Ensure you have Euro Truck Simulator 2 in your Steam library. You can purchase it from the Steam Store if you don't.
: If you need to "downgrade" to 1.37, you can usually find older stable versions under the Betas tab in the Steam game properties. Right-click Euro Truck Simulator 2 in your Library. Select Properties > Betas . Look for 1.37 - for incompatible mods in the dropdown menu. Euro Truck Simulator 2 1.37 Download
A highly anticipated feature enabled by FMOD, allowing players to hear the difference between a quiet, insulated cabin and the roaring noise of traffic when windows are rolled down. Ensure you have Euro Truck Simulator 2 in your Steam library
An alternate camera mode in the service and vehicle browser allows players to "walk" around their truck to inspect customization details up close. Right-click Euro Truck Simulator 2 in your Library
If you own the standalone retail version: