This is a TV canceler kit made by altporte auto. It was installed in a Mercedes Benz GLS400d. It was working normally until it was removed last May. ■ TV Canceler Allows you to watch TV and operate the navigation system while driving. You can switch the function on and off using the return key on the steering wheel controller. No external switch is needed, allowing for a clean installation. *This product is intended for passengers only. It is a violation of traffic laws for the driver to focus on the TV or navigation system. ■ Compatible Vehicles MBUX-equipped Mercedes-Benz A-Class (W177 V177) B-Class (W247) CLA (C118 X118) CLS (C257) AR navigation equipped E-Class (W213) AR navigation equipped GLA (H247) GLB (X247) GLC (X253 C253) Late GLE (W167 V167 C167) GLS (X167) EQA (H243) EQB (X243) EQC (N293) TV canceler. CLS and E-Class are only compatible with AR navigation equipped vehicles (models released after September 2020). By installing it on the back of the vehicle's navigation (MBUX) unit, you can watch TV, DVD (only on equipped vehicles), and operate the navigation system while driving. 【Product Contents】 This product includes an instruction manual and harness. - Brand: altporte auto - Accessories: Instruction manual - Cable type: Harness - Instruction manual language: Japanese - Connection terminals: Multiple wiring terminals - Package condition: Used, good condition - Product use: TV for car navigation It definitely worked in my environment, but I cannot guarantee the complete operation of the product due to the installation work. (I cannot determine damage due to incorrect installation, etc.) Also, I am not responsible for any serious problems that may occur in the MBUX system by using this product. (I used it for about a month, and I had no problems.) Based on the above, if you agree to take full responsibility, this is a good opportunity as it is priced lower than the market price for new products.