1. Faulty Light Switch: The problem could lie with the light switch itself. It may be worn out or faulty, preventing it from properly sending the signal to turn on the interior lights.
2. Faulty Wiring or Connection: There might be an issue with the wiring or connections related to the interior lights. Loose connections or damaged wires can disrupt the power supply to the lights.
3. Light Control Module: Some Mercedes-Benz models have a light control module that regulates the interior lighting system. If this module malfunctions, it can affect the functionality of the interior lights.
4. Central Convenience Module (CCM) Issue: The Central Convenience Module (CCM) controls various electrical components, including the interior lighting system. A malfunctioning CCM could be the cause of the problem.
5. Fuse Box Connections: Even though the fuses might appear fine visually, there might be an issue with the connections within the fuse box. Check the fuse box for any loose or corroded connections.
6. Faulty Interior Light Bulbs: If multiple bulbs in the interior lighting system have burned out at the same time, or if the bulbs are loose in their sockets, it can prevent the lights from working properly.
To diagnose and fix the problem accurately, it's best to consult with a qualified mechanic or auto electrician who can perform further testing and pinpoint the exact cause.
