[limoncello]

Originally Posted by tc4332

I have tried various dongly thingies, some good and some not so good.
I have a Bluetooth USB stick that can plug into these DVD players and the remote with it can be used to remotely control the player. Works rather well having tried it with various boxes. Big thing is that I don't have to wire an infra red eye into the car and point it's controller at the eye. It came with a DVD/TV add on player that I bought for the house some years back.
I plan on fitting (when I have enough pennies available) two back rest monitors, each with it's own DVD player. One will output to Aux 1, the other to Aux 2 as well as to each other. Aux Out will be wired to both of them. The ones I am looking at have two inputs and one output as well as the DVD direct to it's own screen.
This means that each RSE and the MMI will be able to see whatever the other screens are showing or three different things.
If my theory is correct

not exactly, if the dvds are integral to the headrest, that wiring setup wont allow what you want, as the selector is the mmi , ie if you select AV1 - that is what will output to AVout, likewise with AV2, the MMI front screen can see all by selecting each in turn. to output TV to the rear screens the mmi will need to be on TV. You can all see for example the left DVD player but only if you select it.

if you wire the av in and outs to each other ie from the headrest dvds each will be able to select what the other is watching, but you have used up your in and outs so then cant output or input from the tuner. or see it at the front
you could add a y connector to each and send this of to AV1 and 2. then you dont have enough inputs for avout so no tv.

but its not as easy as everyone picking what they want at any time.

read that back it sounds as clear as mud,

best to work out exactly what you need it to do

also dont forget you will need video in motion coded for the mmi to see anything while moving, this extends to AVout also so anything going through the tuner would not work without the vim