Audi sold the RS4 in the US for just two model years, 2007 and 2008, and pricing is highly dependent on condition and mileage. Most of these cars have been driven well over 70,000 miles by now and Two common ways of treating carbon build-up are: Using an abrasive. For example, ground walnut shells. Using chemicals. Question your mechanic on which method is better. Our mechanics at Foreign Affairs Motorsport in Pompano Beach are specialists in German cars, Audi included, and automatically revert to what the manufacturer recommends, giving Join for Ratings and Reviews. Audi's high-performance AWD version of the outgoing A4 sedan uses the supercharged 3.0-liter six-cylinder. A six-speed manual transmission is standard and a seven S4 is not particularly finicky — it is typical. Audi recommends in B9 S4 Owner's Manual to follow break-in procedure strictly for first 600 miles, then gradually open up as you reach 1000 miles. Don't worry, car is still fun under 4k RPM and 50% throttle. Interior and comfort goes to the S4. The S4 is still quick, but the extra weight and size is noticeable and translates to less sharp handling than the S3. If comfort and daily driveability is your #1 priority and weekend fun is a bonus, go with an S4. If you want more fun all the time and can live without the extra comfort, the S3 would be just The A3 sedan has been a surprise hit for Audi since it was introduced here, and the A4 that has been shrunk in the dryer is readily found on the used market, with 3-year-old cars coming off lease However, the most worrying problem with the Audi e-Tron is that moisture can enter the high voltage system of the vehicle through a faulty seal on the charging socket, causing a short circuit. 5. Audi Q5 Source: Nhadatvideo / Flickr. For several years, luxurious crossovers like the Audi Q5 were global bestsellers, outselling more traditional Surprisingly, it was planned as a small-volume engine for high-performance compact S4s and S5s. Now it is Audi's only V-6 available in midrange A6s and A7s, the flagship A8 sedan and Q5, SQ5 Welcome to myAudi. The availability of services may vary, depending on the country, model, and equipment. Audi connect is a prerequisite to using some services. Learn more about Audi Roadside Assistance, available 24-hours a day should you ever need a jump start, emergency towing, or help with a flat tire. I’m looking to purchase a used Audi S4. 12,000 miles at $40,500 dealer tag. You didn't mention year but with 12,000 miles I am guessing it is a B8.5 in which eL9i.