A:Answer Hi sirtextsalot,
You have to manually press the car stereo. To display the picture from the rearview camera, press HOME. then select [Rear Camera]. See page 9 for details.
https://www.sony.com/electronics/support/res/manuals/4739/4ed1f2b2cedab10c67bfe2ef6fb3a02e/47393172M.pdf
Regards,
David