Thank you for checking.
LDA is an extension of the prior LDW (see above blog post). In the picture, they show the warning message and a blue line being crossed. Previously, LDW was vibrate steering wheel only - it did NOT beep. It's impossible to know from the blog post whether LDA now has beeping as well as vibrating. But I do know that LDW has been converted from a toggle to a slider, with three options, off, warn, and assist. Anyway, that's what I would like to know - does LDA beep when in warn mode? In general I would like a complete description of the behavior of both features, but no one seems to know.
It seems quite likely that ELDA beeps, at least, because people have been talking about audible alarms. Which is also pretty bad as it seems to trigger if you cross a solid white line, or possibly even a white line that is not solid. But that is a secondary question. The blog post shows a red line being crossed with a different warning message being displayed.