Thank you for the awesome thread! Works like a charm! I have a 2010 IS250 prestige
For those with a MY10 IS250 who says that it doesn't work, I think I've figured it out what the problem is.
I tried last night several times and couldn't get it to work for some reason even though I followed each step to a T.
Now, when it comes to (STEP 6) instead of holding it down for 10-15secs or longer as explain, hold it down for 25secs & it will definitely work!
I tried timing it for 20secs and failed. It wouldn't work...
So my guess is that, the (longer period of time) that is explained in (STEP 6) is (25secs)
If I can find some free time, I'll record it and post it up here....
Good luck & hope this helps! ^_^