Mercedes-Benz R350 sporadic ignition and electrical failure when starting on Mercedes-Benz R350

Some Mercedes-Benz R350 owners report experiencing sporadic ignition and electrical failures when starting their vehicles, often linked to various electrical system problems and wiring issues. These owners highlight the importance of accurately diagnosing the root cause, which may involve checking components such as the alternator, starter, battery, connections, ignition system, and fuel system. Symptoms like dimming lights, electrical failures in windows and locks, and frequent dead batteries are common indicators of underlying issues. Additionally, some owners have encountered specific problems with the electronic ignition switch (EIS), which can be costly to repair. Reports also mention issues with the SAM (Signal Acquisition Module) and battery module, leading to erratic clock behavior and beeping sounds when the car is off. Prompt diagnosis and repair are crucial for resolving these ignition and electrical concerns.