The plastic line you are touching and the larger line that are wrapped together both go to the PTC valve on the intake tube I believe. They are part of the PCV system. The one to the right with the elbow I'm not sure, maybe its for your cruise control under the battery. The 2nd half of roberts PCV v...

As stated those are both lines that probably run to the turbo intake hose at the PTC nipple mid way between the air box and the turbo. The small black one I think connects there also but some of the turbo hoses have the connection by the PTC nipple and some higher up near the MAF. If these were disc...