2004 S55 , 2005 S55 , 2004 S430
Yea I know how they function I just never heard of one rupturing the way yours did. I bet that got your attention. I wonder if the heat from exhaust was a factor, did you determine if it was a OEM unit or aftermarket ,maybe a quality control issue. Not like there are any brand markings on them anyway maybe a sticker if we are lucky.