| When working on the fuel supply and injection system, pay careful attention to the following „5 rules“ for cleanliness: |
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| Thoroughly clean all joints and connections and the surrounding areas before dismantling. |
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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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| Only fit clean components: Only remove new parts from their packaging immediately before fitting. Do not use parts that have been stored loose (e.g. in toolboxes etc.). |
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| If the system is open: do not work with compressed air if this can be avoided. Do not move vehicle unless absolutely necessary. |
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