It appears, pending inspection of the damage to his crashed chassis that Webber will now be using Vettel's old car.
While RBR claims the flaws in the chassis have been repaired, I'm predicting this will be the undoing of any run for the title Webber had this season. Vettel had a lot of troubles with that chassis.
http://planetf1.com/news/18227/62466...-s-old-chassis