Red Bull briefly looked set for a front row sweep until points leader Lewis Hamilton got between Vettel and Webber. Despite its practice pace, Shanghai winner Mercedes had a disappointing session. Nico Rosberg could only qualify fifth, and his team-mate Michael Schumacher did not even get beyond Q1.
Jenson Button completes row two in the second McLaren. Rosberg only made one Q3 run and was 0.4 seconds off the pace in fifth. Daniel Ricciardo gave Toro Rosso huge encouragement as he stormed to a career-best sixth on the grid, in front of Romain Grosjean's Lotus and Sergio Perez's Sauber.
Fernando Alonso got Ferrari into the top 10, then elected not to do a Q3 flying lap, as did Paul di Resta - who got Force India into the pole shoot-out despite having missed out on Friday afternoon practice. The pair will share row five, with Alonso five places ahead of Ferrari team-mate Felipe Massa. Schumacher's exit in Q1 was the shock of the session, and was down to both a problem with the Mercedes and a supreme lap from Caterham's Heikki Kovalainen.
Pos Driver Team Time Gap
1. Sebastian Vettel Red Bull-Renault 1:32.422
2. Lewis Hamilton McLaren-Mercedes 1:32.520 + 0.098
3. Mark Webber Red Bull-Renault 1:32.637 + 0.215
4. Jenson Button McLaren-Mercedes 1:32.711 + 0.289
5. Nico Rosberg Mercedes 1:32.821 + 0.399
6. Daniel Ricciardo Toro Rosso-Ferrari 1:32.912 + 0.490
7. Romain Grosjean Lotus-Renault 1:33.008 + 0.586
8. Sergio Perez Sauber-Ferrari 1:33.394 + 0.972
9. Fernando Alonso Ferrari No time
10. Paul di Resta Force India-Mercedes No time
Q2 Fastest time: L.Hamilton 1:33.209 Gap
11. Kimi Raikkonen Lotus-Renault 1:33.789 + 0.580
12. Kamui Kobayashi Sauber-Ferrari 1:33.806 + 0.597
13. Nico Hulkenberg Force India-Mercedes 1:33.807 + 0.598
14. Felipe Massa Ferrari 1:33.912 + 0.703
15. Bruno Senna Williams-Renault 1:34.017 + 0.808
16. Heikki Kovalainen Caterham-Renault 1:36.132 + 2.923
17. Pastor Maldonado Williams-Renault No time
Q1 Fastest time: M.Webber 1:34.015 Gap
18. Michael Schumacher Mercedes 1:34.865 + 1.051
19. Jean-Eric Vergne Toro Rosso-Ferrari 1:35.014 + 1.200
20. Vitaly Petrov Caterham-Renault 1:35.823 + 2.009
21. Charles Pic Marussia-Cosworth 1:37.683 + 3.869
22. Pedro de la Rosa HRT-Cosworth 1:37.883 + 4.069
23. Timo Glock Marussia-Cosworth 1:37.905 + 4.091
24. Narain Karthikeyan HRT-Cosworth 1:38.314 + 4.500
* Pastor Maldonado have penaly of 5 grid places for gearbox change