Posts Tagged ‘Mercedes ABS Modulator Failure’

Reasons Behind ABS Modulator Failure in Mercedes

A problem in the braking system in your vehicle can have serious ramifications when it comes to the safety of both you and your passengers. With the workmanship that goes into the design and manufacture of each Mercedes, many owners never expect it to develop problems, but some, like ABS Modulator failure, may become an issue.

What is the ABS Modulator?

The Anti-lock Braking System Modulator, or ABS modulator, as it is commonly referred to, is a vehicle component that is responsible for the optimization of the brake pressure in each wheel. The ABS modulator optimizes the pressure in the brakes so as to prevent the wheels from locking up, especially in case of a hard brake. The modulator comes in handy in the event that the driver applies the brakes in a hurry with the intention to bring the car to a quick and immediate stop.

In such a situation, the driver is likely to apply more pressure on the brakes than is normal. This may cause the wheels to lock up, and the result will be that the car will skid off. Needless to say, such a situation may easily result in an accident because the driver will no longer have control of the wheels. The ABS modulator is therefore an important life-saving feature in the Mercedes.

However, when the ABS modulator senses the excessive pressure that the driver applied to the brakes, it immediately sends out an impulse into the brake calipers that are then released very briefly. This brief release in turn prevents the wheels from locking up. Simply put, the ABS modulator helps to increase and decrease the brake pressure automatically in order to maintain the traction in the wheels.

Causes of ABS Modulator Failure

One of the major causes of the ABS modulator failure is contaminated brake fluid. Because the ABS modulator is made up of metal and rubber parts, it can be affected by contamination in the brake fluid. The most common contaminant in this case is moisture that finds its way into the brake fluid over time. This then causes the metal parts to be corroded and eventually the brake calipers will break down.

In addition, the corrosion can cause the valve in the modulator to get stuck. This makes the modulator’s operation to be largely impaired since the valve is no longer able to open and close and instead it remains open.

Another possible cause of an ABS modulator failure is the inevitable wear and tear that occurs in moving parts. This wear and tear can be accelerated by leaks in the brake fluid that result in increased friction between the moving components in the modulator.

Signs of ABS Modulator Failure

Some of the tell-tale signs that your Benz could have a problem in the ABS modulator include:

ABS light is illuminated

One of the obvious signs that point to a problem in the ABS modulator is the warning light that comes on on the dashboard. This is because of the computerized system through which the modulator functions that is connected to the car’s computer. A problem in the modulator will likely be diagnosed by the computer and an alert will be created through the ABS light on the dashboard.

Poor brake pedal response

Because of the relationship between braking and the ABS modulator, the entire braking system of the car may be compromised by a problem in the modulator. This is because the pressure that is applied during the braking process is transmitted through the modulator, which then triggers a reaction in the wheels. As a result of the breakdown in the ABS modular, the car may not respond to the braking command in time. You may also have to exert more pressure on the brake pads to get a response than you would regularly.

Locked brakes

One of the functions of the ABS modulator is to prevent the brakes from locking, so if they do not work correctly, the brakes might lock, causing the car to skid and possibly result in an accident.

Mercedes Car

In the event that you experience any of these symptoms in your Benz, you should immediately take your car to a licensed shop for a proper diagnosis and resolution of the problem.

Here at Star Motors, we have the experience and qualifications to help get your car back in good shape in record time. All you need to do is give us a call if you live in the areas around San Juan Capistrano, CA and other Southern Orange County areas.

* Mercedes Car image credit goes to: Mih_alex.