Come on, Diamonds: Open a new thread and post your Sixt upgrade successes!
For example: Booked MCMR, got XDAR at FRA

I would be more interested in getting diamond as europcar wanted to give me a c180 estate with 38.000km and the rubbish satnav which doesnt know there are countries around germany yesterday for a clmr booking with FIRST. and they actually think this is a great upgrade. (settled for an a3 2.0tdi satnav)