DC to stick with launch control.

David Coulthard has said that he will be sticking with McLaren's launch control system at this weekend's Canadian GP despite the fact it has let him down on two occasions already this year.

The Scot told the BBC: "We intend to keep using the system because in all the simulations we have carried out up to now it showed itself to be much quicker than the manual start."

He added: "In all the tests the part of the system that failed in Monaco has worked perfectly. The difficulties in Monaco and Spain were different but we're almost certain to have resolved the problems."