since most of us are suffering from this error due to battery drain or actual malfunction. it is better to code it and remove the error.
Disable Backup Battery
ATM 1F61
3001 ON_Board /BUB_FITTED (to nicht_aktiv)
Sometimes, it is enough to code the first one only.
Disable emergency call
KOMBI
3004 st_ecal_alive to (nicht_aktiv)
3004 st_ecal_timeout to (nicht_aktiv)
Hope this helps.