My 09 A4 Avant just passed 50K miles and I need to do a tune-up. What spark plug should I use? I want to use OEM plugs, but not sure what brand/model they are. Should I just go to a dealer and get them or is there a better way?

Also are there anything else that need to be done besides changing spark plugs at 50K mark? Should I replace the transmission oil as well?

 

there are alot of snake oil plugs out there that have alot of claims. they're all crap. stick with OEM plugs from the dealer.