Just traded in my 2006 Stilo Schumacher GP for a lovely red 2010 Abarth Punto Evo (same power - almost; 1 litre less; another 10 mpg on average; Road Tax £135 vs £460!!) just what's needed!
But ... help please, how does the shiny wheel-centre come off the 17" Claw type wheels to get at the wheel-nuts? There's no ention in the driver's handbook, presumably without a spare you're not supposed to need to know!

It is very difficult but there is a very small gap at on the edge of the red centre cap bit.

I use a very small flat head screwdriver and wrap it in kitchen roll. Then put it into the gap and slowly ease it off.

It took me around 30 mins to get off.

Also just to warn you they are quite fragile!!

Many thanks! Spoted the little gap on the red part, took the nearly biggest flat screwdriver and out it popped then did a bit more either side and off it came. I know these things are fragile, had a puncture on the M5 on the Stilo Schuey, first job was to break the plastic centre piece, in the rain! Had to raid the nearest fence to bash the wheel off the hub! However, the Stilo had the bicycle spare ... the APE only has goo and a low rent electric pump ... Grrr!

I used the screwdriver that comes with the car to remove the caps when needed.

Also, I highly recommend getting a spare wheel. I got a 16" one with a nice "green"/energy efficient tyre for a low price.
And yes, I know it won't fit over the front brakes But in that case I simply take the rear one, put it in the front, and the spare one in the rear. It's quite a lot to do, but it's better than nothing I think.