Filtering the air that the engine of your Mercedes M3 receives is one good way to increase its performance and ensure that it will be well protected against the possible action of contaminants. However, do not just settle for any filter out there. You have to rely on a part that has a treasured and reliable history, just like the air filter from the K&N brand. While your 1999-2001 Mercedes M3 can be considered top-of-the-line, the K&N Air Filter as well is considered one of the finest when it comes to filtration technology. As every performance driver out there most likely knows, the K&N brand is one manufacturer that you can rely on when it comes to automotive filtration. What makes the K33332703 K&N Air Filter click compared to other air filters? The filters from this brand consist of six sheets of cotton gauze which are layered between two sheets of aluminum wire mesh. This media is then pleated and oiled to enhance filtering capabilities and overall performance. The K&N Air Filter that you can find here in our site is created for an environment requiring maximum horsepower and enhanced acceleration in addition to protection from dirt and dust of off-road travel and racing. The end result is dramatically more air to the engine and better engine performance. If this is what you are looking for, settle for the K&N Air Filter and get it here.