First off, im new here, so HI.

I have a 2005 A4 1.8t ultra sport with 100K on the OD, and i love it. Handling, snow, rain its just a fun car to drive. but lately it seems iv been having some issues that just hit me all at once.

1) Check engine light. It gave me a p0300 code. random or multiple misfire. Had the MAF, intake bellows , crankcase vent valve replaced. Car runs more smoother now but the check engine light is still on. Haven't tested the coil pack but my mechanic is insistent that its a vacuum leak somewhere.

2) Oil dripping from somewhere. Ever since i had my check engine light looked at, there seems to be a very small amount of oil present just underneath passenger side wheel between the oil pan and the transmission. I am not low on oil either. I cant seem to pinpoint where its coming from but over night there are a few drops of oil present on the ground.

3) Low oil pressure warning message. Probably a sensor??

4) A/C doesnt blow cold air. Im guessing its either a freon leak or bad compressor?

Any suggestions on these problems before i take it in? And since im at 100k on the OD is it worth keeping?

 

Anytime there is a misfire first look at the coilpacks. They are usually the problem. You need to be worried about the oil pressure. Research sludge.

Has your timing belt been done?

 

Chekc ur vac lines feel around and see if u hear any hissing noises or air coming outta the hoses. They tend to corride after sometime.