The navigation,audio control is much worst than fussy. Some British engr. must work real hard to make this hard to use. e.g.AM/FM change takes 3 buttons push. You need to select "audio" menu ,small"+" sign. Most radio can do it in one push.
"zoom in"/"zoom out" need bar pop up in 1/3 of screen. Block some map. select + or -, than remove the bar. Most GPS simply put 2 small button on corner of map.
Volume control will blank screen show a level change for about 4 seconds. All other information will not be visible during this time.
separate left and right temperature control.
All volume, fan speed controls should not blank out display. The bar can overlay on bottom of screen so driver can still see the map or other information.
"+" and "-" button for zooming control.
faster drag on map. Not the 8 direction buttons with sluggish response.