Working students and company vehicle

Hello everybody, In the last few days the idea has come up in the company that I could get a little flicker as a working student. Now the question is how does that count?Current situation: I am currently for 16 hours in the company and have on average 800€ per month as a payoff. In between it can become more or more times less. Employment contract 3 days are provided in the company. Privately I drive a Mazda 3 of the monthly at fuel costs approx. 200€ t incl. private trips of course. The possible plan I should get an annual car e.g. where the list price is about 10,000 – 15,000€. The easy way is so about 32km. Now the question is how does this affect me? Is that worth it at all for me. I know here there is a 1% rule and I have to pay tax etc. Does anyone have experience with it here? Unfortunately I can estimate this zero and also my employer was not confronted with the situation so far. k for your answers Greetings