From Mr Burger 3 just keep following the Klongweg to the North. Apart from a few damages, the road has been well renovated and eventually reaches the Bypass about 100 m. Before the Bypass there is an option to drive to Cha-am via the rice fields.
After this you will undoubtedly get lost in the old village. Search and you will eventually find the railway crossing. You can cross this and arrive at the Cha-am market. There you feel like a world discoverer who has achieved his goal.
With thanks to Carla Wouterse