Mr. CVE

I have the camera for my car, but my model does NOT have the analog TV tuner ( which has the extra inputs )
Surely there are other options.
I saw a seller in Germany that had a digital TV tuner for this model, but that has a USB input ( which my camera does not connect to, is yellow RCA lead )
I don't really care for the TV, but wouldn't say no to it, the camera is my main issue.

I am trying to look to see what is available.
I would rather not replace the complete radio system ( has everything cd stacker dvd and all ) with some aftermarket modern style unit.
I believe the Mercedes unit is pretty sophisticated.
I would rather support a sponsor or quality vendor.
open to any suggestions please.