Translates to :
Forward-facing sensor
Other error symptoms:
Message is missing
Module: Speed control module
So you were right, the Adaptive Radar sensor.
The pic above were from a guy in Germany that had his radar sensor fail mk4 mondeo, so he got another from a volvo but the part numbers were different and the system didn't like it, it didn't run hence missing message. He then got a matching part number ACC sensor and on fitting it went straight to learning mode and CC were working again.
Google tanslated
hope it helps perhaps remove the battery cable for a couple of minutes to see if the code clears?!?