Driving mode won't have anything to do it. I'm ok when driving on M25 clockwise, becase car has no problem with speed limit signs and all the way to work behaves ok. But when I'm on the same stretch of M25 but anti-clockwise, there's a few spots when it thinks it's in Europe and misbahaves. And when I go anti-clockwise from my home, all the hell break loose, because no proper signs when joining motorway.
Interestingly, I did the same route twice J6 M25 to A21 exit for Tunbridge Wells,. On my first drive, car switched couple of times between 70 and 110 on M25 and A21. A few days day later, it switched from first 110 to 70 and stayed that way. And in Tunbridge Wells, where it previously discovered 40-60-40-60, on second drive it was 40-60-30-40. Where the 30 came from on the second run? It's 40 on that stretch of the road, it doesn't change to 60 or 30.
Anyway, I solved the problem of undertaking prevention and posted it in OBD Eleven thread https://www.seatcupra.net/forums/threads/obd-eleven.465537/post-4979594 Now factory can think about it as long as they like.
Interestingly, I did the same route twice J6 M25 to A21 exit for Tunbridge Wells,. On my first drive, car switched couple of times between 70 and 110 on M25 and A21. A few days day later, it switched from first 110 to 70 and stayed that way. And in Tunbridge Wells, where it previously discovered 40-60-40-60, on second drive it was 40-60-30-40. Where the 30 came from on the second run? It's 40 on that stretch of the road, it doesn't change to 60 or 30.
Anyway, I solved the problem of undertaking prevention and posted it in OBD Eleven thread https://www.seatcupra.net/forums/threads/obd-eleven.465537/post-4979594 Now factory can think about it as long as they like.
, just read your posts. My trip back was the exact opposite with ACC continually intervening whilst overtaking legally, very frustrating!! I'm defo going to be buying the dongle 
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