Thanks, an additional useful thread.

And yes, a 606 would be ideal, but

a) I already have a near-pristine 602 on hand from my w124 that got wrecked by a Domino's Pizza driver (all body damage, no mechanical) -- had just replaced the timing chain, and had owned and maintained it for the previous seven years, so it is known to be solid (and "free")

b) with a 606 I would have a lot more electronics to deal with, or else convert down 603 mechanical parts which would lose much of the benefit of the 606 I think

__________________
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)
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)