I'm glad I did not get into an accident! It was really difficult to drive this car on thick snow.
Still, I am not criticising Sixt. I am very happy with the way I have been treated and I still plan to rent from them again. The price they offer is not the lowest, but very low. The service I have received has always been good. The representative in FRA Sixt said that I would not be charged for the towing. I have been very satisfied and I see no reason to change.