I was busy fixing up stuff in my E300D like the idle control issue, condenser fan resistor, blower motor etc..

I joined the red vacuum line that leads to the right fender to the vacuum system, it was previously cut by the PO and I then had blocked off the cut vacuum line to prevent leaks, I joined the line, with a piece of rubber vacuum tubing and new clear MB plastic vacuum line. The shift behaviour has improved dramatically over the entire range, the HVAC system is also faster to respond.

I dont know how much the idle control issue resolved this but I believe the shift quality has improved

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

That can only help. Those tranny's just don't seem to be as robust as earlier flavors. And that OM606 works best when you are shifting correctly. Such a smooth combo!!

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

When you say improved do you mean firmer or softer shifts

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1993 S 500 (Wolfgang)
1992 500 SL(Jurgen)
1995 E 300 Diesel (Dieter)

by improved I mean the cold shifts are softer now and the warm temperature shifts are very torquey, they were slightly sloppy before - and the sloppiness was noted specially when the transmission shifted from 2-3

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)