Sixt - SIXT Diamond- Which upgrades can I expect?

Question to all SIXT-Diamond-card holders:

Finally I received my Diamond status.
It was upgraded online yesterday and I guess I will receive my new card within a few days.

What is your experience regarding upgrade policy for Diamond-customers?
When booking "Golf"-class, "3er BMW series" or "BMW 525", what upgrades may I expect at either airport- or normal stations.

Thanks for sharing your experiences.

Usually a PDMR booking will result in an S-Class. What was your number of Rentals p.a. ?

Usually a PDMR booking will result in an S-Class. What was your number of Rentals p.a. ?

Approx. 80 rentals per year with SIXT.
Kwoj, thank you.