I've currently got a 2017 Sport with the 10.5" screen at the moment with the curved bottom corners. I've bought the non CD updated AC panel for the lower section and now looking at the options for the main screen itself.

I've noticed the two sizes above and see the 12.3 is the maximum OEM style look and the 13.3 over hangs and blocks both top vents and a portion of the top of the new AC buttons. In some pictures it does and doesn't so much but there's no adjustment on the screens.

I like airflow onto my face so with the 13 blocking I'm leaning to the oem. Aside from this any other differences, many people upgraded? I noticed many people saying need to wire into oem GPS wire etc but could see many complete DIY for the L494, I have the Harman style.

Thanks for your input guys!