Terrible experience with Sixt Germany. Rented a car for just 2 days to drive to Austria — it had 2 pre-existing damages. One worsened during the trip, and I was charged the full repair cost. A week after returning the car, they sent another invoice for a new damage they "discovered" later. I requested a replacement car when the damage worsened — denied. No one at the rental office will talk to you, and my complaint was completely ignored. In total, they charged me €1600. Zero accountability, no customer support. Never renting from Sixt again. Rented in May 2025.