The sump plug is located on the base of the engine, and is accessed underneath the car. You may need to remove the undertray. CAUTION! This is heavy, it must be fully supported when removed
Undo the fixings - use Torx-25 and Torx-30
Carefully remove the undertray and the sump plug is revealed
Do not forget to have a suitably sized receiving tray in place
With an oil catchment tray in position, use a 19mm spanner or socket to carefully remove the sump plug. Fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel and refit the sump plug and washer. Do not over tighten. Replace the undertray.