| Working on the reducing agent metering system - vehicles with SCR catalytic converter |
| When working on the reducing agent metering system, note the following warnings: |
WARNING | Reducing agent can cause skin irritation. |
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| Avoid contact with the skin and eyes. Wear protective gloves. |
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| If your skin has come into contact with reducing agent, rinse it off with soap and water. |
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| If reducing agent gets into your eyes, rinse them out with water for several minutes. |
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| Do not breathe in or swallow reducing agent. |
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| If you have swallowed reducing agent, rinse your mouth, drink lots of water and consult a paramedic or doctor immediately. |
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| Automatic sucking back of reducing agent |
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| After the ignition is switched off, the reducing agent is automatically drawn back into the active tank from the metering line going to the injector for reducing agent -N474-. |
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| Before performing work in this area, you must therefore wait until the reducing agent has been drawn back; this can take up to 10 minutes after the ignition has been switched off. |
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| It is also important to wait until the reducing agent has been drawn back (i.e. 10 minutes) before disconnecting the battery → Electrical system; Rep. gr.27. |
WARNING | Safety risk due to escaping reducing agent. |
| To prevent large amounts of reducing agent from escaping when the metering line is opened, wait until the reducing agent has been drawn back automatically → Anchor. |
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