Lewis Hamilton topped the timesheets as practice got underway in hot and humid conditions in Kuala Lumpur on Friday morning.
The 2008 world champion set a best time of 1m 40.691s to finish marginally ahead of Ferrari’s Kimi Raikkonen, with the other Mercedes of Nico Rosberg third fastest.
Last weekend wasn’t without problems for Mercedes as an engine issue put Hamilton out of the grand prix early in the race. The McLarens finished second and third with Kevin Magnussen runner-up ahead of Jenson Button.