Some additional research ideas
Add a new assembly slot between Fit Body Shell and Fit Hood, called Install Wire Harness. This is where the main wiring for the car is installed before the rest of the car is assembled. New research ideas: Enhanced Wiring allows for some early tech like electric windows, central locks. Advanced wiring allows for for advanced tech like reversing camera, keyless entry, touch screen, etc. This may help gate some of the more advanced technology form the start.
Add a new assembly slot before Fit Power Train or split it into Fit Transmission and Fit Engine. Add manual transmission at the start and upgrade to basic 6 speed transmission, 6 speed advanced transmission, 8 speed transmission, Continuous Variable Transmission.
There are heated seats and leather interior and Nappa leather Seats. Should there be heated leather seats and heated Nappa leather Seats? By leather interior does that neat the seats or the rest of the interior?
Expand the Windscreen (Called windshield in US) wipers. It should start with basic wipers, variable speed wipers, intermittent wipers, automatic wipers
The Heater should be Heater and Air Ducts as that is what is installed in the car. A separate item (Electric Heater) should be researched and a part used for heated seats, Heated Wind Mirrors, add heated steering wheel, rear window defroster.
Lane Departure Warning is a radar sensor that is installed on the windscreen (windshield) that scans the road ahead and dives a warning if you leave the lane. A Blind Spot Warning is both a sensor and indicator that is installed in the wing mirrors.
Split Fit Lights into Fit Front/Head Lights and Fit Tail Lights. Add upgrades to Fit Tail Lights to add turn signals, center break light.
Driver airbag should be added to Fit Steering Wheel. Side Airbags can be added to Fit Doors.
Also it would be nice to add a little description rearrange the tool tip for research items. Example for Keyless Entry:
Keyless Entry allow the driver to open the doors by putting their hand on the door handle if they have a chip key.
----------Unlocks At Slot ----------------------
Fit Doors Panel
------- Requires the Following ---------------
Process: Doors Specialization
Technology: Advanced Wire Harness
Finally what is the difference between Auto Steer headlights and Directional Headlights?
Can add high beam lights as an early tech upgrade to Fit Lights or Fit Front/Head Lights.