While the subject line mentions , that specific update focused primarily on:

Below is a technical overview and summary of the rework as it stands in the current game version:

New routes and content for the Iberian Peninsula.

The city's ring road was significantly enlarged to approximately 14 in-game kilometers .

New functional areas were added, such as a car factory , a chemical plant in the north, and the Messe Berlin (Trade Fair Grounds) in the south.

Introduction of chemical trailers as ownable assets.

The "Berlini átdolgozás" (Berlin rework) was the final stage of the Germany Rework project by SCS Software, aimed at bringing base-game cities up to modern graphical and architectural standards.