EuroFlash is a tool from Eurocharged for flashing ECUs of Mercedes based cars. The tool can read out the car unique identifiers, such as the VIN.
The tool has support for Windows and Mac OS X, and requires the USB-to-OBD2 cable.
Documentation can be found here.
When using the tool on your laptop, make sure your laptop battery is charged! The Eurocharged tool tends to use a lot of CPU usage, so make sure your battery is charged before you go for a test drive.