Postpublished at 06:20 Greenwich Mean Time 27 March 2015
And Nico Rosberg is straight to the top of the order with a 1:40.438.
Summary
Hamilton fastest in second practice, Raikkonen 2nd
Hamilton experienced engine and telemetry trouble
Champion completed few laps
Merhi and Vettel spin, Kvyat has engine trouble
Relive both P1 & P2 in 'Live Coverage' tab
Postpublished at 06:20 Greenwich Mean Time 27 March 2015
Postpublished at 06:19 Greenwich Mean Time 27 March 2015
Image source, MercedesOut goes Nico Rosberg for his first run in second practice. No sign of Lewis Hamilton joining him yet.
Postpublished at 06:18 Greenwich Mean Time 27 March 2015
Sixteen drivers have clocked timed laps with just under 20 minutes of the session gone. Sebastian Vettel improves at the top of the timesheet with a 1:40.652.
Postpublished at 06:17 Greenwich Mean Time 27 March 2015
Image source, LotusLotus: Unsurprisingly, we've brought Pastor in for a spot of checking, general tidy... Maybe even a light dusting...
Postpublished at 06:15 Greenwich Mean Time 27 March 2015
Image source, formula 1A problem with Pastor Maldonado's Lotus as part of the bodywork around one of the sidepods has seemingly popped out. Back to the pits he goes as his team-mate Romain Grosjean locks up and goes off at Turn One moments later.
Postpublished at 06:11 Greenwich Mean Time 27 March 2015
Much better from Kimi Raikkonen as he gets round the Sepang circuit in 1:41.002, putting him top of the timesheet before his Ferrari team-mate Sebastian Vettel nudges ahead of him with a time that is just 0.022s faster.
Postpublished at 06:08 Greenwich Mean Time 27 March 2015
Will Stevens puts the first time on the board with a 1:46.705. Kimi Raikkonen clocks a 1:53.853 soon after but reports poor traction coming out of the final corner.
Postpublished at 06:06 Greenwich Mean Time 27 March 2015
Nico Rosberg is in no rush to head out. He's chatting with Mercedes engineers while Lewis Hamilton waits for work to be done on his car.
Postpublished at 06:03 Greenwich Mean Time 27 March 2015
Manor's Will Stevens is the first to brave the heat and venture on to the circuit and a few minutes later he has Kimi Raikkonen for company.
Postpublished at 06:01 Greenwich Mean Time 27 March 2015
James Allen
BBC Radio 5 live commentator"The track temperature is nudging 60 degrees. It is the sort of temperatures you encounter in the desert, so very testing conditions."
Postpublished at 06:01 Greenwich Mean Time 27 March 2015
Tom Clarkson
BBC F1 pit-lane reporter"The cockpit temperatures are now up to 50 degrees Centigrade, it is sweltering but that will not be concerning Lewis Hamilton. Mercedes have never had this problem before, it is a problem with the inlet system. Mercedes are beavering away and we will certainly not see him for the first 30 minutes of the session."
Go! Go! Go!published at 06:00 Greenwich Mean Time 27 March 2015
On comes the green light and 90 minutes of second practice is under way.
Postpublished at 05:59 Greenwich Mean Time 27 March 2015
Image source, Red BullRed Bull:, external Time to gear up.
Live nowpublished at 05:56 Greenwich Mean Time 27 March 2015
Switch on your televisions, or turn on the radio because Formula 1 is live across the BBC right now. You can watch on BBC Two or listen via BBC Radio 5 live sports extra. Both options are available on this very page.
Second practice gets under way at 06:00 GMT and runs until 07:30.
Postpublished at 05:54 Greenwich Mean Time 27 March 2015
Image source, Getty ImagesNico Rosberg also has an, erm, interesting solution to the heat of a Formula 1 cockpit - he's taken to wearing a sanitary towel on his forehead.
"I put [a sanitary towel] on my head in to take up the sweat," he says.
Postpublished at 05:52 Greenwich Mean Time 27 March 2015
Image source, Getty ImagesNico Hulkenberg apparently had a novel trick to cope with the Malaysia heat - freezing his underpants.
I'm not sure if he still does it now, but a few years ago, Hulkenberg would apparently drench his undergarments, external in water and stick them in a freezer to give him a few minutes of coolness. Novel.
Postpublished at 05:51 Greenwich Mean Time 27 March 2015
Andrew Benson
Chief F1 writer in Sepang
Image source, Formula 1"Malaysia's tropical heat and humidity are in full swing as the teams and drivers prepare for second practice. Despite the strong wind on Friday, walking around Sepang in these temperatures is like being in a damp oven. What it must be like for the drivers, wearing four-layer fireproof overalls, fireproof underwear, a helmet and balaclava, in cockpits where temperatures will top 60C does not bear thinking about."
Postpublished at 05:48 Greenwich Mean Time 27 March 2015
Image source, Force IndiaForce India:, external Nico Hulkenberg meeting The Jacksons! They sang "Can you feel it?", and we think they were referring to #FeelTheForce!
Favourite circuits from the pastpublished at 05:45 Greenwich Mean Time 27 March 2015
Image source, Getty ImagesBetween the Formula 1 circus leaving Australia and arriving in Malaysia we got the news that the German Grand Prix would be cut from the schedule.
Nurburgring baulked at paying the hosting fees for the 19 July race and Hockenheim was asked to step in. But track officials failed to agree terms with F1 commercial boss Bernie Ecclestone.
With no German GP on the calendar, it got us reminiscing about the old Hockenheim circuit and twisty stadium section. With that in mind, which circuits that are no longer in F1 do you miss?
Let us know via #bbcf1, external or text in to 81111 (UK only) or have your say on the BBC Sport Facebook, external and Google+, external pages.
Postpublished at 05:45 Greenwich Mean Time 27 March 2015
Andrew Benson
Chief F1 writer in Sepang"Williams were called before the stewards in the break between the first and second sessions after using a set of tyres allocated for use in the first half-hour of the first session when they should not have. The stewards issued a 10,000 euro fine, but suspended it for the rest of the season because they decided the 'infringement was inadvertent and no advantage was gained'."