I kept searching and found this website:
Keyless Entry Code Location???
So, I knew I have to search for white/grey box. Located it right away
above brake pedal. It was somewhat difficult to see the sticker side,
but a mirror is not needed - flashlight and little push to the box
reveal the sticker side. But... I could read only 3 of 5 digits, the
rest were covered with a black tape... So, I decided I can start
guessing - only 25 combinations, not so bad. I guessed right in the
first try! Maybe I should start playing lotteries?