The TV button, when pressed, selects a next available channel in the channel line-up... it does so sequentially, you press the button and it jumps to next avaialble channel... in absence of any channels, the only choice that you have is the AV input. The TV button just grounds the pin 9 of the white plug of the TV module to do so, no complicated electronics involved...

the TV Switch (S228) can not be incorporated into the central console Switching Centre (A169), and the A169 is an integral unit, with different part numbers for different options in the car. The S228 will however just snap into the one of the 4 slots in the rear of the center console - there are 4 slots, 2 for rear seat heaters, one for the AV module and one for the TV module...

you can rig up the TV switch up at the front but i am not sure if it will look good or OE...

TV switch - 61 31 8 368 345
connector - 61 13 8 373 666
shroud for connector - 61 13 8 373 662

AV module - 61 31 8 368 346
connector - 61 13 6 909 008


i use pins from Digi-Key, part # A28327-ND,
you can use OE - 61130005197 or 61130006663 - both parts come with pre-crimped wires.

TV switch pinout

pin 2 - goes to pin 5 on connector X322 from the radio
pin 6 - goes to pin 9 on connector X18806 on TV module

pin 4 - ground
pin 5 - ground


pinout for the connector x18806, white plug on the TV module

pin 13 - reverse camera (+)
pin 14 - reverse camera (-)

pin 1 - audio out
pin 2 - TV out
pin 10 - ground
pin 4 - audio in
pin 11 - ground
pin 6 - TV in
pin 5 - ground
pin 15 - ground
pin 9 - to pin 6 of TV search button