The data indicates that all vehicles within the specified Mercedes-Benz C-Class (2014-19) C300 4DR Saloon model, with the detailed description provided, are equipped with an engine capacity of 2.143 liters. Moreover, every vehicle in this sample uses a hybrid fuel system combining diesel and electric power. This suggests a uniformity in both engine size and fuel type across this particular model, reflecting a standardized powertrain configuration for this variant.