Hi Mike
I replaced all the badges on my Avant Black Edition to black. The front badge is held on by plastic clips. Start at the bottom with a thin screwdriver or a trim kit and work your way round. It pings off eventually. Accurately measure it as they vary from year to year. The side and rear badges fishing line and evostick remover to clean up with. I bought all the badges from Ebay for around £25.
Tony