Green car reports put together this list with Tesla itself so it is probably pretty exhaustive. But you have to also wonder how many improvements they’ve made i their production that doesn’t necessarily make for an option just a better car:

Tesla Model S hardware changes from January through December 2013

  • Power folding mirrors (now included in Tech Package; can be retrofitted to vehicles built after August 1, 2013)
  • Red brake calipers (now included in Performance Package)
  • New wheel option: 19-inch Cyclone / Turbine Wheel (joins previous 21-inch Cyclone / Turbine and 19-inch Aero wheel options)
  • Cold-Weather Package (cannot be retrofitted)
  • Fog Lamps (improved design illuminates a low, broad area below the low-beam’s light path; can be retrofitted to any Model S)
  • Parking Sensors (can be retrofitted to any Model S)
  • Ultra-High-Fidelity Sound Package (cannot be retrofitted
  • Three-Zone, Three-Mode Rear Seat Heaters
  • Wiper-Blade Defroster
  • Washer-Nozzle Heaters
  • Performance Plus Package (upgraded dampers, bushings, stabilizer bars; rear tires 20 mm wider and staggered for better acceleration on low-grip surfaces)
  • Premium Leather Trim (adds leather on the top pad and lower area of the instrument panel, the door panel, the lower pillars, the armrest, and the driver-side airbag cover)
  • Premium Interior Lighting (ambient lighting elements in passenger cabin and rear load bay)
  • Mobile App availability

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