What Causes Mercedes-Benz Power Steering Failure?
2 Answers
Mercedes-Benz power steering failure is caused by issues such as power steering pump malfunction, solenoid valve power failure, or poor plug contact. Below are detailed explanations of these causes: Power steering pump malfunction: Lack of oil, obstructed oil passages, or air in the oil passages require the correct selection of hydraulic oil. Solenoid valve power failure: Forms of power assistance failure such as torque sensor malfunction require regular inspection of the solenoid valve. Poor plug contact: Poor contact in the control system wiring harness plug, blown fuses, system fuse burnout, relay damage, or damage to the controller, motor, or sensors affecting the electric power steering system necessitate professional inspection and repair at a service center.
With years of experience in car repair, I've handled numerous Mercedes power steering issues. Common causes include power steering pump failure—when it fails, hydraulic pressure can't be maintained, leading to heavy steering, especially in older cars with worn pump cores or oil leaks. Insufficient or dirty power steering fluid can also clog the system; if the reservoir level is low, it needs immediate topping up. A loose or broken belt, which cuts off power transmission, may cause squealing upon startup. With the widespread adoption of electric power steering now, sensor issues like torque detection errors or motor overheating can cause malfunctions. Electrical problems, such as a blown fuse, can completely disable the system. The impact is significant: non-responsive steering at high speeds is extremely dangerous. It's advisable to check fluid levels and belts during every maintenance service, use specialized fluid for replacements, and not delay until major issues arise. For repairs, visit a 4S shop or a professional workshop—only then can you drive with peace of mind.
