My 300 D 1984 wont shut off with the key,
I checked all the lines and found the tee on the main vacume hose going to the brake booster may have been cracked, it has some type of silicone sealer on it and it also makes a hissing noise when I shut the ignition off

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1984300D 190,000 miles used everyday

The only proper fix would be to replace the booster hose. It's cheaper than you might think, about $25 if I remember right.

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Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



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