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| Remove the ventilation pipe -1-. To do so, press the release tabs. |
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| Then connect the manual vacuum pump -VAS 6213- using the adaptor set -V.A.G 1318/17- to the piping which goes to the activated carbon filter. |
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| Operate the hand vacuum pump -VAS 6213- several times. Vacuum must not build up. |
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| Check if the ventilation hose of the activated carbon filter is dirty and clean it, if necessary. |
If a vacuum does not build up: |
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| Temporarily block breather hose and operate vacuum pump several times. A vacuum must build up. |
If a vacuum does not build up: |
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| Renew active carbon filter. |
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