[panos]

does anyone know how to adjust the handbrake on a 03 mas coupe
it rolls back on a hill

Sooner or leter you will discover that Maser's Handbrake is more similar to a hand-job (total crap) if you know what i mean.
BTW, if you still insist, remove rear wheels and you will discover a small hole surrounded by bolts and screws on the caliper's drum.
inside the hole there is a gearwheel (part no 32 in the drawing).
use a straight (5-6 mm) screwdriver to roll this gearwheel upwards.
try roll the brake caliper if it does wind up a bit more until you cannot roll it anymore.
Reverse the gearwheel's winding until the caliper rolls free again.
place the wheel back and you're done.
Hope this helps
PaNoS

 

[panos]

The procedure is pretty much like any other car. While not Maserati specific instruction, usually the handbrake is adjusted such that it clicks 3 times before being fully engaged when pulled up.

The above description covers it pretty well. Where Panos said "roll the caliper", I believe he meant to say "spin the rotor". The caliper does not move. That is, tighten the star adjuster until the rotor won't turn, then back off a bit.

Excuse my English
But you are totally right!!!
That's exactly what i mean