Originally Posted by 70GT6
All fine and good but I removed 5 so I put 5 back on. is there a chance SRTs have 5?
Had your oil been changed previously by someone else? The engine in the SLK350 uses the same filter but has 5 o-rings. That is why there are 5 in the box. Maybe someone changed your oil before and saw the 5th o-ring so they stuck it next to the other one in the only place it would fit on the bayonet.