You may need to remove the sump cover / undertray
Undo the fixings - use a Torx-25 socket
Don't forget to have a suitably sized receiving tray in place
Using a 17mm spanner or socket, carefully remove the sump plug and 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