o ring

2003 CL500 Okay I have read countless posts and stuff about the ABC system and just need a couple questions answered about my problem On my way home from a friends house I got the abc warning drive careful light not knowing that my fluid had leaked out due to a leak I proceeded to drive home...

Hi , help please ! I have changed oil and filter on my 2003 1.8 c class coupe , now I have a oil leak around the base of the plastic cap which holds the filter . I did not over tighten as the O ring seems to pop out the side a bit .the O ring is new also . I am losing about a half litre a day...