[Ari]

For the record and for others that may face the same issue: I replaced the auxiliary battery and it solved the steering issue.

Error codes I got were:
4823F1
218301

The mesage on the screen:
“Increased steering effort”

Syptoms:
When steering maximum to the left of right while not driving or very slow driving above message poped up. You could feel a bit harder steering for a sec but otherwise normal.

Dealer wanted to run extensive diagnostics and said they did not got errors on the aux battery. They said they might need to replace the steering house! I will feed back my conclusions to them. Also they said they did not have much experience with Integrated Active Steering vehicles.

Still unsure if it needs registration, they claim it does but the aux battery seems to be in serial with the main battery…