Start by saying I like the looks and feel of this smaller light weight unit, probably the future of coming radio's. Like it or not the ON / Off switch is inside the steering wheel, I prefer it there.
The problem is on my 1st battery, the on off switch began to glitch and then totally fail, when using the steering.
Turns out there is a red & black wire attached to the switch that must work freely with the wheel. There also are the two guide tabs that are supposed to assist the wire movement and placement. Well the right one actually did the opposite and bound my red wire, finely pulling loose at the solder point on the switch.

FIX: I first soldered the wire back (good luck finding shrink wrap that small) & removed bout 3/8" from right tab, so far no problems.