[ElectRick]

B mode around town and ACC everywhere else providing the road is not too twisty.

 

[ElectRick]

You can use ACC in either D or B mode can’t you? Unless I’ve been missing something.

Yes, but it makes no difference as the ACC handles the regen as required to maintain distance to the car in front.

Noting I am in an e-Golf, but assume it would be the same on ID3.

 

[ElectRick]

So even if you are in D, in ACC the car will use regen (‘engine braking’) to slow you rather than applying the brakes...

Yes, this is certainly the case in my e-Golf.

(Maybe only if you are using ‘assisted D’ with intelligent regen?)..

E-Golf doesn't have this function so I assume not, can't comment on ID3 specifics having never driven one myself.