I actually don't think Se senses it. Se and Ne are about something entirely different. But still, as you mentioned, the car is there. How is that possible? One solution is that the so-called unconscious functions are semi-conscious instead. And the Vital/semi-conscious functions run in parallel with the Mental functions, so you always get an image (of the car). Another solution is related to my Model D, which has Si+ and Si-. So you always have a conscious Si.