Jenson Button is set to take a 15-place grid penalty for his Formula 1 comeback at the Monaco Grand Prix after an engine problem was detected on his McLaren-Honda. The penalty makes it near-certain that Button will be at the back of the grid for his one-off F1 return to cover for Fernando Alonso's Indianapolis 500 effort. Honda announced on Saturday morning that a problem had been discovered in the MGU-H of Button's car following Thursday's practice sessions and that it required both the MGU-H and turbocharger to be replaced. As both were the fifth such components fitted to the car this season, that exceeded the four-per-year limit and prompted the penalty. Although Monaco is Button's first...
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