Lewis Hamilton's power unit is performing "normally" according to Mercedes, amid fears it was severely damaged during the Brazilian Grand Prix.
Hamilton is running the same engine that powered him to victory in Brazil, however it was turned down in the final laps of the race and the team believed it was just a couple of laps away from failing completely.
However the Briton ran it during practice on Friday in Abu Dhabi and reported no problems, with Mercedes monitoring it carefully to determine whether it required replacing, which could result in a grid drop.
"We ran through a number of checks on the power unit and so far it all looks normal which is good news," explained Mercedes' head of trackside engineering Andrew Shovlin.
"You always struggle a bit more with overheating in FP1 but other than that, the car seemed to be working OK."
Hamilton was fourth quickest in a closely-fought FP2 which saw his team-mate Valtteri Bottas come out on top, albeit with only 0.333s splitting the top six cars.
Shovlin is expecting the entire weekend to be tight battle between Mercedes, Ferrari and Red Bull.
"It's nice coming here and not having to worry about the championships but the team and both drivers are wanting to finish the season in style, so we'll be attacking the weekend with our normal focus and determination," he added.
"This is a race where qualifying is very important and from the times today, it looks like it's going to be quite tight between Ferrari, Red Bull and us.
"We've definitely not got everything out of the package today so we will work hard overnight as we'll need every last bit if we want to get the cars on the front row for the race on Sunday."
