Please see the guide below on which Model S generation you may own:
1.0 (2012 - September 2016): The most notable difference is the front fascia between 1.0 and 2.0. 1.0 has the rounded nose with chrome edging. 1.0 also does NOT have an interior center console installed.
2.0 (September 2016 - 2021): The front fascia is completely different with no nose. The interior also DOES include a center console.