00by I completely understand your original question. As others have said, mine too behaves how yours does. I couldn’t believe either that arguably the most time sensitive function can disable with so little fanfare.

I don’t use it for this reason - you can’t relax at all using it just in case it hands control back to you, so you might as well not use it at all. In fact I think I have to concentrate more when it is active, which is surely not the point.

Interested to know how you find the accompanying adaptive cruise control? I find it less good than on my previous three L405s - it seems to constantly accelerate then brake as though it can’t quite figure out how to be smooth. Most noticeable on gentle uphills where it is un-usable when following traffic. Passengers ask me to turn it off which is not great on a car built for luxury transport.

Exactly! Even a little bong would make it so much better to use. It does seem to be more reliable than when I first got the car, though I could just be getting used to it and predicting where it might struggle.

As for the ACC, I know what you mean from my experience in my previous car (2023 Discovery) - that too used to constantly surge with the traffic and change gears to accelerate then do it too much and...yes, not very pleasant.

I don't remember my L494 doing that, but it's been a few years since I had it. The wife's BMW was fantastic at it all, so smooth and effortless.

My MY25 L460 is acceptable - much, much better than the Discovery, but not perfect. I'm not sure if this is purely down to the new gearbox they put in these (it was a revision for the MY25 I think) making for smoother changes so it's less perceptible. I can use it without getting too annoyed, though!

Either way, plenty of tweaking still to do on these systems it seems.