Who designed the car which succeeded the The Mercedes-Benz W25?
Mercedes-Benz W25: The Mercedes-Benz W25 was a Grand Prix racing car designed by Daimler-Benz AG for the 1934 Grand Prix season, in which new rules were introduced, and no championship was held. Mercedes-Benz W25:  In modified form, the W25 remained in use until 1937, when it was succeeded by the Mercedes-Benz W125.
i don't know