Quick update, PCV was leaking oil around the diaphragm So I swapped it out yesterday.
I pulled the plugs today and had a look, nice and tan, but a light coating of carbon around the ground ring.
I think the dealer may have put the wrong plugs in. The part number on them is 06H 905 621 A. I can't find anywhere online that lists this plug as an option for a 2013 A4. 06H 905 601 A seems to be the proper oem part.
Can anyone weigh in on the difference between the two plugs? Heat range?
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