Autel IM608/IM508 can renew Mercedes BE aftermarket Key and WRITE the new Key File. Here is the BE key renew procedure with MaxiIM tools.
Insert BE key into IR hole of xp400 pro
select IMMO-> Mercedes-Benz->Expert Selection->Key->IR->Repair key
Read key information, key was programmed.
Select Renew BE key function and confirm to clear key
Clear the BE key successfully
Read key information again
Now the BE key was renewed and can be programmed to another Mercedes.