Listening to movies in a vehicle

[Avond]

Hello all. Random question here that I searched and didn't find an answer to. Apologies if I missed something relevant.

In the car, I like to listen to DVDs of some of my favorite movies and tv shows. I recently bought a new vehicle but the factory unit doesn't have the ability to play DVDs. I was wondering if there was a legal way to either rip the full audio track (I want dialogue, not just a soundtrack) and burn to an mp3 disc or purchase some kind of version that I could play from a regular disc. Again, not wanting to do something that isn't legal here, just wanting to listen to those discs without replacing the factory unit (at least at this point in time) if that's possible. Thanks for any ideas!