purchase, owners have the option to unlock the additional 15 kWh, bringing the 60D to 75D range specifications. Global sales passed the 10,000 unit mark in August 2016, with most cars delivered in the United States. In August 2016, Tesla introduced the P100D with Ludicrous Mode to be the new top Model X. The P100D has a 100 kWh battery, accelerate from in 2.9 seconds ( in 3.1 seconds) and of range. In October 2016 Tesla discontinued the 60D version and made the "Smart Air Suspension" standard instead of coil springs, increasing the base price to $85,000. In June 2017, the 90D version was discontinued. In August 2017, Tesla announced that HW2.5 included a secondary processor node to provide more computing power and additional wiring redundancy to slightly improve reliability; it also enabled dashcam and sentry mode capabilities. In March 2018 it was announced that Tesla upgraded the MCU to version 2. MCU 2 improved the performance of the 17 inch center console screen. Global cumulative sales since inception totaled 106,689 units through September 2018. In January 2019, Tesla discontinued the 75D version, making the 100D the base version of the Model X. The base price of the Model X 100D is $97,000 as of Jan 2019. In July 2019, Tesla added a Long Range model of the Model X with a 325-mile EPA range priced at $84,500. In an engineering refresh in May 2019, range was increased to and smart air suspension was added. In February 2020 Tesla increased the range of the Model X to of range. In October 2020 Tesla increased the range of the Long Range Plus to , and the Performance increased to . Starting from 2020, modified Tesla Model X (with umbilical for the astronauts) were used to transport astronauts, especially for SpaceX Commercial Crew Program missions from NASA, for examples: Crew Dragon Demo-2 – the two vehicles used had the NASA meatball logos on the driver and passenger doors, while the Worm logos were on the upper part of the rear window, and have special license plates, dubbed ISSBND for "ISS Bound". SpaceX Crew-1 – the three vehicles used had same characteristics as Demo-2 except for the special license plates, dubbed L8RERTH for "see you later, Earth". SpaceX Crew-2 – the three vehicles used had no NASA logos (both meatball and worm) and have special license plates, each of them dubbed "REDUCE", "REUSE",