THIS IS A OEM BOSE FACTORY SUBWOOFER THAT CAME OUT OF  A 2004 MERCEDES BENZ SL500 THIS SUBWOOFER WORK'S AND SOUND'S GOOD THERE IS NO CRACK'S ON THE BOX  THE AMP MOUDLE WILL ALSO COME WITH THE SUBWOOFER THIS SUBWOOFER IS LOCATED UNDER THE LEFT COVER IN THE BACK SEAT  SO ALL YOU HAVE TO DO IS PLUG IT IN THIS WILL FIT MERCEDES BENZ FROM 2002 - 2008 SL500