Mercedes chief Toto Wolff has revealed that the outfit came close to retiring eventual Australian Grand Prix race winner Nico Rosberg due to a brake issue with his W07 Hybrid.
Rosberg claimed victory at Albert Park after Ferrari's aggressive strategy for Sebastian Vettel failed to pay off, forcing the former champion to make an extra stop for tyres, clearing the path for Rosberg.
However, Wolff says that Mercedes at one stage had to make a call to keep Rosberg on track, rather than retiring him on safety grounds.
"We did the maths and opted to go with one set of Mediums to the end, with the drivers on the knife edge of endurance and performance," he said.
"Managing tyres and temperatures became a big challenge, with debris causing an overheating brake caliper that almost forced us to retire Nico at one stage.
"Thankfully that was not the case and he led Lewis [Hamilton] home for a hard-fought 1-2.
"A perfect result to start the year, a great job from the drivers to manage and recover the race, fantastic work on the pit wall to give them the right strategy to do so and an incredible team effort from everybody at the factories to get us here.
"We must now sort our starts and look to carry out momentum into Bahrain."