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Originally Posted by sirlan
I've forgotten to put mine in park before turning it off a couple of times. I just put it in park and then take the key out.
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I drive a HAH, but years of driving manual trannies have given me the habit of stopping and turning the key off with the car in the last gear used. I've done this several times in the HAH, stopping and turning the key off with the shift lever in Drive. I then move to Park and remove the key. This will work in the HAH to prevent engine restarting. I've not done it consciously for that purpose though, and I'm trying to change the habit just in case there might be some harm done by that practice. I think I read a thread somewhere on this board some discussion of possible harm done by keeping Auto-stop engaged by turning off the key in Drive, then shifting to Park. I don't recall mention of any specific bad effects; I'm certainly not qualified to make the call; I can only report that I've not noticed any bad effects from the dozen or so times I've done it. Did the same thing on an Audi A4 Tiptronic way more than a dozen times over 140k miles with no transmission problems.
Upside to keeping Auto-stop engaged by key off in Drive, shift to Park:
miniscule mpg gain, reduced engine wear by one startup.
Downside?? Possible transmission issues? Interference with engine shutdown protocols--if any exist-- that depend upon shifting to Park? ECM issues? All questions I can't answer, so I'm trying to go to Park, then key off, though I, too, don't like engine restart and killing it right after the restart.
Lewis