Will this fit in a grande punto and will the buttons show as volume and skip which are on the steering wheel still work? Im looking at replacing my Blaukpunkt with this.

http://www.sony.co.uk/product/ica-in-car-usb-and-made-for-ipod/cdx-gt33u

Will fit, but you will have to buy a faceplate adaptor.

Don't think you can make the steering controls work with this model.

(Can't see a remote out option)

may aswell list this here too, http://www.pioneer.eu/uk/products/25/121/61/DEH-P4100SD/index.html will this work with the steering wheel?

Sony wont, pioneer might.