content: This is an easy install on the 2004 Mercedes C240 4matic and should be similar on the other w203 chassis cars. Open the hood, pull up and forward on the front engine cover, lift the back engine cover, flip the back engine cover, unbolt the torx bolts, remove the old filters, clean the crud out of the area, insert new filters and reverse procedure to re-install. Been using Mann genuine German filters for decades. Great fit and quality.