Thanks; so when I look at the W124 alignment specs and see caster listed at just over 10 degrees, that's assumed to be negative? I think mine measured at just under 10 degrees (9.7 or so as I recall) after my last alignment, and I am having centering issues. I have tried loosening the steering box already, and while there is now more play, it still doesn't self-center.

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)