Yay, a distraction from babysitting my lab
FFF, if you turned on the lights (forgetting of course that at that moment, having a non-zero rest mass, you and your car would have to have an infinite amount of kinetic energy) they would light the way ahead of you because the speed of light is a constant everywhere - that's the headwrecker. You, in the car, would measure the speed of light emitted from your headlamps at c - and so would an observer sitting on a planet as you pass by, even though you're travelling at c yourself....
Of course, while the headlights would light the way, they'd be doing so with gamma rays since as the light source approaches relativistic velocities, the light increases in frequency (the "red shift" and "blue shift" you hear so much about in astronomy), sort of like a doppler shift for light waves.
Ah, that was fun