Help for my father’s financing

Hello everyone I have a few questions for you to buy and finance a Jettas. So I’d like to start with my father to buy a Jetta Freestyle at a list price of 25,714.00 euros, so far so well. He would like to finance the car with the 0.9% financing of VW for 48 months. How does it work if he orders through an intermediary. How high would the financing sum be as high as the list price or like the discounted price – 4000 euros VW environmental premium. In general, it would be better for him to have a small deposit or no deposit at all and a small rate as possible. I have already tried to find a specific answer for the search function for many answers I would be very grateful and would like to thank you in advance.