These SL 2.0's are to prehistoric to use the BT CAN service key.

All the adjustments are done with the 3 push buttons on the A5 card ( big silver card ) & also the Curtis hand held programer on the A1 card ( black traction box )

A5 card is in overall charge of the truck BUT that feeds certain information on to the A1 card which is basically in charge of traction & brake.

Ill email you the info.