Toto Wolff wants Mercedes to focus on bringing together components to improve its Formula 1 performance as he cannot single out a specific area.
Mercedes is currently enduring a run of only one podium in the last six races as of the Italian Grand Prix - Lewis Hamilton's third at Silverstone - which is the team's equal-worst in the turbo hybrid era, jointly held with the Bahrain-Monaco leg earlier in the season.
The team is struggling to make in-roads into the runaway Red Bull RB19, with Wolff sure that every piece of the package needs to be improved - but was left optimistic for the upcoming Singapore Grand Prix and the high downforce package that has suited the W14.
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Wolff can't pinpoint single area
"Last year, we were 1.2 seconds off [in qualifying] at Monza," Wolff told media including RacingNews365, with Hamilton's Q3 time 1.363s behind Charles Leclerc's pole effort.
"It was certainly better this year (with George Russell 0.378s down on Carlos Sainz's pole time), and we are making improvements and we are closer to the cars that are generally more competitive on high downforce.
"Let's see how it swings around in two weeks' time and whether we can outperform them in Singapore.
"We have a few directions [on things to change with the car] and if we knew the direction [to take], it would be much easier.
"But the car is unpredictable and lacks grip, so there are plenty of things that we need to tackle, but we tend to believe in Formula 1 that there is a silver bullet that is going to unlock everything.
"We just need to put components together to make them work together in the car, there is not one [area] that I would call out."