Did you ever find out why? My wife's car is doing the same thing.. except that her's won't go into reverse OR park until the engine has been shut off. Frank

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'85 white 300SD - "YCAGWYW" as in: "You Can't Awlays Get What You Want."
'85 gold 300D - "Pain"..for sale, as in..Anyone want to date my Ex-wife... I'll Pay !!
'83 300td - "Tumblin" as in "Dice"
'81 black 300TD Fenix, risen and sold, now residing in NJ