Google will help you. I think there will be a lot of interesting options. I, for example, used this one https://limousine-service.com/limousine-service-munich-muc-airport . Good machines, I liked it all. I think everyone in Germany has insurance everywhere, so I don't think you have to worry about it. You just need to clarify what applies to insurance claims. In fact, the law of meanness has never been repealed. You want everything to be at its best and everything turns out as usual with a bunch of problems. I think you should not just look and look on the Internet and call your chosen company and ask everything point by point. So as not to miss anything.

Totally agree with Grem456, well explained. I think that in Germany there should be no problem with this, you do not want to visit some tribe in central Africa. So you don't have to worry. But it's better to plan in advance.