Like Nova is saying, the Emira won't be getting a lot of tech and performance in the Mercedes C43 or C63. The C63 achieves 476 HP with its electric turbo, which is actually bigger than the one in the C43 since it can utilize the 400V battery. I wouldn't be surprised if the engine and turbo combo are tuned in the C63 for more peak power and high boost since they don't have to worry about responsiveness with the electric motor, similar to what's done with the current gen Honda NSX. The C43 electric turbo uses the 48V mild hybrid system. And both engines are longitudinally mounted vs transverse mounted like the A45 and Emira, so there could be packaging limitations in putting the electric turbos into the Emira.