If you want to play a DVD in your car’s CD player, there are a few things you need to know. First, make sure your DVD player is compatible with CD players. Second, find out the specifications of your car’s CD player. Third, consult your owner’s manual to find out how to change the disc. Fourth, follow the instructions in your owner’s manual. Fifth, be patient - it may take some trial and error to get the DVD playing correctly in your car CD player. ..