| When carrying out work on the fuel supply and injection system, the following cleanliness rules must be observed: |
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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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| Carefully cover or seal open components if repairs cannot be completed immediately. |
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| Only fit thoroughly clean components only remove replacement parts from packaging immediately prior to installation. Do not use parts that have been stored loose (e.g. in tool boxes 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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