Based on the available data, all sampled Mercedes-Benz C-Class Saloon vehicles (2018-21 model) with the specified variant are from the year 2019. This indicates a uniformity in the manufacturing year within the sample, suggesting that vehicles of this specific model and trim are predominantly from 2019. This could reflect either a production peak or higher market availability for that year.

The data indicates that all observed vehicles of the Mercedes-Benz C-Class Saloon (2018-21) C300 4MATIC 4DR model are equipped with a 2.0-liter diesel engine, accounting for 100% of the sample. Additionally, every vehicle in the sample uses diesel as its primary fuel type, suggesting a complete dominance of diesel engines within this particular model and specification. This could reflect the market preference or manufacturer’s focus for this variant during the production years.