Hello forum members and techs. 2013 w166, m642.826 oil leaks. How many turbo's are leaking as well as oil feed seal at turbo and oil cooler leaking. these engines seem to have incredible blow by at various seals and oil cap. I do not have access to TSBs at the shop I am at. what a mess. they all eventually fail, just wanted opinions on what you see most. Thanks.

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1982 300 td. 268k
1984 300d .345k
1986 190e 2.3 16v
1988 190e 2.3
1989 190e 2.6
1991 300e
1984 318i