Mine does not turn off in park. A few times I have had to fetch something out of the trunk while leaving the driveway (or re-close the trunk before I changed the stops) and put the vehicle in park but still running and can hear the PDC alarming when it detects me walking behind the vehicle. Perhaps it can be coded - mine is not...

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David.X5
2001 X5 4.4i Sport
SOLD! at 160k miles