Off with the wheels.     Remove the bumper. This easily done by either removing the wheel liners to acccess the 3x10mm bolts or it can be done by just prising back the liner where the bumper and wing meet and unscrewing them. Undo the under tray along the front edge and remove the 6 plastic retaining clips along the top edge of the bumper. (There is a Guide for this proceedure)     First test fit. (Tip) mask off the front of the wings to protect from any damage especially if your wor