I don't have the car yet, BUT I was given the owners' manual to read!
So, for those who have this model, if you read chapter 7, you find most answers you need about SI-drive and DCCD modes and the use of the lock and also the noise it WILL make if left on lock when used on hard tarmac and finally that once put on manual control, it needs to be readjusted every time the engine turns on, because the system DOES NOT default to auto
phew, I think that's it...