As Steve_M says, the LIM indication is nothing to do with the speed alarm, it just shows that the speed limiter is ready to be set (it won't actually function unless you then press the Set button on the right side of the steering wheel). If you don't want to use cruise control or either of the two speed limiters, press the Main button on the right side of the steering wheel, that'll turn the system off. Full instructions p414 et seq in the online manual*.
The speed alarm is different, it just sounds an audible warning and flashes a message when you exceed whatever speeds have been set. I have mine set to 30 & 70, it's quite useful for keeping your attention focused out the window rather than watching the instruments. Full instructions on how to set/disable it are at p127=128 of the online manual*.
*Page numbers might be slightly different in a hard copy manual.