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There is a PCV- it is located right on the front of the valve cover/top of head area, with a couple hoses coming off it. With the engine running, see if it is hard to remove the oil cap, and if the idle gets weird after you remove the oil cap
Do you see the PCV I am talking about?
Should look like this-
Though usually if it is bad, it will give you a rough idle.
You may also want to inspect the turbo bypass valve underneath on the passenger side, remove it from the pipe and see if it falls apart when you take it out, or has a tear in the diaphragm. There is an updated part that uses a sliding piston instead of a diaphragm seal.
DO you have any faults, check engine light on? Any whistling or "whizzing" when stepping down hard to spool up the turbo?
Most Sportwagens have the TDI engine, but if it has a 2.0, then it is the 2.0T.