I am having transmission issues (clunking from 2nd to 1st and from 1st to 2nd) on my '84 300 SD. I am changing the transmission fluid and will likely try Tran-X, but I am also looking at the vacuum hoses and lines, per suggestions on this forum. I also bought a Mity-Vac hand-operated vacuum to test the various connections..

Some of the hard plastic lines are discolored and brittle and I'd like to replace them, but I cannot find where to get them besides, perhaps, at the dealer, which I have avoided thus far. Any suggestions? Can rubber air hose substitute for them?

Also, the flexible 3-way air connectors that are in my car are unavailable in auto stores near me. There is a hard plastic version for a whopping $3.99 each (multiply times all of the ones in the car), but these are not Mercedes specific.

So, if I find cracks or leaks in these, what can I use to replace them?

Thanks.

I bought my vacuum lines and connectors from the dealer. I think they wereC$3 a meter. You can also get the right colours.

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1989 420 SEL

Check your driveline's flex disks. They often wear out. Isolate one end of the drive shaft while twisting the other.

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)