No idea what this is, but if it's normal car radio format they usually require a pair of flat metal keys to release the internal anti-theft catches. With these inserted each side the unit is free to pull out. Maybe they're hidden in a safe place??
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
