If it's any consolation engatwork, my oil pump chain tensioning rail hardly has a groove in it at 257k miles. This is of course on a 603 but I don't know if the 617's are different there or not. I would think mine would wear faster since MB takes short cuts with every model change.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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