Заходишь в то самое секретное меню и меняешь
To access the menu follow these simple instructions.
make sure the audio is off.
press and hold down the SETTINGS button,
with the SETTINGS button pressed ROTATE THE VOLUME BUTTON ANTI CLOCKWISE, keep rotating untill the menu comes up.
in this menu you can change the service reminder and reset it. there is a very basic diag tool which is no use to the dealer so you will not get much info from it. (diag for the audio a satnav only).
there are some other setting you can play with as well, have fun
Успехов.