I recently rented from Sixt on my vacation and prepaid for a BMW X1 (a premium rental). When I arrived to pickup my rental, I was provided with a Jeep Renegade. While I protested at the obvious downgrade, the customer service agent at the rental facility stated that the Jeep was an equivalent car. Upon return from my vacation, I complained to Sixt customer service. At that time, they recognized that I was downgraded and offered me a 50$ discount that I could use in the next year. What a joke! I declined the offer as I would never rent from them again. Their moto should be: Pay for premium and we give you economy!