Low Power Steering Fluid: If the power steering fluid level is low or the fluid has become old and contaminated, it can lead to noise in the power steering system. The power steering fluid helps lubricate the components and reduce friction. When the fluid level is low, it causes air to enter the system, resulting in a whining or squealing noise.
Worn Power Steering Pump: The power steering pump generates the hydraulic pressure needed for the power steering system to operate. Over time, the pump may wear out due to normal wear and tear or due to contaminants in the fluid. A worn pump can produce a whining, grinding, or humming noise.
Faulty Power Steering Belt: If the power steering belt is loose, cracked, or worn, it can slip and cause a screeching or squealing noise. The power steering belt is responsible for driving the power steering pump, so any issues with the belt can affect the pump's operation.
Faulty Steering Gear (Rack and Pinion): The steering gear is responsible for converting the rotational motion of the steering wheel into the left and right movement of the wheels. When the steering gear wears out or fails, it can cause a knocking, clunking, or grinding noise when turning the steering wheel.
Air in the Power Steering System: If air enters the power steering system, it can cause a spongy feeling in the steering and produce a gurgling or hissing sound. Air in the system can occur due to a leak or during certain repairs or maintenance procedures.
Worn or Damaged Hoses: Aging, extreme temperatures, or mechanical stress can cause the power steering hoses to deteriorate and develop cracks or leaks. Worn or damaged hoses can introduce air into the system and create a whining, hissing, or growling noise.
If you notice unusual noises coming from the power steering system of your CLS 550 Benz, it's important to have it inspected and diagnosed by a qualified mechanic as soon as possible. Ignoring the issue can lead to further damage and more expensive repairs.
