What To Do If Mercedes C320 Rear Wheel Leaking Brake Fluid?

Certain components of your car are necessary for it to function properly and, furthermore, for both your safety and the safety of other motorists. One of them is your braking system, and if there is any part that needs to be in good operating order, it is this one. In order to do this, we must first identify the sources of brake fluid leaks before determining how to stop one. Read the article below to know what to do if the Mercedes c320 rear wheel leaking brake fluid?

What Does Brake Fluid Do For A Mercedes C Class?

Therefore, we’ll quickly explain the function of this well-known brake fluid in the braking system of your Mercedes C class before we start our post. To put it simply, when you press the brake pedal, your brake fluid is compressed and activates your brake callipers, which then squeeze the brake pads on your discs. This is how a braking system works: it has rigid pipes that are filled with brake fluid and are pressurised by the master cylinder. As a result, it’s crucial to maintain the proper quantity of brake fluid on your Mercedes C class, especially if you don’t know how to carry out this manipulation.

What Causes A Brake Fluid Leak On A Mercedes C Class?

Below are some of the causes for Mercedes leaking brake fluid.

1. The Hose From Brake Master Cylinder Leaking

A hole in the delivery hose that transfers fluid from the brake master cylinder to the clutch master cylinder is one of the most frequent causes of brake fluid leakage around your clutch pedal.

2. Cylindrical Wheel

This component, which is only found on drum brakes, can leak and cause an imbalance in the braking system.

3. Master Cylinder Leaks

There are several places where the clutch master cylinder is vulnerable to leaks. The plastic fluid reservoir is one example. The master cylinder seal failing is actually the more likely issue. The corrosive nature of brake fluid will eventually wear down the seal, resulting in a leak.

4. Exhaust Brake

This typically happens after a recent brake drain, and it’s frequently not tightened properly.
Connection Pipe with a Leak: The metal pipe that joins the master and slave cylinders occasionally leaks, but it is probable that this is the source of the leak you are observing. Since the fluid is under pressure, it could leak from any end (or through a hole corroded in the pipe in older vehicles).

What To Do If Mercedes C320 Rear Wheel Leaking Brake Fluid?

Going to your garage is the only option if your Mercedes C class experiences a brake fluid leak. If it is small, make sure you are level and drive slowly to the garage; if it is large, don’t drive and have your car towed. Accidents result from brake system failures in general. However, there are a few routine tests you may perform to reduce the risks:

  • Regularly check the brake fluid level.
  • Every two years or 40 000 miles, you should bleed your brakes.
  • If you notice that the brakes on your Mercedes C class have gone “soft,” replace the brake fluid.

Frequently Asked Questions

Here are some frequently asked questions about the Mercedes c320 rear wheel leaking brake fluid.

1. Why Is The Rear Wheel Losing Brake Fluid?

Image for a frequently asked question about the Mercedes C320’s rear wheel leaking brake fluid
The pistons that operate the pads or shoes can get hyperextended, shattering the cylinder seals, and weeping fluid to the afflicted area if the rotors and drums and corresponding pads and shoes become worn.

2. Why Is My Tyre Leaking Brake Fluid?

A faulty wheel cylinder If you have drum-style brakes and you notice braking fluid on one of the walls of your tyre, you most likely have a bad wheel cylinder. Your car tugging to one side as you drive is another sign of a brake leak from a wheel cylinder. This is caused by unequal hydraulic pressure.

3. Can A Car’s Rear End Leak Brake Fluid?

The centre or back of the vehicle may see a pool of brake fluid if the brake master cylinder or brake lines are leaking (away from the wheels).

4. Is It Possible To Drive With A Broken Rear Axle Seal?

The car shouldn’t be driven if there is a large fluid leak that compromises the transmission. Driving your car is safe as long as you maintain the transmission fluid full if the leak is little and you can’t make it to an appointment for a few days.

5. Driving While The Brake Fluid Is Leaking Is It Safe?

To protect the safety of you and your family, it is essential to retain enough brake fluid in your car. Because brake fluid leaks are the most prevalent reason for complete brake failure, you should never drive a car that has a leaky brake fluid system.

6. Where Is The Typical Source Of Brake Fluid Leaks?

Checking which part is above the leak can sometimes indicate the source because leaks are typically caused by problems with the master cylinder, ABS module, brake line, bleeder valve, rotor, drum, pistons, or general brake components.
How much does fixing a brake fluid leak cost?

Typically, a master cylinder leak will run between $450 and $550. Between $150 and $200 can be spent on a brake line leak. Costs for a brake calliper leak range from $550 to $750. Typically, a rear drum cylinder leak costs between $150 and $200.

5. How Is A Brake Line Leak Temporarily Fixed?

Many lovers of do-it-yourself auto repairs keep Rescue Tape in their glove box or trunk because it is a relatively common commodity. This can be used as a short-term, efficient brake line fix to get you to the specialist. Some drivers have also utilised electrical tape or duct tape, with varying degrees of success.

6. When Brake Fluid Escapes, What Colour Is It?

Do not drive your car if you notice yellow fluid flowing from it. Your car’s leaky fluid is most likely brake fluid. Brake fluid has a light yellow tint when it is new, but it gradually darkens over time. If not kept up with, it could even appear dark brown.


There are numerous reasons why the Mercedes c320 rear wheel leaking brake fluid. A worn seal or O-ring is the most typical culprit. The piston itself may occasionally be harmed and require replacement.

A crack in the calliper body is another factor that could contribute to a brake fluid leak. It’s crucial to get your calliper fixed right away if you detect brake fluid dripping from it. A mechanic will be able to identify the issue and carry out the required fixes.

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