Review on 🚗 SWTNVIN Android 10.0 Car Stereo for BMW 3 Series (E46) Rover75 MG ZT - 7" HD BT GPS TPMS Steering Wheel DVD by Peter Sullivan

help? I emailed the seller for help and watched all the YouTube videos, but I still can't connect my device to the power supply. They keep telling me to buy alternative suspension, but that's also wrong. I'm trying to install into a 2005 BMW 325CI with a stock BMW Business Radio/CD and no factory navigation or amplifier. So the standard square harness coupler works fine, but there is no power. I'm considering a wire-by-wire installation by cutting the ferrule off the wire harness. My local stereo store charges $200 for installation. I suppose there must be a way PLEASE HELP if you can JEV1A