Steering wheel controls and backup camera both stopped working at the same time.

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Are you 100% sure the car isn't haunted? The sudden loss of functionality in specific steering wheel controls and the backup camera in your GLC 300 could indicate a wiring issue or a problem with the steering wheel control module. Since only controls on the right side are affected, it suggests a localized problem. It may also be a fuse or relay that's given up the ghost (see what I did there?). Start by checking the wiring connections behind the steering wheel and inspecting for any visible damage or loose connections. If everything appears intact, the issue may lie with the control module itself. It would require professional diagnosis and potential replacement by a qualified technician at a Mercedes-Benz dealership or reputable auto repair shop. If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!