Malaak Audi A7

Hello and peace be upon you, as well as God's mercy and blessings. Dear brothers, I would like to inquire about the Audi A7 car. I need your help. I am a university student looking for an Audi A7 model from 2015 to 2017, and I want someone to answer these questions: 1- Is it reliable? 2- What problems have you faced with this car? 3- Are the prices of consumable parts expensive? 4- How often does it need an oil change, and how far can it go? Thank you very much.