Booking a luxury car

What do I need to provide for renting a luxury or special vehicle? 

For luxury cars, payment must be made using a major credit card only. Debit cards are not accepted. These are car models that are not within the following groups: E***, C***, I***, S*** and F***. Extraordinary cars in the group X*** require a credit card approval of 750.00 GBP + rental amount.