Sublets studio in Frankfurt,Germany

I sublet for one,two or three months maximum, 21 sqm studio apartment with parking included in Frankfurt Main, Niederrad area.
The location is in a good, quiet area, about 400 m from the subway, bus and tram stations, and supermarkets close by.
With the metro, there is one station to the central station, three stations to the city center and also three stations to the airport.
The cost is 600 euros per month.