I tried by e-mail to firstname.lastname@example.org
(Sixt Platinum), but i received a negative response:
The Hertz Status Match program was established to match your current member status with Avis or National / Enterprise. In order to process a status match, please provide a copy or screen shot of your Avis (Preferred Plus / First or President Club), Enterprise (Silver, Gold or Platinum) or National (Executive or Executive Elite) membership card or statement for further review. We are unable to provide a status match for any other programs through Hertz Status Match.
I regret Hertz does not currently match Sixt at this time. I apologize for the inconvenience this causes.