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Identifications of Controls (ECE R121)

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Identifications of Controls (ECE R121)

Identification of Controls

Identifications of Controls (ECE R121)

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    ECE Regulation No. 121 sets forth the uniform provisions concerning the approval of vehicles with regard to the location, identification, and operation of controls, tell-tales, and indicators. This regulation is crucial for ensuring that vehicle controls and displays are designed and located in a manner that is intuitive and easy for drivers to use, thereby enhancing overall vehicle safety and driver comfort.

    The regulation specifies the technical standards for the design, construction, and performance of vehicle controls, tell-tales, and indicators. These standards ensure that the controls are easily identifiable and operable under various driving conditions, and that tell-tales and indicators provide clear and unambiguous information to the driver. The regulation mandates that these components must be tested under different conditions to ensure they meet the required safety and usability criteria.

    Testing procedures are rigorously defined to ensure compliance with the regulation. These tests include assessments of the visibility and recognizability of tell-tales and indicators, the operability of controls under different conditions, and the overall ergonomic layout of the vehicle’s interior. Manufacturers must conduct these tests to demonstrate that their vehicles meet the required standards. The regulation also includes provisions for the durability and reliability of these components to ensure they function correctly over the vehicle’s lifetime.


    The TAT Lab in Iran is authorized to perform testing and certification for compliance with ECE Regulation No. 121. This includes conducting all necessary tests to ensure that vehicle controls, tell-tales, and indicators meet the specified standards for safety, performance, and usability. TAT Lab utilizes advanced testing equipment and methodologies to perform these tests accurately and efficiently. By performing these tests, TAT Lab helps enhance vehicle safety in Iran by ensuring that vehicles are equipped with controls and displays that are easy to use and provide clear information to drivers, thus promoting safer driving practices.


    ECE Regulation No. 121 sets forth the uniform provisions concerning the approval of vehicles with regard to the location, identification, and operation of controls, tell-tales, and indicators. This regulation is crucial for ensuring that vehicle controls and displays are designed and located in a manner that is intuitive and easy for drivers to use, thereby enhancing overall vehicle safety and driver comfort.

    The regulation specifies the technical standards for the design, construction, and performance of vehicle controls, tell-tales, and indicators. These standards ensure that the controls are easily identifiable and operable under various driving conditions, and that tell-tales and indicators provide clear and unambiguous information to the driver. The regulation mandates that these components must be tested under different conditions to ensure they meet the required safety and usability criteria.

    Testing procedures are rigorously defined to ensure compliance with the regulation. These tests include assessments of the visibility and recognizability of tell-tales and indicators, the operability of controls under different conditions, and the overall ergonomic layout of the vehicle’s interior. Manufacturers must conduct these tests to demonstrate that their vehicles meet the required standards. The regulation also includes provisions for the durability and reliability of these components to ensure they function correctly over the vehicle’s lifetime.


    The TAT Lab in Iran is authorized to perform testing and certification for compliance with ECE Regulation No. 121. This includes conducting all necessary tests to ensure that vehicle controls, tell-tales, and indicators meet the specified standards for safety, performance, and usability. TAT Lab utilizes advanced testing equipment and methodologies to perform these tests accurately and efficiently. By performing these tests, TAT Lab helps enhance vehicle safety in Iran by ensuring that vehicles are equipped with controls and displays that are easy to use and provide clear information to drivers, thus promoting safer driving practices.