It's unveiled on same day as Lewis Hamilton's new Mercedes
Of 20 cars that started, only 12 finished.
"Mercedes power is definitely better than Ferrari power," said Hamilton after the race.
The Ferrari driver is only seven points clear of Lewis Hamilton.
"I love this team," Vettel said.
Lewis Hamilton second-fastest going into his 200th race
He's 14 points behind Sebastian Vettel as the Formula One season's second half begins.
Vettel's lead in the 2017 championship stretches to 14 points.
Four in a row for Hamilton, five British Grand Prix victories in all.
But Sebastian Vettel is right on his tail.
Hamilton says Vettel called him after the race.
And Fernando Alonso returns to F1 after racing at Indy.
"It was a very tense race. I knew that (staying out) was the chance to win and I was able to use that window and come out ahead. After that I was able to control the gap behind," said Vettel.