Mercedes are still wary over Nico Rosberg’s engine problem at Monza as there is a “big question mark” over their new power unit.
The world champions was forced to change Rosberg’s brand new engine ahead of qualifying at Monza following find out a trouble, but could not trace the root cause of the issue.
Rosberg suffer a poor qualifying session and will start Sunday’s race in P4, behind his nearest title rival and pole-sitter Lewis Hamilton as well as the Ferraris of Kimi Raikkonen and Sebastian Vettel.
Team boss, Toto Wolff revealed after the qualifying, that they still have to find the underlying cause of the problem and says there are no guarantees that Hamilton’s new engine won’t have similar problems.
“We simply don’t know what the root cause of the problem on Nico’s engine was and we don’t think it is performance related,” Wolff said.
“We haven’t yet identified the problem so there is still a big question mark about what’s actually happened and the potential risks for Lewis tomorrow.”
“It was clear today that even if we would have found out what the problem was, we couldn’t change two engines. So we did it on Nico’s car.
“If we find out that it is a major issue and this is something that would put Lewis’s engine at risk and Lewis’s race at risk this would certainly be something we would consider because our car has great pace and it is better to play it safe. He added
“But at this very moment we don’t know that and I still have the belief that it’s something we can solve.”