| Even small amounts of dirt can cause malfunctions. For this reason, please observe the following rules when working on the fuel supply system and injection system: |
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| Carefully clean connection points and the surrounding area with engine cleaner or brake cleaner and dry thoroughly before opening. |
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| Seal off open lines and connections with clean plugs or sealing caps immediately. |
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| Place removed parts on a clean surface and cover. Use only lint-free cloths. |
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| If repairs cannot be carried out immediately, carefully cover or seal open components. |
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| Install only clean parts: only remove replacement parts from packaging immediately prior to installation. Do not use parts that have been stored loose (e.g. in toolboxes etc.). |
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| When the system is open: Do not use compressed air. Do not move the vehicle unless absolutely necessary. |
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| Protect the unplugged connectors against dirt and humidity. They should be dry before plugging them. |
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