"Check Side Lights"

[AC2717]

Hi All
Whenever I turn my E53 off i get the ding and the "check side lights" warning on the dash. I have checked them and the lights are both working properly (the ones on the front fenders for turn signals).
Every now and again it shows up when I start it and have to clear it out from the check screen


Anyone else thinks a bulb needs to be replaced anyway because it has a weak connection, or are there other side lights that I am not thinking of or
see??

Is it more serious than this because they are flashing when the turn signals are put on and flashing when the alarm is set or shut off