My 2006 XK8 message center comes on with a message, cruise not avaliable, check rear lights. It comes on after about 10 minutes of driving. Anyone ever heard of this? The rear lights are functioning but when the message is on the cruise does not work.

 

have adaptive cruise control?

 

Not adaptave just your standard cruise control. Also I checked my back lights the last time I got the error message and they all worked.