I have to say that the current heat is causing some surprises:
I have my V8 4.2 now for 2 months and since the beginning neither the BC nor the GRA worked. Unfortunately, I haven't had the time to get to the bottom of it. Now, my best man stood untouched for 5 days in the blazing sun - this morning at eight and - oh miracles - all BC-Funtions except the average swath. Worked flawlessly and also the cruise control performed its work for the first time. So I drove in a joyful direction to Frankfurt to get the daughter from her aunt - on the way back on the A5, limit 120, cruise control on 135 - suddenly the haunted one has an end - the car slows down and the BC displays freeze on the last stand

What could that have been? I was told in the forum that it could be on the blue/white cable on the radio for the GALA.