Thanx to Diesel Giant!!!! I was reading his page at http://dieselgiant.com/mercedes_diesel_maintenance_tips.htm
And he had some great info on the Vacuum Valve, the little black on box on your valve cover. I checked my vacuum valve levers and the top one was worn away, and the bottom one is close behind it. Ordered new levers from FastLane. Will let you know the outcome. Thanx again Diesel Giant !!!!!

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1984 300D Turbo Sedan (Hilda) 272,115 miles.....
Anthracite Gray/Palamino Leather, I am 3rd owner

2001 Dodge Stratus (Silver) (wifes) 55814 miles...

1982 280TE Wagon Astral Silver Metallic/
Anthracite Velour
260,512 miles (Eva)

1969 230 Sedan Olive Green/Black MBTex
4 Speed Manual
84,213 miles ????
Haus Frau


2004 Boreem Ninja Pocket Bike
Highly Modified 49cc (Ling Ling)

Einigkeit und Recht und Freiheit

That box is a frequent leak but the effect of its leak isn't that big on the shifting. If it is bleeding it off way to fast then it will cause harsher shifts but for the most part it shouldn't affect it all that much.

I contest his definition of this valve, "Transmission vacuum valve [...]." It is not there for transmission vacuum, it is there for the EGR valve. Yes it may minutely effect the shifting of the transmission but 90% of that is the result of the little white bleeder valve on top of the IP.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k