Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 complete. Refer to BATTERY .
The reducing agent increase the risk of damage
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.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.