Sorry for late reply. The spill free funnel kits are available everywhere. Example here...
http://www.ebay.com.au/itm/Spill-Free-Funnel-Coolant-Fluid-Spout-Kit-/142163606451?hash=item21199c7bb3:g:ttIAAOSwn7JYE9p R
I have followed nissannewbys advice on mine (identical cooling setup as the 3L CRD). After initial top up and bleeding just by idling idling the motor, they eventually rid them selves off air after a drive or two.
I tried using the funnel on mine recently @ the radiator. And it certainly helped with the initial bleed after filling the system up.
The park up the hill trick will only work so far on these due to the header tank design. Header tank is the highest point when car is on level ground. No need for uphill parks.
They are designed to self bleed. Fill up radiator and header tank to max. Fill overflow tank to between min and max and then run the motor till thermo opens. Go for a drive and monitor the coolant level... Top up if necessary. Just make sure the overflow coolant is present for the header tank to suck out of... Mine settled after about 24 hours or so...