I saw some Gs with colored guide lines on the screen rear view camera, but I do not have them - just 'Check surroundings for safety'..
Does anyone know how to activate these guide lines?

 

i don't know about other regions but US spec GS do not have the parking guidelines

 

Hmm.. I most likely saw European GS.

 

I get that message on the bottom of the screen when i put the car in reverse

 

Yeah, I kinda wish there were guide lines. I haven't really "gauged" the size of my car in the rear view screen, so I'm very cautious (still checking mirrors) when backing. I dig the Infinity setup... as you turn the wheel, the guide lines bend.

 

Me too.. guidelines would be nice. before I bouth my Lex, I test drove an Altima with the guidelines and it helped a lot.