Questions about rental luxury class (XDAR)

Hello, General, Would like to rent me the XDAR group for a weekend. I am over 30 and for a long time the driver’s license also has 2 credit cards, this should not be the case. (Fair, wedding and birthday on the weekend is the reason) Maximum should come together 200-300 km there is also a garage available for the evening. At Sixt I get XDAR from Friday 10 o’clock to Monday 10 o’clock Prepaid pay extended comprehensive protection ink.Theft insurance without deductible for 320 euros plus fuel The last rental is about 10 years old, if you have any tips I should still choose diesel, bring me the Adac card what, I get somewhere an upgrade voucher and since it is in Munich I will choose Einsteinstr. there was always a big offer. Whether it becomes a 7 or Jaguar not so important, Jaguar nevertheless interesting can not remember to have seen it at all live in Munich in general or will I eat with something different/small t. Thanks in advance and tips in advance I should be careful or mindful. greetingsssssssssssssss P.s: Do I have to make the reservation via net. or can I go with the desire directly to any station or the destination is better to me but does this work ?