The easement by (§ § 1018 et seq BGB) is a load of land (the serving land) for the benefit of the owner of another property (the ruling property) in such a way that it can use the serving plot in each relationship, or that this site specific actions may not apply or that the exercise of a law is excluded.
The easement created by agreement of the owners and registration in the Land Register the polluted land. The entry also in the land of the dominant land is possible, but not required. The owner is from interference use of his right as an owner protected.