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Which interior lamp function is controlled by the door switches?

  • A.The map reading lamp, which is switched by the occupant and is therefore independent of the doors of the vehicle
  • B.The boot lamp
  • C.The ambient lighting, which is illuminated whenever the vehicle is unlocked and dims once the doors have been closed
  • D.The courtesy lamp

Answer: D

Courtesy lamps light when a door opens and fade out after it closes. Ambient lighting genuinely does follow the unlocking sequence on many vehicles, which makes the last option a real modern behaviour of a different lamp. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. The shared behaviour explains why these belong together and the differences explain why both exist. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

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