The Abarth Stilo with the bigger 2.4 engine is clearly more cramped than other models.
The Battery box is very close to the cover over the bulbs so it is necessary to move it to get access. Some models may not need the Battery box moved so you may not need to do this on a model with a smaller engine.
The Battery box is very close to the cover over the bulbs so it is necessary to move it to get access. Some models may not need the Battery box moved so you may not need to do this on a model with a smaller engine.
Getting Started
Remove the wheel and plastic liner (6 screws. look for the one underneath at the back)

Remove battery

Move Battery box
Remove the two bolts under the battery.
The fuse panel needs to be moved and held by small screw. Pop it out of it's pivot and carefully move clear. Undo the rear bolt as shown.'

Manoeuvre the box up enough to clear the lamp cover.

Replace bulb
Remove cover. Clip on right and cover slides out.
Unplug bulb (the yellow wire one)
Squeeze wire retainer to remove bulb.

This is the replacement bulb I used. Avoid touching the glass of the bulb with your fingers. This can reduce the life of the bulb.

Reassemble taking care with fuse box wiring not to pinch or dislodge anything.