"The start was very important. we started from the dirty side," said Vettel. "I had a very good launch and could see that Mark was struggling a little bit. I was able to get side by side and then had the inside into turn one.
"It was a perfect start for myself," added the German, who spent the closing laps fretting about the tyres and making sure they held up.
With no need to attack his title-chasing team mate in the closing stages, Webber finished 8.2 seconds behind Vettel.
Image: Red Bull driver Sebastian Vettel, right, of Germany performs with South Korean rapper PSY and his " Gangnam Style" dance before the Korean Formula One Grand Prix at the Korean International Circuit in Yeongam, South Korea, Sunday, Oct. 14, 2012.