[EulessDave]

VW Touareg 2006 2.5 TDI
Having removed the plastic engine under tray I'm uncertain which is the engine oil drain plug.
Can anyone help?

In this video he gets to the plug at the 3:20 mark and you can see where its located and what it looks like.

It's a 19 mm bolt - use the right wrench or socket, take your time, replace the crush washer with a new one, and BE CAREFULL NOT TO CROSS THREAD WHEN REPLACING!