Lexmark 302 - Manual (Page 169)

5. Push the ribbon guide toward the back of the printer and lift the
ribbon guide up.
Note: You may find it easier to remove the ribbon guide by
lifting the right side of the guide first and then pulling up the left
side of the guide.
R i b b o n G u i d e
6. Pull the ribbon cartridge up until it snaps free. Remove the
ribbon cartridge from the printer.
Note: You may find it easier to remove the ribbon cartridge by
lifting the right side of the cartridge first and then pulling up the
left side of the cartridge.
Chapter 3. Replacing Your Ribbon 3-3