I read another post ("duty cycle stuck at 10%) and the diagnosis was a bad airflow meter.

The reading I am seeing is around 10%. Reading is for the most part stuck on 10%, but sometimes there is fluctuation. I am unable to change the % by adjusting the mixture screw.

KOEO=69.9%
During warm up=10%

What thinks the forum?

__________________
'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