1) Yep, voice control. If you do have the voice module it looks like a big heat sink in the radio module.
2) Yeah bit slow and clunky by today's standards, technology has moved on quite a bit in 13 years or so
3) Buttons can be swapped out. Part number is 4E0951527(letter); letter depends on what side and 3 or 4 spoke wheel and maybe tip controls.
