The price difference between IDAR and LDAR was only approximately €30 for the entire weekend.. but from LDAR to XDAR, it was another €70.
By the way, it's been a while.. what kind of fleet does Sixt have in FRA? So far, I've heard of Benz S320 and Audi A8. Do you know if Sixt has any turbo diesel vehicles in its XDAR fleet?