Spare key

I got mine cut at Home Depot. The Cascadia uses blank 19 (the Chrysler one).

 

On my last tractor, a Mack, I was able to get Mack blanks, and took them to the hardware. They cut exact, and worked for door and ignition.

 

Freightliner was at one time a Daimler product, no idea if they still are. Makes sense that they would use a Chrysler key.

 

I got 2 from freightliner that didn't work

 

Home Depot. No Immobilizer in the key, so it's gonna work for the ignition. Also if they cut it wrong they'll fix it for free.

 

If it's anything like Mack, you need to get the blank from Freightliner. When I had two spares cut for my truck, I went to Ace Hardware and a regular locksmith, both cut keys using their own blanks that would not work on the doors or ignition, had to get the proper blank from Mack, the locksmith cut it, works fine. Mack claims it has to do with key thickness.