Yes, you can add FSD on top of EAP for $2,000 before 18 March 2019. On or after 18 March, the price of FSD after delivery for those who have EAP will be $4,000. Yes, it does include the free HW3 computer swap. This was confirmed by Elon yesterday
here.
Even though you will get the new Autopilot computer if you buy FSD, it is unclear whether the cameras will be swapped too. Without those, you won't have the Sentry Mode and Dashcam features. These work with AP2.5 but not with AP2.0. In addition, there is a chance the Model 3 could support driverless Full Self-Driving but the AP2.0 Model S won't. It doesn't have the same level of redundancy. Therefore, you might want to consider buying a new Model 3 instead of a used Model S. Also, all Model 3s support Supercharger V3. None of the Model S/X do.
2017 Model 75D
- AP2.0 hardware
- 224 miles range at 75 mph. Source
- $64,950
- 4.2s 0-60
- Doesn't supports Supercharger V3
- The touchscreen is slower (was upgraded on 14 Mar 2018)
- It's a used car
2019 Model 3 LR AWD
- AP2.5 hardware
- 275 miles range at 75 mph. Source
- $47,000 for the car + $3,000 for AP - $3,750 tax credits= $46,250
- 4.5s 0-60
- Supports Supercharger V3
- The touchscreen is faster
- It's a new car