I was able to look up the MB factory manual online and they talk about checking/adjusting the dwell. Without the use of a O-scope, how does one check the dwell? The spec says it should be 30 degs.

97SL320, will adjusting the points affect the dwell angle?

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member