I have a 2002 a6 avant quattro. 142,000 miles

I have been doing the usual check ups on my car... so far so good. I just found out about battery drain problem and checked that out, fine there.

now I'm looking for the a/c fill port near the battery. on my car. both caps are black? I'm use to seeing one having a "L" on it or being green.

please let me know which one it is as if your standing straight infront of car. left or right?

thanks, so much

 

Hi, The fill port should be on the larger diamter or low pressure line.