In my earlier reply on this issue somehow my email client didn't add the correct thread ID and it ended up as the new thread "R-Link Source-code request".
That is a CC of a request I've made in the U.K. for the source-code to Renault U.K. via the company secretary (the senior legal affairs officer) and the published R-Link support help-desk. I've received an out-of-office until April 22 reply from the Secretary, and a case reference (Case 500D000000bUEjP / CS-0000026292) from the help-line. I'll update the list with responses.
