S60 D5 (2006) auto sticking in park

on the last 3 mornings my gear has been stuck in park, but only first thing in the morning. if i switch the ignition off and then on again the problem clears. seems a bit weird. it has been really cold on these days. any thoughts? i guess if it persists i'll take it to the dealer

same again this morning

I can only think it's the interlock. When you press the brake pedal can you hear a little 'clunk' noise near the gear selector? This is the interlock clearing the gate so you can shift out of 'P'. If you can't hear it in the mornings, it might be a wiring fault - not sure how the cold would affect it, as heat normally has an adverse affect on wiring.

no clunk noise at all. same again this morning. the weird thing is it only does it overnight, when i get in the car after work its fine. i think i will book it in, only problem is i can't demonstrate the problem to the dealer. also my boot won't lock now. at least its happening now while there still 8 month on the warranty.