Need hep with service for BT RRE

[grsergr]

Hello friends!

Please help us with a solution to our problem! 
The challenge before us is to make service (maintenance) of reach truck BT RRE160. The service messenge is lightening on the scoreboard. So what procedure we need to do to make this message disappears? 
Which set of equipment should we have? Did I understand correctly, that if we need to remove this service message we need to have a PC,  BT TruckCom TE 2.8 and CAN key is part number 7516708? I heard that there is a so-called "mouse" that is for removing warnings about the service. Does anyone know its part number?

Thanks!