Ok so far in Switzerland it is better to stay on the big roads. We used the USB Navigation and it took us to a closed bridge when we tried to enter from Austria. We also ran into a very diifficult situation using our Iphone Maps. We were attemtping to go from the Furka Pass and Grimsel Pass to Engelberg (Mt. Titlis) and it took us through a back road with a toll. 6 miles later we were bottomed out on a very narrow dirt road on a ledge with a beautiful lake a couple feet down. We had to reverse down the edge of the ledge a couple miles to find a spot where we can make a 3-point turn and get out of there. The undercarriage probably has some bruises from this experience but we are just happy we made it out of there. This also left all four wheels covered in mud as well as mud along both sides of the car. Luckily found a wash station outside of Interlaken's train station and got it rinsed off
All in all its been an amazing experience so far as we are heading up to First Mountain today in Grindewald!