My 2006 Audi A8L turned 105k last week and gave it a Tune Up. The car has been running quite well, but the oil was replaced 16k miles and the spark plugs at 50k miles ago.
I bought 8 NGK BKR6EIX Iridium spark plugs (this should last 60k miles), Mobil 1 0-40w (15k miles), Air filter and Oil filter to do the job.
I don’t feel like crawling under the car, remove the engine guard and get dirty, I bought the Mityvac 7400 evacuator and it works quite well. I’ve used it 3 times already with my other cars. To change the oil filter, the air cleaner enclosure needs to be removed and don’t forget to remove the Foglight grill to disconnect the tube of the air cleaner enclosure (important)
While the air cleaner housing is out, it’s clear to replace the spark plugs on the right side. The procedure is straight forward 5/8″ socket is needed. I taped the socket to the extension, put fresh engine oil on the spark threads, hand tighten and torque 14 ft-lb and 1/2 turn after it clicked, feel the ring compressed. The most important thing is to check the rubber sleeves on the coil packs, make sure they don’t get wrinkle due to forcing them in the wrong way. The bad one will sit higher than others and it doesn’t make good contact with the spark plug.
I checked all the fluids, brake, power steering, coolant and especially the timing belt. For the timing belt, 2 covers need to be removed. T30 torx wrench needed, 2 screws for each cover, left and right, be careful not to drop the screws, they’re in a tight place. The timing belt is recommended to be replaced at 75k miles, but since I’ve owned enough Audis, they do last longer than that, it’s just me, if it’s good, I don’t want to change. Watch the end of the spark plug video.