2003 A6 C5 1.9TDI mystery loose pipe

[daveyboy1967]

I was having a nose around under the bonnet earlier and found a loose pipe (photos attached). I have no idea what it is or where it goes, it's got a braded cover and is situated near the turbo pipework. Can anybody help identifying this please? The car is running completely normally by the way.

Thanks in advance,

Dave

[daveyboy1967]

I forgot to say, it obviously looks like it's been deliberately blanked off by someone other than Audi but what is it and what purpose would blanking it off serve? I'm a little concerned I may be causing damage to the engine in the long term running it like this thanks to someone's half assed repair/mod.

[daveyboy1967]

After a lot of research tonight I'm thinking someone in the past has deleted the EGR valve, anyone able to confirm this may be the case?