One of the members wrote about his repair process. DieselDog?

Since he's 'been there, done that', try using the Search feature for 'Kingpin'.

Not to blow you off, but very few members have done this repair.
Just removing the coil spring can be fatal, without using the Mercedes Coil Spring Compressor.

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old