What results in increased fuel consumption of your car?

Your answer includes all the correct factors that contribute to increased fuel consumption: a roof rack or ski rack and transporting unnecessary objects. According to German traffic regulations, these factors create additional drag and weight, leading to lower fuel efficiency. The regulation emphasizes that drivers should minimize unnecessary load and aerodynamic resistance to optimize fuel economy and reduce environmental impact. Proper vehicle loading not only enhances performance but also promotes safer driving by ensuring stability and handling. Always consider the impact of additional accessories and cargo on your vehicle's efficiency and compliance with traffic regulations.