On my 2.5SL with Tech, pressing the CAMERA button does change camera angles. When first shifting to R, I get the wide angle display with a pair red/yellow/green lines. When I press the button, it zooms in a little bit and I get the display with the red/yellow/green, plus the lines that curve as I turn the steering wheel.
The manual doesn't say too much about the CAMERA button, but page 3 of the Quick Reference Guide does say "With the shift lever in the R (REVERSE) position, press the CAMERA button 02 to change the camera to rear wide view 03." It also has pictures of the two views. The Quick Reference Guide does seem to be backwards from what my car does though--the guide says that it starts out in the close up view, and the button changes it to the wide view, but mine starts in the wide view, and the button changes it to close up.
In any case, you can show your dealer the pictures in the Quick Reference Guide.
Last edited by Quantum_Mech; 01-25-2013 at 11:37 PM.