DonS550

I have a 2018 S450 that I recently purchased, my last 2015 S550 had cornering lights, and I see the function on other models, however the cornering lights on my car (which the LEDs are present in the space) are not functioning. I hear mixed messages; dealer #1 says they should be working. Dealer #2 says they don't work on S450 but do on S560. Dealer #3 says both cars are technologically identical, with exception to some options and engine sizes. I called MBUSA customer care and forget it! they don't know what I'm talking about and refer me to my owner's manual. HELP! Are they supposed to work or not.

Thanks,
DONS550