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Has Mercedes really cracked Formula 1's ground effect regulations?
It heads into the 2024 season-opening Bahrain Grand Prix off the back of a far more encouraging testing period than it experienced in the psat two years?
But it's had some rude shocks when it actually came to qualifying and racing over 2022 and '23.
So has it really done enough with the W15 to get back on a proper path towards recapturing its glory days?
Our video explores what we've learned about its new car so far, and some of the potential pitfalls.
