Not brave enough to try it, dying to know.....
so what actually happens??
As Joe explained it's a short cut way of lowering/raising all the glass ... your moon/sun roof will open and close as well and if your slider guides aren't the best, there is potential of damaging the whole track mechanism as the most important part is made up of plastic which is the guide sliders. they break easily and bend the metal thin rods that are attached.
If your moon/sun roof is in good shape and works flawlessly, you can go ahead on hold the buttons on the FOB or turn/hold the key.
Did you know, you can also hold your FOB to your chin facing up and extend the range by an amazing distance,
try it next time you walk out the mall where it normally wouldn't work, it will when you use your skull as an antenna. <-- NO JOKE, TRY IT!!!
Open all the windows and sun roof by holding the LOCK/UNLOCK button on your FOB for more the 4sec,
get all that toxic stale summer heat out of the interior before getting in.
Since were talking about chimes, is there any possibility of turning off the lock beep when I hit the button twice? I know you can go to the dealer to disable it but I don't think it's worth dishing out all that cash....
- Lock Chirp ON/OFF
It's in your OM for the year of your LS, your LS would need to be equipped with a Message center.
^ downloadable from the "Tech Articles" section in the top menu bar ^