Sounds exactly like my situation. I just purchased a 'new' 2006 base coupe because of the lifetime powertrain warranty. In fact the warranty was the deciding factor in buying a new Crossfire now. I was planning on getting a low mileage used XF in a few years.

There seems to be differing opinions about the warranty on new 2006 Crossfires. I am under the impression that they qualify for it. My bill of sales has it written on it.

Also the Chrysler FAQ about the warranty states that 2006 model year vehicles qualify (purchased after 7/26/2007).

See link for more details:
http://www.chrysler.com/en/lifetime_...ranty/faq.html

Q2: What does the new powertrain limited warranty include?

A2: The Chrysler Lifetime Powertrain Warranty covers the cost of all parts and labor needed to repair covered powertrain components – engine, transmission and drive system – on most new Chrysler, Jeep and Dodge 2006 MY, 2007 MY and 2008 MY vehicles.

If you bought your XF after 7/26, I would insist that it has the lifetime powertrain warranty. Your 70k warranty may have just been additional coverage for non-powertrain repairs.

I think that I will start a new thread to get to the bottom of the warranty issue.