I am a new owner and I have a question someone on this forum must have the answer to. Looking at my headlamps there appears to be 5 ridges that look as though it is designed to hold 5 LEDS. I am sure somebody has the answer, that will avoid me having to take a headlamp off the car to explore the underside.
For most Gen3s, those are merely decorations. I seem to remember that some version -- the PiP? -- had actual LEDs in there, but the great majority of us do not.