Open MW_Marker_Editor.exe . Click "File" > "Open." Navigate to your CARS_UNPACKED folder. You will see a list of every single marker in the game.
: While primarily used to add new cars, this tool works in tandem with other mods to ensure that your "all-marker" selections don't crash the game when dealing with extra data. How to Use the Marker Editor (Extra Options) nfs mw marker editor free
This is the most powerful "all-in-one" tool for modifying game behavior on PC. Open MW_Marker_Editor