If you are traveling from Germany, take either the A3 or the A9.
At exit 173-Gratkorn Süd, head towards Gratkorn Süd/Graz/Andritz and then follow the B67 until you can take the B67a to Stiftingtalstraße in Graz.
If you are traveling by car, please note that there is a charge for using Austrian motorways and expressways. All motor vehicles with a maximum permissible weight of up to 3.5 tons—cars, motorcycles, and light motor homes—require a vignette. These can be purchased at gas stations (for example, before border crossings) or online.