Employee car rental or purchase

Hi everyone, we are currently faced with a decision to rent or buy a car and I would like to get a few opinions from the sub. My wife is currently using an employee rental model through her employer (car manufacturer). Vehicle: petrol engine / compact class Mileage: approx. 15,000 km / year Fixed costs: €420 / month (insurance, taxes, service included) Fuel costs: approx. €160 / month Total costs: approx. €580 / month Note: Rent an electric car through the AG