We found a 2018 Expedition Limited that we are considering purchasing but it does not have the DVD headrests. My dealer says he can add it after the fact but I'm concerned the sound would go through an FM modulator as opposed to being directly connected to the car's stereo. Since the new expedition has the EVO by developer VOXXHirschmann Corp I can't seem to verify if dealer added headrests are the same sound quality. Does anyone know?
I was in the same situation. I was promised it would all work out, yadda, yadda, yadda. (I didn't want FM modulated and I didn't want to buy multiple ipads, keep them charged and keep track of them. Plus, I would have very little control over what the kids were doing on them while we were driving. Additionally, if they had a problem, I couldn't help. )
I emailed Voxx and here was their reply (11/30/17):
The system that is being offered and installed in the 2018 Ford Expeditions will only be available as a factory installed option, there unfortunately will not be a version available at this time for after sales.
The Entertainment System does come equipped with 2 wireless headphones for listening so that others in the vehicle can still listen to the radio station of their choice.
We decided to purchase one with the factory installed headrest. I know it will work and I can control it through from the nav/screen. "You're fighting? No movie." (Yeah, I'm mean that way.)