I did sent a request to SIXT yesterday, then they replied that the vehicle is unavailable for that required period. Looking for a Series 6 Cabrio or M4 Convertible.
Two years ago, I missed an European Delivery Trip when I purchased my 2014 M6 Gran Coupe, so it's time to do an "alike" trip this September. I'll be in Munich for BMW 100 Years Event, it must be an amazing and once of a lifetime experience to enjoy
Thanks everyone for the advice, I do truly appreciate! I will keep you guys updated!