Greg Holloway made a car navigation system based on Raspberry Pi and 7 inch screen that is held by 3d printed dashboard structure. It was printed on E3D BigBox machine with the help of SpoolWorks scaffold soluble support material.
The car is Suzuki Jimny. Software used is open source Navit.
Detailed step-by-step construction guide can be found at:
Thingiverse page for the files: