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The Mercedes Sprinter's cruise control may not function due to various factors, like a malfunctioning brake pedal switch, a blown fuse, or a faulty speed sensor. Despite the convenience of cruise control, driving the vehicle without it should not pose any issues. The recommended course of action is to utilize an OBD scanner to identify any error codes stored in the ECU. A faulty brake pedal switch can be identified if the cruise control activates and then shuts off automatically. In the case of a blown fuse, you can easily locate the fuse panel and inspect it for damage. The speed sensor is crucial for cruise control operation, and you may experience issues if your car's speedometer is inaccurate or intermittently malfunctioning.
If the cruise control on your Mercedes Sprinter is malfunctioning, be sure to inspect the vacuum actuator, vacuum hoses, transmission speed sensors, and fuses.