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2004 Mercedes-Benz S55 ///AMG, 2006 Mercedes-Benz E350
685 Posts
Discussion Starter #1
I had installed K&N filters in my S55 AMG exactly 6 months ago. I took them out yesterday and with only 4K miles of city and highway driving(no dirt, rain or snow), they were quite dirty. I used the K&N cleaning solution, oil(kit cost was $19) and reinstalled them.

The performance gain and engine sound after cleaning/oiling was noticeable. The car feels like it is breathing more freely and that beautiful AMG engine sound is more pronounced.

I never thought with so few miles in a moderate driving environment, the filters would get so dirty. Anyway, if you have them clean them regularly for best performance.
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