I've got a friend who works in the Mercedes-Benz dealership, and he can get me a really sweet deal on the factory backup camera from a 2009. My question is as follows: is the camera putting out a digital or analog signal? It's got 4 wires coming from the camera itself and it has a connector on the end that any auto manufacturer would use.

If I had to guess, the wires would be power, ground, and the other two be for the RCA connector should I make it have one... maybe I'm wrong.