Need some pointers before I start reading a long thread on

"It's CRITICAL... how you set your transmission's vacuum system on your diesel MBZ.."

My 300D always shift rough between 1-2 and then delay shifting between 3-4 when the engine is cold, i.e. when I first use it in the morning after standing for the night. The outside temperature is not that cold, may be around 50-60 deg F.

After driving for a few miles or the engine is up to temperature then it shifts like silk. It does not make sense that a mechanical device like the tranny is so sensitive to temp or vacuum change ( due to temp ? )

Any idea is welcome.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.