Tesla earns a prominent spot among the front-runners of the luxury car market with the Model S, going neck and neck with the likes of Mercedes-Benz.

The carmaker doesn't publish sales reports by country, making outside measures necessary to crunch the numbers. According to a variety of analysts, the figures have been increasing for the sedan.

EV Obsession estimates that 26,566 units of the Tesla Model S were sold in the United States in 2015.

Meanwhile, user RobStark of Tesla Motors Club concludes that 24,200 is the lowest estimation at the other end of the spectrum.

At any rate, the Tesla Model S comes out on top in terms of sales compared with BMW's 6-Series and 7-Series, Audi's A7 and A8, the Porsche Panamera, the Mercedes S-Class and just about any other vehicle in the same division.

For the record, Mercedes wouldn't be placed below Tesla when other vehicles in the same class of the German automaker are taken into account. On the other hand, the outcome for BMW and Audi would more or less remain the same, where they're behind Tesla.

In other related news, it should be noted that in the fourth quarter of 2015, Tesla was able to ship out about 17,400 units of the Model S in the span of three months. To emphasize this achievement, the carmaker broke its previous record clocked at 11,574 during the third quarter of 2015, gaining about 50 percent more in contrast and 75 percent more than in the fourth quarter of 2014.

As for the annual sales of 2015, Tesla managed to deliver 50,580 electric vehicles, barely penetrating the lower end of the carmaker's projection of 50,000 to 55,000 units.

Seeing as Tesla doesn't have the same capacities as Mercedes, BMW and Audi possess regarding production, dealer networks and brand name, topping the charts this time around is a remarkable feat.

More to the point, the Model 3 is about to make a splash in the market, where it's going to be unveiled in March 2016 and roll out sometime in 2017. It's expected to pose a challenge to vehicles such as the BMW 3-Series, Audi A3 and the Mercedes A-Class, to name a few.

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