I'm looking to buy a 2005 mk4 Jetta TDI 5 spd. It has the p2564 code. It looks a bit wet around the lower part of the engine and trans. The splash shield is a little wet at the seams. There seems to be a missing plug on top of the trans with a double hole I can see the flywheel. The coolant sensor plug is dry. Engine oil seems clean. I take the filler cap off and it's splashing and smoking out the filler. The filler cap seems to be leaking a little. The a/c does not work. It runs and drives fine and rattles like I would expect a diesel to. It's a manual trans. I know little about tdi's.