Brawn must buy KERS from McLaren

(GMM) Brawn GP will have to pay more to McLaren if it wants to use the team's KERS system later in 2009.

The former Honda team is currently not running the new energy-reuse technology, having focused over the winter on surviving and accommodating the 2009 car for a Mercedes engine.

A side-effect of the dash to accommodate a different engine is that the car is currently running heavier than Brawn would like.

"That makes it quite difficult to install KERS," team boss Ross Brawn told reporters at Sepang on Friday.

The Briton admitted that his current commercial arrangement with McLaren and Mercedes is for engines only.

"We have had some tentative discussions about KERS but it is a little bit early for us to engage properly on that," Brawn added.