That's what I thought. However, you can look at mixture "backwards" by reversing the leads. I'm going to try reading RPM (#1) just for fun.

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E