OK, I have the turbo "snorkel" on tight and have replaced the leaky, dry-rotted old fuel return hoses on my '83 300D with the '85 engine. But now she's started "dieseling" at shutoff. (Did it a time or two before I replaced the hoses and has done it once since.

There still seems to be some fuel leaking at each cylinder around the seam between the glow plugs and the head.

Anyway, the dieseling seems to happen when the car has been started cold and driven only a short distance, maybe two to five minutes. Then when you switch off the key, the engine doesn't stop without opening the hood and pushing the kill spot on the linkage. ... If the car is warm, the engine has died at switch-off every time so far.

What's the first thing to check?

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-- 1983 300D, acquired 10/19/2005 at 215,000+ turbodiesel miles ... engine croaked almost immediately ... back on the road at 217,210 with a 144K turbo motor from a donor '85. ... May 2007, replaced radiator. ... Now (2/28/08) about 240K miles and dead due to battery?