Södertälje is a city located in eastern Sweden, south of the country's capital Stockholm. It's introduced in Euro Truck Simulator 2: Scandinavia. It is notable for being the location of the truck-maker Scania's headquarters and factory.
Södertälje is next to a highway junction between the E4 and E20 highways. The complicated nature of the junction means that truckers have to pass through it at least ten times if they wish to unlock the "Pathfinder" achievement.