The B9 Audi S4 is an easy car to service when it comes to the engine filter. It shouldn't take more than a few minutes to swap yours with hand tools. The carbon air filter on the other hand was a bit of a pain just due to the cramped conditions. Overall give yourself at least 20 minutes for a first time swap of both filters. Once you are familiar with the process you'll be doing both in minutes.
Today it's time to swap the intake filter and cabin air filter in my 2019 GMC Sierra Denali Ultimate. This should also work for newer models and Chevrolet Silverado with the 6.2L engine. The process is quite simple and anyone with basic hand tools could do it in minutes not hours. No reason to get ripped off at the dealer :)!
Today I'm going to change up the spark plug and filter element of my 240SX S14 Zenki. This is the low miles (16K) stock 1996 that I picked up recently from Bring A Trailer. During the job I discovered the valve cover gasket is leaking around the spark plug wells.