The new system allows engineers to pick common items from a Mercedes parts bin when designing its new cars. Mercedes previously went from using six different sunroofs to just one, which enabled a cost saving of 25%. Other new components to be shared will likely be seat structures, electronic architectures, sensors, wiring and software. The new C-class is the first model to take advantage of the cost-effective design strategy, using parts in common with the current E-class as well as the previous-generation model.