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| Pull fuel return line (blue line or blue marking) -2- off fuel delivery unit. |
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| Connect pressure gauge pipe -VAS 6551/5-2- to the fuel return line -1-. |
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| Put open end of line -VAS 6551/5-2- into
a suitable container. |
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| Connect vehicle diagnosis tester and
then carry out guided function „Fuel pump activation“. |
Note The fuel pump is now activated. |
–
| Repeat procedure, if necessary, until fuel tank is completely
empty. |
–
| Fill fuel tank with 5 litres of diesel fuel. |
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| Completely empty fuel tank again as described above. |
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