Review on 🌬️ Mann Filter C 3397 Air Filter Element: Superior Performance for Cleaner Air by Michael Maes

The filter fits perfectly on the M157 engine in the 2014 E63. Changing the filters on each side takes about 5 minutes. All you need is a flathead screwdriver and a torx bit. The filter box is mostly held in place with friction lugs, making it ridiculously easy to make yourself. Once you do this, you will never pay the retailer (or your independent business) for it. Unless you're happy to spend hundreds of dollars for no reason. Disconnect the two inlet and outlet hoses from the airbox. The inlet is just a plastic hose that you remove with little effort. There is a ring clip on the outlet that holds a rubber strip which is loosened with a flathead screwdriver and then pulled back.2. Pull the airbox up and out. 3. Remove the 4 Torx4 screws. Open the filter box, remove the old filter and clean the dust inside, and then replace it with a new one.5. Reverse the steps to replace the filter box, then do it on the other side.