My park lights did the same thing, couldnt turn them off unless I used the ignition.
Went to the dealer and after several visits we realised it was a volt sensative issue.
My battery was dying and would not hold a charge overnight.
As the volts dropped strange things would happen like the radio losing the time, Lights turning on, EMS light trigerring etc...,
Replaced the battery and everything was ok.
Bit of a worry, I now do not trvel without a dual battery set up.
Your problem may or may not be similar but thought id let you know.
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