As others have said, get it scanned for fault codes anyone near you with vagcom can do this, it wont be definitive but itll give yu an idea, if its drinking fuel as Wazzer said temp sensor, also the lambda sensors can cause overfueling.
checkin for boost leaks is easy, boost leaks leak oil so look for any pipes with oil over them, most common ones are at the back of the intercooler and where the N249 and N112 valves are.
Where abouts are you as I am sure someone near could have a quick look if you're unsure