Instructions:
Click on each part to download the map (Modsbase)
When done, go to your download folder and unpack each file with WinRAR or 7zip
Copy or cut the unpacked *.scs files into your Euro Truck Simulator 2 Mod folder.
Start the game, and for the best way is that you create a new profile with the Mario Map.
While creating a profile, activate first all parts, start with 1 at the bottom of the list to 9 on top.
Enjoy the Big Combo Mario Map.

Part 1
ETS_2_Base_01_1.46
Part 2
ETS_2_Base_02_1.46
Part 3
ETS_2_Base_03_1.46
Part 4
ETS_2_Base_04_1.46
Part 5
ETS_2_Base_05_1.46
Part 6
ETS_2_Map_Basic_1.46
Part 7
ETS_2_Map_Morozov_Express_1.46
Part 8
ETS_2_Map_North_America_1.46
Part 9
ETS_2_Map_South_America_1.46