This scenario requires you to drive through the streets of Tarchomin, most of them have the names starting with M. Why those? Because I've got a lot of problems remembering, which one is which. Simply, all starts with M ;)
Please note that you have time limit, so you need to be quick, but you shouldn't drive above limit, because you'll be punished for that.
The scenario can be downloaded from here. After accomplishing the mission look for final coordinates and comletion code in your inventory.