Rewards: 73 Gold, R$73,000
Location: SEASON 2
Unlocks from: Own Either Straßenversion Car
Maximum Required PR: 59.5

There are 54 events - 52 Trophy + 2 TT – with each car having a specific TT and 2-event showcase (but the not-yet-available Mercedes comes first).  Only one car needs to be upgraded enough to run the last cup races, but of course you will need to own both for 100%.

Progress Rewards split:
25% - 9GC and R$9,000      [PR 46.0]
50% - 14GC and R$14,000   [PR 49.4 using Mercedes, PR 50.8 for Porsche]
75% - 20GC and R$20,000   [PR 51.6*]
100% - 30GC and R$30,000  [PR 59.5]

*Obviously the LTS-winning All 3’s at PR54.6 gets you past 75% :)

#EDIT# for the record this is how far All 3's gets the Porsche: