Changes

take Take free Tesco bus from main Bus station (Dworzec PKS) to shopping center Bielany. get Get off at the last stop, go right along the Tesco (way back) to Czekoladowa street, then turn left (along the tesco), then cross the street, turn left, go under the bridge (highway), turn right and go along the highway across the field and one small entrance to the highway, you'll get to the petrol station (you have seen it from the bus). You can also take the free Auchan bus from the Dworzec PKS. Get off at the last stop and you will see a gas station from there. Just go directly towards it without crossing any streets (only these belonging to Auchan's car park) and you will be in the same place as in the Tesco bus option. Good luck!