Thanks for documenting the deep-dive down the rabbit hole of "black death". (Perhaps this form of 'death' isn't to be feared as much as previously thought?) Job well done, and much appreciated!

I've been chomping on the bit about getting a CDI for the last few years. "Black Death" being one of my primary concerns. This helps allay those concerns and may just push me to further rationalize my "need" for another car. (Which I need like I need another hole in my head.)

One question:
Did you closely inspect the conical seal face for any evidence of erosion from the escaping gasses? IIRC, re-facing the seats is sometimes required. IF you had run up against that, what was going to be your plan of attack?

Thanks RollGuy!

__________________
Current rolling stock:
2001 E55 183,000+ Newest member of the fleet.
2002 E320 83,000 - The "cream-puff"!
1992 500E 217,000+
1995 E300D 412,000+
1998 E300D 155,000+
2001 E320 227,000+
2001 E320 Wagon, 177,000+

Prior MBZ’s:
1952 220 Cab A
1966 300SE
1971 280SE
1973 350SLC (euro)
1980 450SLC
1980 450SLC (#2)
1978 450SLC 5.0
1984 300D ~243,000 & fondly remembered
1993 500E - sorely missed.
1975 VW Scirocco w/ slightly de-tuned Super-Vee engine - Sold after 30+ years.