Chillan is a city in Chile.
Comming from Concepción, many people will let you out on the Ruta 5.
If the driver goes to Chillan, follow north with him as far as possible. As soon as he gets off the Ruta 5 get out of the car. There is a Toll station where you can leave the car easily. Walk back to the Ruta 5 to the bus stop. The cars go fast but some will stop. Bernhard waited no longer than 15 minutes.