body components.

-- If any contact occurs on surfaces, remove the reducing agent immediately using water and a towel.