| 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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| Plug open lines and connections with suitable protective caps immediately. |
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| Place parts that have been removed on a clean surface and cover them over. Use only lint-free cloths. |
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| Only install clean components; replacement parts should only be unpacked immediately prior to installation. Do not use parts that have been previously unpacked and stored away loose (e.g. in toolboxes, etc.). |
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| When the system is open: Do not work with compressed air. Do not move the vehicle unless absolutely necessary. |
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| Protect unplugged electrical connectors against dirt and moisture and make sure connections are dry when attaching. |
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