Reviving this thread from the dead because I had this issue for a long time where the speedometer was in KPH but I wanted to change the dial to MPH and you can't do that in the user settings in the car. For those of you who use SDD and are comfortable with modifying the CCF, here is the solution:

1. Start SDD and connect vehicle DA-Dongle or Mongoose cable (I used a modified Mongoose clone cable with success). Recommended to plug in your laptop and hook up a 50a 13.5v battery charger also, but I had a fully charged battery so I didn't bother. Don't attempt software updates without a charger, but small stuff like this is fine.
2. Enter "Service Functions" in SDD
3. Click the yellow key on the right to access Engineering Mode.
4. Put your seed into a seed calculator (available everywhere online, look around the forums and some guy wrote a Python script for it too) and be sure to click "CCF EDITOR" under Jaguar Functions before receiving the password.
5. Copy password and paste into SDD. Engineering mode is active when there is a yellow bar at the bottom of the SDD window.
6. Enter Service Functions: Special Applications: Car configuration management- Current vehicle car configuration modification
7. Wait for SDD to read your modules. Follow all prompts.
8. A VERY long list of available modification parameters will come up. I suggest not touching anything you aren't 100% sure of!!
9. Scroll slowly and find the parameter that says "Main scale units". This is the single field that controls your speedometer needle and dial. Below it is "minor scale units" which controls the small numerical display below the dial. I did not touch this.
10. Change from km/h to mph or whatever you want.
11. Change any other parameters you feel comfortable with. I suggest not touching anything you aren't 100% sure of!!
12. Click the green tick on the right of the SDD.
13. Confirm you want to "download" the new CCF to your car. "Download" is the correct terminology- the car itself is downloading new files from SDD to itself.
14. Follow any prompts that SDD gives you regarding turning on or off the ignition, etc. Be patient and cross your fingers. Your car will cycle itself on and off, make a few weird noises, and at some points go completely black.
15. Ignition will reboot one final time upon a successful download and you will be prompted in SDD to return to the main screen.


The options are greyed out on my screen only because I hadn't entered Engineering Mode yet.