This is total BS.
I maintain spreadsheet with Tesla production and deliveries data compiled using delivery press releases, shareholder letters and quarterly reports. At the end of Q4 2016 Tesla produced 6,091 more MS than it delivered, and 6,418 more MX, for a total 12,509 more cars produced than delivered.
These 12,509 cars included 6,450 vehicles in transit to customers at the end of Q4 2016, as well as estimated fleet of 3,352 marketing and loaner cars (see details below). The balance are Tesla new vehicles in sales inventory: 12,509 - 6,450 - 3,352 = 2,707. To put this number in perspective, conservatively assuming average turnover of new vehicles inventory of 3 months, based on about 25k vehicles produced per quarter, the ratio of cars sold through customer orders vs. new inventory is about 89% to 11%.
According to the
Tesla Q4 2016 Production and Deliveries press release:
Based on information from the Tesla Website here are the totals for Tesla Stores, Galleries and Service Centers by country, with my estimated total for fleet of new vehicles in Tesla marketing and loaners fleet (loaners fleet includes used trade-in cars as well, but I do not count them here):
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