If you want to learn, buy a proper service manual and read about how your engine actually works. Unless you understand that, all the tools and advice in the world won't help you.

Every problem is different - anecdotes can only get you so far. You've obviously got a problem that is not the "quick fix" type, so it's time to spend some money.

And FYI - there are help lines for techs, too, and the guys on the other end of the line aren't that reliable.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.