11 disappearing car featuresRadio knobs are making a comeback, but lots of other features are headed to extinction.Alex Taylor IIIJuly 2, 20131. Manual transmissions 2. Keys 3. Crank windows 4. Antennas 5. Handbrake 6. Bias-ply tires 7. Bench seats 8. Hardtop convertibles 9. 85 mph speedometers 10. Spare tires 11. Hinged vent windows