Which type of vehicle information must dealers disclose under ethical practices?

Dealers are ethically obligated to disclose all known safety and mechanical defects. This requirement aims to protect consumers and ensure they make informed decisions when purchasing a vehicle. A vehicle with undisclosed defects could pose a significant safety risk and can lead to substantial financial burdens for buyers if issues arise after the sale. Transparency in this area helps to foster trust between the dealer and potential buyers, ensuring that customers have a complete understanding of what they are purchasing.

While the other options may contain relevant information, they do not hold the same level of ethical obligation. For example, disclosing the country of origin for parts, estimated depreciation rates, or historical price changes may provide valuable insights, but they do not directly relate to the safety and operational integrity of the vehicle. Thus, prioritizing the disclosure of safety and mechanical defects aligns with ethical practices in the automotive sales industry, underscoring the importance of consumer safety and informed consent.