Stueymit

Hiya thanks so much for getting back to me, I'll have a look later on, hopefully an easy fix at least. Cheers Stuart.

I filled the car up today (2011 audi a4 avant quattro) and later on I've noticed a big leak coming from the fuel sender unit to down in front if the rear wheel, the unit was changed recently but I have noticed that there is a third hole on top of the unit? Is this the wrong unit or is there supposed to be a plug in on the spare outlet to cover the hole? Any help would be much appreciated. TIA