If you already have a CLAAS machine with an active TELEMATICS licence, you can connect it to other machine manufactures through DataConnect API whenever you want.
You don't have to make any changes to your machines.
The year of construction is irrelevant.
You don't need a special licence.
Sharing data from your CLAAS machine with a third-party system is just as easy. CLAAS, 365FarmNet, John Deere and CNH are already DataConnect partners, and other manufacturers are set to join them – it's an industry-wide solution.