The German found one tenth in the opening sector compared with his Envision rival before increasing the gap to more than three tenths in the second timing zone.
Buemi pulled a tenth back in the final sector, but the margin remained 0.251s after Wehrlein, running ahead on track, posted a 1m13.298s.
Buemi had made it through to the final after posting a 1m13.241s as the fastest time in all three sectors was enough to beat Jaguar’s Mitch Evans in the semi-finals.
The Kiwi is set to lose a position after receiving a one-place grid drop for failing to follow red flag procedure in FP1 as the car “did not enter into its garage” after returning to the pitlane.
Wehrlein, meanwhile, bested Nick Cassidy by 0.266s in their semi-final duel, with the second Jaguar driver also set to drop a position having fallen foul of the same new red flag procedure.
A 1m13.103s from Evans was easily the best time from the quarter-final stage of qualifying, and meant he beat Maserati MSG’s Maximilian Guenther by more than four tenths to progress to the semi-finals.
The closest quarter-final battle was between Buemi and McLaren’s Jake Hughes, with the pair separated by only 0.173s, while a small error in the middle sector cost Stoffel Vandoorne in his duel with Cassidy who also made a tiny correction in the final sector but did enough to progress.
Source: Autosport