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Which sensor does an automatic levelling system use?

  • A.An accelerometer within the lamp unit, which measures the inclination of the vehicle relative to the horizontal
  • B.A load cell
  • C.A camera reading the road ahead, which determines the position of the beam and corrects it as the vehicle moves
  • D.A suspension height sensor at an axle

Answer: D

Ride height sensors on the suspension report the attitude and a motor tilts the reflector accordingly. Camera based systems genuinely exist for adaptive beam shaping, which makes the last option a real technology serving a different function. Checking which component actually carries the load settles most questions of this kind at once. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Working one numerical case through both cases side by side fixes the distinction better than any rule of thumb.

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