Audi seems to go out of their way to avoid warranty repairs. I have owned many brands of cars. Last was Mercedes. Mercedes was awesome. Fixed everything first time. Audi won't own up to issues. I have a 2014 Audi A8 4.0L. Love the car. At around 30K miles the ECP light came on and the engine started missing. Dealer says loose spark plug caused fouling on cylinder #3. Really? From the factory? Sounds improbable. Had full service, oil, new plugs all around. 3K miles later engine oil low comes on. Never happened before. Dealer claims normal for Audis to burn oil. Really? All of a sudden like that? Sounds improbable. Topped off oil at no charge. 5K miles later ECP light comes on and engine is misfiring again. Plugs #3 and #6 fouled this time. Dealer claims not using top tier fuel caused plug fouling. Come on! Showed me the tech bulletin. No mention of gas causing fouling. Does mention issues with fuel injectors and other stuff after many miles. Only 7K miles left on warranty now. Getting nervous about oil consumption and plug fouling. Go to an independent certified mechanic after 3K on new #3 cylinder plug. Ask him to remove and inspect. He pulls #3 and #1 plugs and states obvious signs of oil fouling. States #3 is <1000 miles from misfiring again. Took it to the Audi dealer with independent mechanic report in hand and ask for Audi to inspect the plugs. They refuse stating that it is not throwing error codes so Audi won't pay. I offer to pay them my self. $150 to remove #3 plug. Waiting for latest report from Audi and latest excuse. Having to pay for my own warranty investigations sucks. Avoid this dealer at all costs.