Originally Posted by
seawolf
This has been true for at least since 2014 if not earlier and is in the
terms and conditions for Sixt Platinum. Basically you need to keep a minimum number of rental during the past rolling 12 months to keep the upgrade privilege. Refer to post #3 in the following
thread.
In US, the upgrade is 2-class. Outside the US, it is 1-class. The number of rentals you need to maintain for the upgrade privilege also depends on whether you are US based or not.
So what happens if you already have an X level car with the 2-class upgrade?