We have replaced the oil filter check valve, as in the bulletin, on two cars. The problem has yet to reoccur. It turned out that in both cases the updated part was already installed. Both cars had sat for some period before the problem occured. Both cars rattled for way more than a couple seconds. They were both towed in. Neither were 500Es. One was an 500SEL (1993) the other was a SL500 (a 95 or 96)

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician