I don't visit this forum frequent enough but I rent from Sixt pretty often so here's some data points for you guys.
Location: BCN
Status - Platinum (status match)
Reserved - Audi A4 Avant (FWAR)
Offered - Audi A4 Avant or paid upgrade to a BMW 4 series
Received - Audi A4 Avant TDI (sadly not Quattro) (FWAR)
Location: Stuttgart Zentrum
Status - Platinum (status match)
Reserved - BMW 430 Coupé (LSAR)
Offered - BMW 740d or Some unnoteworthy Cupra/SUVs, they barely had any cars there... taking the 740d was a no brainer.
Received - Fully loaded BMW 740d
Location: SEA
Status - Platinum (status match)
Reserved - BMW 3 Series (LCAR)
Offered - BMW X5 xDrive50e
Received - BMW X5 xDrive50e
Location: MCO
Status - Platinum (status match)
Reserved - BMW 5 Series (XCAR)
Offered - BMW X5 for free, 430i at a cost
Received - 430i convertible at no charge
Location: LHR
Status - Platinum (status match)
Reserved - Skoda Octavia (IDMR)
Offered - BMW X1, a bunch of other unnoteworthy appliances.
Received - Vauxhall Grandland X Manual (Unfortunately we had a lot of luggage and 4 adult to carry, we needed the space)
Location: PHX
Status - Platinum (status match)
Reserved - BMW 430 Coupé (LSAR)
Offered - BMW 430 Coupé or BMW M4 Competition at a reasonable upcharge
Received - BMW M4 Competition at a reasonable upcharge
Location: YVR
Status - Platinum (status match)
Reserved - BMW 2 Series Coupé (PSAR)
Offered - BMW 330i
Received - Pervious year BMW 330i
Location: EWR
Status - Platinum (status match)
Reserved -BMW 3 Series (LCAR)
Offered - BMW 3 Series
Received - Brand new 330i with 26 miles on the clock
Location: DEN
Status - Platinum (status match)
Reserved - BMW X5 (XFAR)
Offered - Was told I can take anything on the lot, 3,4,5, x3, x5, XC90, CX-90, some Genesis, etc. can't remember the rest.
Received - Fully Loaded 540i xDrive (XFAR)
Happy New Year all,
Good luck on the upgrades in 2025!