na lexusownersclub.com doszukałem się takiej intrukcji
1) find the "in car tools" in the trunk, in the tire jack kit which fits next to the spare. They are easy to miss.
2) use the rods to push back through the holes. Use lots of force. My rods went all the way in.
3) this will loosen the clock display. then you'll need to jiggle it and pry it off.
4) then eject the old map dvd.
5) turn car off.
6) remove fuse #4 (TV.1 or something like that) from the fuse box right above the parking break pedal. (bezpiecznik należy wyjąc i włożyć z powrotem)
7) turn car on. (it'll complain in english and japanese that the dvd can't be read.)
8) insert new map dvd (in my case the patched 7.1 with 5.1 loading.kwi file). It will take a minute to load.
9) put clock cover back on, and you're done.