So, you have fitted the fixing frame to the car and plugged it in. Time to code it in.
Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS.
Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up.
When you get to the main screen, press F2.
Scroll down to "smart" and press F3.