What does the manual say?

Normally parking any car is neutral is not a problem.  I have a Stilo Abarth
with a Selespeed (semi automatic like the Dualogic) gearbox and if I park
the car, select neutral and turn the engine off a warning alram is sounded.
This is normal.  Good driving practice is to where possible always park a
vehicle in gear to protect against handbrake failure.   Correded handbrake
cables breaking when parked happens far more frequently than people think or
ever could think would happen.

Nick /////

You can leave it in neutral but you are trusting the handbrake.

Better to leave it in 1st on Reverse depending on the slope. Think of it
like a convential automatic where you leave it in "park"

But as you no doubt realise the dualogic gives you the best of both an