The sump plug is located on the base of the engine. It is accessed underneath the car
You may need to remove the undertray to access the sump plug
Undo the fixings - use Torx-25 and Torx-45 sockets
Carefully remove the undertray, Caution - it is heavy and must be properly supported
Don't forget to place a suitably sized receiving tray beneath
Using a 19mm 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 and refit a new sump plug and washer
Do not over tighten - replace the undertray