Tail lights turn on instantly with the key on and the head light switch off also with this the cruise will not work

SOURCE: tail lights won't turn off

Check the parking light switch on the top of the steering wheel.

SOURCE: lights stay on with key out

I have dealt with similar issues in a couple of other vehicles, most recently in my own wifes car. Inside the dashboard of most late model cars, in the general vicinity of the stereo/nav system, or computerized components is the electronic brain of the vehicle, and there a a series of power relays, regulating the distribution of power to components inside and on the exterior of your vehicle. So imagine this part, under constant use for a number of components on and in your vehicle being used just as much if not more than anything else in the vehicle. With that said, many manufactuers have different names for the part, but the part name I have dealt with over the past 2 repairs is " Computerized electronic control module". Hands down the smallest, most delicate part I have ever had the joy of replacing in both vehicles. The part in both repairs were not cheap, I found 1 for a 2007 V.W. Jetta at a scrap yard, luckily, for $380.00, but it retailed at a dealership here for just under $1000...Holy S%^#!!! And the second was on an 2009 Acura TL, both were tricky to get to, mainly because so much has to be removed to access this part, and they both sat nesstled in the tiniest of cradles.

If you do not have much experience in dealing with tiny, delicate electronic components, or do not feel comfortable working on vehicles and tight places with the chance of smashing knuckles, ect. I would recommend you pay the cost of having a repitable, accredited mechanic, one who may even specialize in foriegn makes and models, and may have electrical work somewhere in their title, do the work under warranty.

There is know price or cost on the value of "Peace of Mind"

P.S.
If these are the only 2 symptoms you have as of now, consider yourself lucky, and it can and will get worse as the problem persists without repair. I.E. Window power failure, stereo/audio, nav failure, wiper failure, display light failure, dome lights, power locks....and so on.

Good Luck,
Jason