My problem is that there is no way to turn Autosteer off without turning TACC all the way off as well. Turning TACC off abruptly activates full regeneration.
It doesn't actually. It activates a small amount of regeneration, which then after a couple of seconds ramps into full regeneration.
If you want to turn Autosteer off and retain TACC, you can override the steering, but that can be uncomfortable.
The other way is to simply push the stalk up and then down again, deactivating both and then immediately re-activating TACC. If you want that to be smooth - be ready with the accelerator to override any regeneration that might bother you.
It's a skill, but it's a skill worth developing while random "slow-downs" occur during any type of TACC operation - I'm learned to be ready at all times to override TACC with accelerator (with the caveat that TACC might actually be slowing down for a very good reason, so some care required, it might actually be saving someone's life for a change rather than just pissing you off).
I suppose I could also go into asking what are the scenarios when do you want to deactivate Autosteer and keep TACC? For me it is when I want go around a pothole on the freeway, or I am mistrusting what the traffic around me is doing (e.g. car moving uncomfortably close in the adjacent lane). Depending on the scenario, I will either just override steering (sudden event), or just push up on right stalk deactivating both, deal with the problem while modulating accelerator, and then re-engage both when conditions return to normal. It usually depends how much notice I get.
