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4. Remove the air cleaner assembly.
5. In vehicles with air conditioning, the additional assembly operations must be performed:
Suck Pentosin fluid out of the reservoir until the level is just below the joint.
5.1 Turn bayonet lock in the direction indicated by the arrow and pull off the reservoir. Immediately seal the lower reservoir with a suitable plug
(30 mm [diameter]).
Bayonet lock open
This is a source reference. Confirm exact model applicability in the original material.