if you come from further away , you first approach the motorway intersection "autobahnkreuz frankfurt/main"
onto the A3 heading east

(-if you´re not coming on the A3 from east already -)

from and on the A3 you change onto the A661 at the intersection "offenbacher kreuz" heading south towards darmstadt/egelsbach, until exit "neu isenburg/heusenstamm" – leave the motorway heading right towards "heusenstamm" (about 4 km).