Whoo-hoo! Found the EDS. Looks like my mother-in-law had randomly put away the box with it and some other parts during a cleanup while she was visiting... Found it under some clothes and photos in the spare room. Sigh. Well, at least it is found now.

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1976 240D [W115.117/616.916] (acq 11Jun76)
1990 MB 300D 2.5 Turbo [W124.128/602.962] (acq 4Sep15)
1991 SL250d (ex-300SL-24) [R129.061/OM602.962/722.6, was M104.981] (acq 25May12, converted to diesel)
1993 Jeep Cherokee [XJ] (acq 12Apr14)
1999 SLK23 AMG Sport [R170.447] (acq 12May21 **FOR SALE**)
2008 E320 CDI [W211.022/642.920] (acq 27Jan24)

-- Deceased...
1993 300D 2.5 Turbo [W124.128/602.962] (totaled by Dominos driver 28Mar12)
2007 E320 CDI [W211.022/642.920] (totaled 18Dec23)