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The factory setup has HRA (Headlamp Range Adjustment) which keeps the headlamps pointed a specific distance in front of the car, even when hitting dips and potholes, or when braking or accelarating, as examples. There is a seperate HRA computer, and also front and rear level sensors, the computer output is to range adjustment motors in the headlamp. If someone was desperate enough to want the factory lamps, I suppose one could install them and run the motors until a proper fixed adjustment was achieved. I am unsure how much wiring would need to be changed for the Xenon HID transformer to run the bulbs themselves, that may be cost-prohibitive as well.
Gilly
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