On an E90 high cluster there is an analog dial that shows the current set speed of the cruise control. I beleive 544 is only used on high clusters with this dial and so the message for the speed display is removed.
I flashed to the latest Kombi firmware as I was not on the latest, in the hope that it would allow the speed display to work, or without having to manually code ACC_AUSSTATTUNG to wert_03 to get $544 to work. No luck unfortunately.
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