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| Disconnect vacuum hose from vacuum unit and connect the hand vacuum pump -VAS 6213- in its place. |
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| Operate hand vacuum pump to create a vacuum. |
l
| The linkage of the changeover for the exhaust gas recirculation cooler must move -arrows-. |
If linkage does not move or only moves in jerks: |
t
| The vacuum unit is defective. |
t
| The change-over flap for exhaust gas recirculation is sticking. |
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