Can anyone comment on what I might get as an upgrade in Dubai? I am a Sixt Diamond, and Sixt's cars are quite a bit more expensive than Avis/Europcar (at this location) - in the order of $50-70 for an Economy, which is basically double. Were I to rent an Economy (EDAR), could I possibly hope for any sort of a "fun" upgrade, or am I better off not risking it and saving the money for this particular rental? Never rented from DXB.