
Preining took the start in seventh but was slowly able to carve his way through the field on a wet track, overtaking polesitter Maro Engel for the lead on lap 16 of 35.
A slow 11.2s pitstop left him vulnerable to the Mercedes of Luca Stolz, but he was able to rejoin the track in the lead before cruising to a comfortable 4.6s win.