I have a similar problem no lights, no heat, no chill at all on my 2018 GLE factory cup holder. Not covered by CPO according to my dealer on March 2021.took delivery Oct 2020.
2009 E350 selenite Grey
2018 GLE43 Designo White
2019 E300 Lunar Blue
2009 E350 selenite Grey
2018 GLE43 Designo White
2019 E300 Lunar Blue