My sunroof has began to whistle as I'm driving at hiway speed. It seems to be worse in the cool mornings than in the evening on my way home.

Any suggestions on adjusting it or treating the seals would be appreciated. In case the year makes a difference, it's a 2003 s-type.

 

Usually whistles simply mean that the car doesn't know the words to the song. Other mechanical parts might hum for the same general reason.

Open the roof completely and clean the edge of the body, looking for nicks and dirt. Move the glass panel to different positions to clean the rubber gasket, there's probably a piece of cr*p causing a minute gap. Doesn't take much.

 

I'll give that a try, thanks for the tips.

Whistles and hums ..... I hope those are the only body sounds it'll make