Webber left fuming as Vettel muscles in WORLD champion Sebastian Vettel incensed Red Bull teammate Mark Webber last night as he pulled off a risky overtaking move to snatch victory in a pulsating but contentious Malaysian Grand Prix. The German ace went wheel-to-wheel with Webber late in the race, earning a stern rebuke from team principal Christian Horner, before emerging in front and taking his 27th race win. France's Romain Grosjean was sixth, outshining his Lotus teammate and last week's winner Kimi Raikkonen in seventh, with Nico Hulkenberg, Sergio Perez and Jean-Eric Vergne rounding out the top 10. McLaren's Jenson Button was a late retirement. Webber and Vettel exchanged words in the team garage and the Australian was stony-faced during the victory ceremony, spraying little of the customary champagne. Later, Vettel offered a profuse apology to his teammate. Both drivers had been told by their team to hold their positions until the end of the race. "I'm not entirely happy - I think I did a big mistake," Vettel said. We should have stayed in the positions that we were in. I didn't ignore it on purpose but I messed up in that situation and obviously took the lead from Mark. I can see now that he's upset. I want to be honest at least and stick to the truth. I know that doesn't really help his feelings right now. A heavy shower in the hour before the race greased up the track to such an extent that several cars, including Webber's, slid off in the pre-formation drive. Webber moved into the lead when Vettel pitted for medium tyres on lap six. Hamilton provided a moment of hilarity when he briefly pitted in the garage of his ex-team McLaren before being waved on to the Mercedes crew by his bemused former colleagues.