i decided to give up and take my car somewhere for diagnosis. 15-19 degrees of chain stretch. the tech was nice enough to take me back and with the help of another guy showed me the pointer on the crank and how at zero moving it backwards didn't start moving the cam sproket until about 16 degrees.

any good sources for write ups on this repair?

also, what's a good price to expect to pay? they charge $103 an hour.

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'92 300D 2.5
'99 E300TD