Highline and midline is the dash display basically.
If, when your ignition is switched on, you get all the engine lights in the center of the instruments its a Midline.
If when your igntition is on (or off), and you have a door open, and you see a picture with a car with the specific door open which opens and closes as you do it, then its Highline
MFSW is a Multi Function steering wheel - buttons either side so you can control Audio, Navigation, Volume etc
Yes, providing its enabled. You need to have the mirror turned to the L position and ensure it is activated to dip on reverse in the higline settings
The beeps get closer as you get closer to whatever you are reversing towards
Theres a great meet near Berkshire next week - Im going, and im just across from you in Poole