unless you drive a car from the 50's with a steel dash, I don't see how it will attach itself to a plastic padded dash.
use some thick copper wire, solder two pieces, with a spreader/spacer in-between, together. bend to create a cradle and hooks at the top to go into a vent. I covered most of the wire with shrink tubing. have access to all buttons, lightweight and best of all was free.