The data indicates that the majority of the Mercedes-Benz E-Class Saloon (2016-20) E350 4DR models are manufactured in 2020, accounting for 76.4% of the sample. Vehicles from 2019 comprise the remaining 23.6%. This suggests a recent production focus on the 2020 models, which could be due to higher demand or recent manufacturing cycles. Overall, most of these vehicles are relatively new, primarily from 2020.

Based on the available data for the Mercedes-Benz E-Class Saloon (2016-20) E350 4DR Saloon 2.9D DPFR SS 286 EU6 AMG Line Night Edition Premium Plus 9G-T+ Auto, all vehicles are powered by a 2.925-liter diesel engine. The data indicates a uniformity in engine capacity and fuel type across the sample, with 100% of vehicles using diesel as their primary fuel. This suggests that this particular model consistently features a diesel engine, likely reflecting market preferences or manufacturer specifications for this trim and model year.