BERLIN—Daimler Truck, the world’s largest truck and bus maker, expects only a moderate market ramp-up of its first electric truck model, eActros, due to its high price, the sales head of Daimler’s brand Mercedes-Benz Trucks said. The cost of an electric truck is three times as much as one with a combustion engine, Andreas von Wallfeld, told an event to present the model on Wednesday, mainly due to battery costs. Wallfeld declined to say how many units the company expects to sell, adding that the gradual ramp-up is also due to quality checks of the eActros. Parity in the total cost of ownership of Daimler’s electric trucks to its conventional ones will be reached by 2025, depending on energy prices and subsidies, Wallfeld said. Daimler will offer the eActros in 12 European countries at first, he added. Other markets such as China, Russia, and South Africa are also of interest, …