Hi
few things should be clear:
uploaded.net is very fast. You can buy access for one day for about 50 cents.
Password is piotrscs
It is copy of NEW never used SD card with new maps. It is normal that it wont be working with another SD (another CID: [Only registered and activated users can see links. ]).
But *.unl files are similar like in older Garmin devices: you can use file with locked maps by generate *.unl file. To generate unl file for older devices we need System ID and Map ID. System ID you can read from Mercedes-Benz radio unit. But I don't know how to read MapID from map file. And don't know if old generator will work for those maps.