Update: When I picked up the car from the workshop, they informed me that they had updated the firmware only and not replaced the backup battery as originally suggested. According to their information this update should likely resolve the problem. If not, next step would be the battery to be replaced.
With the replies from Clan in mind I'm confident the update will tackle the issue!
One would almost think this dealer is reading is reading the same thread :-)
BTW, this update was FoC.
W.
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