Product Description 1.Stainless steel breather with o-ring to prevent loosening with vibration. 2.Direct installation. Any further modifications are not needed,it is more conveniently and easily. 3.Good sealing.(The oil will not penetrate easily) Fitment for MERCEDES-BENZ C230 1999-2000 2.3L MERCEDES-BENZ SLK230 1998-2000 2.3L Note .