Directional decision – which car would be useful in the range ~500€ ?

Good evening all together, it’s time to start looking in February-March. I’m looking for a new car for ~500€. I’m currently in an apprenticeship, from October I’m most likely going to study full-time. Thanks to Bafög + side job, I won’t have less money available. I’ll be able to finance or entertain all the cars I’ll list below. One or the other car will make sure that I keep less money. My favourites: BMW E46 325/330Ci around year 2001 Seat Leon 1M 1.8t Audi A3 8L 1.8tMy driving profile: At the university it is 25km, makes 50km per day (but will not have to drive to the university every day). In addition, there are other private rides. So there will be a bit of something coming together. Of the 25km I will drive more than half over AB.My alternative: maybe a small car to have more money for other things in the bag. I have good quality possibilities? I would like to refrain from Opel if possible, even manufacturers like Hyundai, Suzuki and Fiat do not necessarily have to be. PS-wise it should already be around 100 hp, rather more. My heart tells me E46 330Ci, my mind Seat Leon 1M (at the moment), because with 180 hp properly motorized, fuel consumption in the frame and thanks to the 6th gear on the highway at fuel saving anyway in advantage again. A good, powerful small car would however be Which one should I really look at? Thank you