2003 ML320, 2017 C300, 2009 Smart Car Brabus
I spoke with my mechanic the other and he gave me some confusing news. The other day I bought two K&N air filters for my 2000 E55. I dropped off my car to my mechanic to have a gasket resealed. I asked how to open to the open the area where the filters are stored. I explained that I got a good deal on the filter and he explained that he would NOT recommend using such filters. He explained that many of these after market filters give no increased performance, only corrupted air-mass-senor. Now, many people that experts in the high-performance field would disagree. My mechanic is a hardcore OEM. What do you guys think?