You will need to remove the undertray to access the the sump plug
Undo the undertray fixings, carefully remove the undertray. CAUTION - the undertray is heavy and must be fully supported during removal
Do not forget to have a suitably sized receiving tray in place
With an oil catchment tray in position, use a 6mm 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
Replace (new) sump plug and washer. Do not over tighten. Replace the undertray