Stian Birkeland, I find your list to be very interesting. I proposed a similar idea to John DeLorean years ago. the idea was that he could certify a car as being the newer model years based on the upgrades to the vehicle. For example, 1983 - Twin Turbo/ improved cooling system 1984 - Power Steering 1985 - Time Machine Option Package 1986 - Return of the hood gas flap 1987 - Clearcoated stainless 1988 - Colored tinted transparent stainless clearcoat 1989 - Bose Stereo System 1990 - Larger Power Braking system/ ABS brakes 1991 - 4 speed automatic 1992 - Stainless steel frame 1993 - Aluminum V-8 1994 - Remote starting 1995 - Remote door locks etc. Bob