The rental company strongly pushed other premium models and insurance. I mentioned I already had insurance and would not purchase more. After I declined, they switched the Mercedes to an Audi and claimed that without upgrading there would be no navigation (although the Audi did have navigation). I had seen the Mercedes model when I arrived, but the company insisted it was unavailable. The service experience was not good. Fortunately, the Audi A5 was in good condition, so I didn't pursue the matter further.