Hello all, I have got an 85 300D that has recently developed a bad shake/rumble when I turn off the ignition. It seemed to shut off alot smoother until last week. Any ideas ? Thanks in advance.

I would guess its the motor mounts. My 240D did that as well before I replaced them.

Or the air cleaner mounts.

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85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

I would guess that your vacuum is weak a d it is taking too long to shut off your engine, Maybe the vacuum shut off needs replacing, maybe it is a massive vaccum leak somewhere in the system

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Yep, mine makes a bit of noise all the time and especially when shutting down.

My air cleaner mount looks like a Greek Letter Gamma instead of a Tau. One wing is broken off.

It's on my TODO list.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)

It could be the Vacuum Shutoff on the way out (or some other Vacuum Leak issue to inclued the Vac Shutoff Valve on the Steering Wheel Lock); the Engine Shock Mount Rubber no good, and/or Motor Mounts.

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84 300D, 82 Volvo 244Gl Diesel