04 crossfire key will not turn ignition, i wiggled steering wheel to lock then lift and key work..now cant move wheel nor key will not turn.

 

If your problem is the same as in this PDF then it is a simple fix.
CLICK

 

Perhaps you are new to your Crossfire & welcome to the Forum.
Your "sticky key" is an "age old" problem common with the first couple of model years, & well documented here with excellent instruction, as onehundred80 posted. Repair or replacement are both options.
If you're not a do it yourselfer, your best bet may be an honest, Independent repair shop specialized/experienced with Mercedes/German cars.

 

Also if you take it to an independent, it wouldn't hurt to take them the repair instructions in onehundred80s link. I suggest printing the out.

 

Is it true that this only happens to 04 , 05 and 06 years ?

 

That was a statement, not a question.
Some early ignition switches may be on a few later year cars, it also may be true that some late 06 cars may have the new switch.

 

So all 2008's will / should have the new switch ?

 

Yes, should unless someone swapped it out