Formula E Paris ePrix 2017
Buemi, of the Renault E.dams team, finished ahead of Argentina's Jose Maria Lopez (DS Virgin Racing) and Germany's Nick Heidfeld (Mahindra) in a race fought out around the picturesque Esplanade des Invalides.
Di Grassi, the winner in the French capital last year, crashed into the barriers four laps from home and retired.
Results:
Sebastien Buemi (SUI/Renault E.dams)
Jose Maria Lopez (ARG/DS Virgin) at 0.707
Nick Heidfeld (GER/Mahindra) 2.043
Felix Rosenqvist (SWE/Mahindra) 2.621
Nicolas Prost (FRA/Renault E.dams) 3.521
Robin Frijns (NED/Andretti) 7.999
Nelson Piquet junior (BRA/Nextex) 32.420
Tom Dillmann (FRA/Venturi) 32.929
Mitch Evans (AUS/Jaguar) 33.369
Stephane Sarrazin (FRA/Venturi) 34.051
World championship standings (after six rounds):
Sebastien Buemi (SUI) 132pts
Lucas di Grassi (BRA) 89
Nicolas Prost (FRA) 58
Nick Heidfeld (GER) 47
Jean-Eric Vergne (FRA) 40