The value should be something like this:
Take 43750.4326 (made up number)...
Change to: 43750
No decimal on the end.
Save the config.txt
Close Notepad, or Notepad ++ if you used that to edit the config.txt file.
Submit the asset and you should be good to go.
For assets such as the speedo.tga, I highly recommend checking on Jointed Rail under updates for a new interior to replace the one you have that's faulty. It's actually easier and quicker than trying to fix this one yourself.
When you install the new version, the old one may be open for edit. right-click and choose submit and not revert to ensure you have installed the updated asset.