The missus accidentally put diesel in the XE (4.1) the other day on her way
to work. The car was rescued the following morning after the task of
siphoning the tank to the last drop I could get out was complete (Why
couldn't it have a drain plug!!). Filled with 10 litres of petrol and I let
it sit there idling quite a while occasionally blipping the throttle until
most of the smog was no longer pouring out of the exhaust - at which point
it was carefully driven back home. It was making no more horrible a racket
than it usually does.

Is there anything I need to be particularly concerned about - or check?

Cheers,
-Dave.