the e53 had two camera options, reverse, either with a switch as TQ said, or the TV module, and front, with a funky mirror/prism and funkier switch that looked totally out of place on the dash... the OE cameras looked ugly, and that camera does look like it OE - the complete OE reverse camera retrofit, with camera, cables, switch could run you an $800 back in time when E53 just hit the market...

i have a chinese camera with reference line - those lines are static, they don't move, they are ENGRAVED in picture - lowblock refers to the tracer lines that outline your INTENDED path, those do require special block...

i wonder what connector on the back look like...