A Facebook post from SCS Games announces that an open beta is now underway for a new version 1.21 patch for Euro Truck Simulator 2, which paves the way for new Cabin Accessories DLC to help you decorate your environment (thanks PC Gamer). This trailer offers a look at all the chatch this provides, and this prior blog post has details:

We are about to launch open beta of another Euro Truck Simulator 2 game update - version 1.21. This is mostly maintenance release, with hundreds upon hundreds of touch ups of the map, improvements in road and terrain collision detection, AI code optimizations and improvements, some tweaks to physics, UI, sounds, and more.

This update also paves the way for a new DLC - Cabin Accessories. It's a collection of practical as well as totally impractical things with which you can decorate the interior of your truck cabin. Showing you the video below is better than trying to describe it in words; all the accessories are physics-enabled...