How to rewind re tension a lazy Mercedes seatbelt

New ford oem 01 02 03 ranger front seat belt buckle end right 3l5z1061202aaa this item can be shipped worldwide. NEW FORD OEM Front Seat Belt Buckle RIGHT 3L5Z1061202AAA 3L5Z-1061202-AAA. FITS 01 02 03 Ranger. This item is in the category eBay Motors\Parts & Accessories\Car & Truck Parts\Safety & Security\Seat Belts & Parts.