1. All units have been tested and are in normal working condition. 2. Designed according to specifications and performance requirements. 3. It has good quality and is easy to install. 4. It has stable performance and high reliability. 5. Product status: 6. Waterproof rating: IP 68 7. Operating voltage: DC 12V 8. Operating temperature: -40°C to +80°C 9. Shell material: Aviation aluminum 10. Adaptation type: Direct replacement 11. Part numbers: A1668203589 - A166 820 35 89, A 166 820 35 89 - A 1668203589, A2189009303 - A218 900 93 03, A 218 900 93 03 - A 2189009303 12. Compatible vehicle models: - Suitable for 2014 - 2016 A - W176 models - Suitable for 2014 - 2016 CLA - W117 models 13. Color: Silver + Black 14. Material: Metal 15. Package contents: - 1 control unit module 16. Only the above - mentioned package contents are included, and other items are not included. 17. Note: Light and different displays may cause slight differences between the color of the item and the actual object. The allowable measurement error is ±1 - 3 cm.