Talking about "lane assist" on a German Autobahn - I had a bad, if not worse anecdote with a French (the model) rental car one or two years ago. I did not know that assistant was on, but had I known I would have thought nothing of it.

Because what happened really surprised me: Entering a construction zone the assistant took the wheel away from me(!!!). I was steering manually, normally, but the assistant insisted I follow the previous line in the road, that lead right into the construction zone. Which was behind a concrete divider.

I actually had to fight the "assistant", with not insignificant use of force on the wheel, to not crash sideways into that divider wall.