SO I did some checking and looking and it seems one possibility is that the green vacuum modulator might need to be adjusted. It was listed as a cause of slipping in 3 and 4 gear. That would be an easy test. Any ideas on this being a possibility? I did put the upgraded K1 spring kit in the valve body when I had the pan off. Did not think any adjustments were necessary when you did that install but maybe I was wrong.

__________________
Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red