Williams will not deploy KERS technology until after at least the first six races of 2009, according to team driver Nico Rosberg.
The Grove based team has taken a novel approach to the controversial energy re-use technology, buying into a hybrid power company and designing a mechanical flywheel solution that is said to be safer and less expensive than the more popular battery-based systems.
But Kazuki Nakajima last week admitted that he has never pressed the KERS button on the Williams steering wheel, and teammate Rosberg revealed that the situation is not likely to change for some time.
"For sure we will race the first six races without KERS," he is quoted as saying by the Swiss newspaper Blick.
Round 7 of the 2009 world championship takes place in Turkey in early June.