I’ve got a 2013 G550 that we have been driving for a few years. The distance measuring function recently has been showing INOPERATIVE when selected and Distronic is also Inop. We cleaned the front sensor, the Battery was changed recently ( as part of the 60k check) and it worked perfectly well up until now!

any ideas?

could be a bad sensor at 9 years - I’m just looking for any suggested trouble shooting before I visit the dealer

thank you all