The data indicates that all surveyed vehicles of the specified Mercedes-Benz A-Class Saloon (2018-23) model, including the A250E 4DR Saloon with a 1.3L engine and plug-in hybrid electric system, are powered exclusively by hybrid electric technology. Additionally, the engine capacity for this group is consistently 1.3 liters, suggesting a uniform engine size across the sample. This reflects a clear trend towards hybrid electric powertrains in this model range, likely driven by emissions regulations and market preferences for eco-friendly vehicles.