As from the latest version of Porsche connect Version 4.3.1 we can now plan a route with stopovers from your Porsche connect app. just use the edit function, add a stop over, save, send to car.
Example of a drive from Cardiff to the Porsche Club with a stopover at Tewkesbury
Example of a drive from Cardiff to the Porsche Club with a stopover at Tewkesbury