So I had a PCAR reservation hoping for the Mercedes CLA. However they claimed none were available..neither were BMW, Volvo, or Audi ...so I got a cadillac.

I got the feeling they don't stock, or very limited amounts of Mercedes/BMW/Volvo PCARS. I did see a few of these cars in two door on the lot, but not the 4 doors PCAR. If they are going to advertised the Mercedes CLA then they need to stock them in reasonable numbers. One Sixt worker told me they had one CLA but it was being reserved for another customer.

I would not rent a PCAR from Six LAX and expect a European car...odds are heavy you will receive a Hyundai or Cadillac.

Also it should be known that apparently they don't stock all the cars at this parking garage connected to the Renaissance hotel. For the Cadillac we had to wait 25 minutes for them to retrieve the car from another remote lot.