Button hopes rivals struggle with exhaust problems

Jenson Button on Thursday predicted problems this weekend for those teams planning to debut a Red Bull-style exhaust layout.

Ferrari, Mercedes and Renault are planning to run updated cars, with exhausts pointed towards the cars' double diffusers, during the European grand prix event.

Button's McLaren team will not test a similar layout until the British grand prix in two weeks, and the Briton told reporters in Valencia that there is a chance his rivals have got their numbers wrong.

"The floors are going to be getting very hot, so they're going to get through a lot of floors, I'm sure," he said, referring to the fact the layout blasts the car's bodywork with hot exhaust fumes.