The data indicates that all vehicles of the Mercedes-Benz S Class (2017-20) S350L 4DR Saloon, with the specified model details, are equipped with a 2.925-liter diesel engine. This uniformity suggests a standard engine configuration for this model during that period, with no variation in engine capacity or fuel type evident from the data. Essentially, the entire sample uses diesel fuel and has an engine capacity of 2,925cc.