Leak, any ideas?

[diy_fun_uk]

Car's a 2008 Seat Leon FR TDi.

Noticed patch on drive couple of weeks back, roughly directly under where driver sits, that sort of area. Rain not budging it. Have been checking levels, all seems fine. Although no pic, windscreen washer level also fine.

Any ideas?

EDIT: Just been told it's likely the 'diesel cooler' that's leaking.

 

[Burnerman]

The diesel fuel cooler is indeed in that position. It's not particularly prone to corrosion but is prone to damage from stones or, god forbid, inappropriate jacking
John

 

[freddiemercurystwin]

Does it smell/feel like diesel?