Easy to reach by public transport:
S-Bahn from Frankfurt Hauptwache and Main Train Station (Hauptbahnhof)
S3, S4, S5 - beside this there are several busses also reaching this part of town.
By Car:
A66 - Exit Rödelheim - stay on the very right lane and turn right into Hausener Weg - later it becomes Thudichumstrasse.
At the T-junction turn right into Lorscher Strasse and turn the first street left into Alexanderstrasse.
Alexanderstrasse will lead you directly to Bahnhof Rödelheim. You can already look for a parking lot.
ON ON will be a bit left from the Train Station!