What are the reasons for the failure of the Mercedes HOLD function?
2 Answers
Mercedes HOLD failure is caused by a vehicle malfunction, possibly due to a dead battery. It is recommended to visit a 4S shop for maintenance. Introduction to the HOLD key: The HOLD button is called the hold mode. The hold mode switch can keep the transmission in a specific gear range and drive the automatic transmission like a manual transmission. How to use the HOLD function: When encountering a red light, after the vehicle comes to a complete stop, simply press the brake pedal quickly and firmly. A HOLD key will appear on the upper part of the instrument screen, indicating that the HOLD function is activated. At this point, you can release both feet and hands, and the vehicle will not shift position.
I've been researching the malfunction of the Mercedes HOLD function for a long time. Common causes include sensor dust accumulation or failure, which can mislead the system about the braking status. There are also frequent minor issues with the Electronic Control Unit (ECU), such as internal chip damage or poor contact. Problems within the braking system itself, like insufficient hydraulic pressure or caliper wear, can also lead to HOLD failure. Mercedes' automatic parking system integrates numerous electronic components, making older models more prone to malfunctions. Although newer models are designed with smarter systems, regular inspections are still necessary. It's recommended to have a comprehensive diagnosis at a professional shop annually, including scanning for error codes and cleaning sensors. Before parking on a slope, always test if the HOLD function is reliable—don't rely solely on it; use the handbrake as a backup for safety. In short, paying attention to your car's condition and taking preventive measures early can save a lot of trouble.
