Never had the highline display in my car, but dont think you will be able to see whos calling, u will just have to do the unthinkable and look at the parrots display to find out whos calling (what a farse eh
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as for using the MFSW controls, I am sure you can get an adaptor that enables you to do this, if u look on parrots website u will prob find out more information on there.
to be honest it will prob cost more than the parrot itself, where I had my parrot, u could make calls easy enough with ur arm on the arm rest. so imo I would save my money.
dont take the above information as gospel, as I might be talkin rubbish about the highline, like i said I didnt have one so couldnt tell you.