Why the red and green light flashes on rear view mirror of C 280?

The red and green light flashes on the rearview mirror of a Mercedes-Benz C280 typically indicate the operation of the vehicle's alarm system and/or the status of the vehicle's security features. The red light often signifies that the alarm is armed, while the green light may indicate that the system is disarmed or that the vehicle is in a "valet" mode. If the lights are flashing unexpectedly, it may be a sign of a malfunction or tampering with the alarm system. Always consult the owner’s manual for specific information related to your vehicle model.