Mercedes-Benz CLS400 Brake Master Cylinder Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(8)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(8)

Brake Master Cylinder Replacement Service

How much does a Brake Master Cylinder Replacement cost?

On average, the cost for a Mercedes-Benz CLS400 Brake Master Cylinder Replacement is $524 with $328 for parts and $196 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2017 Mercedes-Benz CLS400V6-3.0L TurboService typeBrake Master Cylinder ReplacementEstimate$873.26Shop/Dealer Price$1042.37 - $1538.34
2016 Mercedes-Benz CLS400V6-3.0L TurboService typeBrake Master Cylinder ReplacementEstimate$909.91Shop/Dealer Price$1090.78 - $1623.29
2015 Mercedes-Benz CLS400V6-3.0L TurboService typeBrake Master Cylinder ReplacementEstimate$885.99Shop/Dealer Price$1060.94 - $1575.56
Show example Mercedes-Benz CLS400 Brake Master Cylinder Replacement prices

What is the brake master cylinder and how does it work?

The brake master cylinder has a piston that pressurizes fluid in the brake lines to each wheel cylinder as you apply force to the brake pedal. That pressure moves the pistons that are in the wheel cylinders. As the pistons in those wheel cylinders move, they force the brake pads or shoes tightly against the rotors or drums allowing the car to stop quickly.

The size of the pistons in the master cylinder and in the wheel cylinders are carefully selected when designing a car. This allows drivers to apply moderate pressure on the brake pedal when stopping, but creates tremendous pressure applied at the wheel cylinders. A car can then stop quickly even at high speeds. Depending on how much force is applied to the brake pedal, the pressure in a car’s brake lines will typically be in the range of 800 PSI to 2,000 PSI.

Master Cylinder

When to replace the master cylinder?

  • External fluid leaks. There should be no fluid visible on the external surfaces of any portion of the master cylinder or the plastic fluid reservoir.
  • Low, slowly falling, or spongy brake pedal. Faulty internal seals on the piston can cause internal leaks and also seepage of brake fluid into the power assist brake booster. Internal leaks will typically be accompanied by a low pedal, a spongy brake pedal, or a pedal that slowly sinks as you maintain pressure. In all cases, you will experience reduced braking abilities.
  • Discolored brake fluid. No brake fluids, other than those specified for the year, make, and model, are fully compatible with a car’s internal rubber seals in the master cylinder. Discoloration of brake fluid can also occur due to moisture and particulate contaminants in the fluid.
  • Warning lights on the dash. If the brake system warning light illuminates, there are several potential causes but failure of the master cylinder is in the list of causes that would have to be investigated.

How do mechanics replace the brake master cylinder?

  • On vehicles with power brakes, the master cylinder is bolted to the metal housing of the power brake booster. There is usually an electrical plug connecting to a brake fluid level sensor on the master cylinder reservoir and that plug must be disconnected.
  • Once all steel brake lines are disconnected from the master cylinder, the master cylinder is unbolted from the brake booster and removed from the vehicle.
  • The new master cylinder must be bench-bled to expel air from internal passages that contain the piston. Then the new master cylinder is bolted to the brake booster and the brake lines are reattached. The electrical plug for the fluid level sensor is reconnected.
  • Whenever a new master cylinder is installed, brakes lines to wheel positions must be bled to remove air, old fluid and contaminants. If your vehicle is equipped with anti-lock brakes, the mechanic may use a bidirectional scan tool during brake bleeding to actuate the ABS pump, thus ensuring that all air is removed from the complex valving in the ABS system.
  • All brake line connections that were removed during the master cylinder replacement are inspected for any leakage and the vehicle is road tested to ensure normal operation of the brakes.

Is it safe to drive with a master cylinder problem?

No, any fault in the master cylinder, which is part of the braking system creates a safety risk. A fully operational brake system is essential to quickly stopping your car. Driving a vehicle isn’t safe, if the master cylinder is leaking or has other faults, as braking distances might be longer than normal. The braking system on a vehicle is among the most important safety systems and must be fully functional to safely drive your vehicle.

When replacing the master cylinder keep in mind:

  • The master cylinder is only one component of many in a vehicle’s braking system. During replacement of the master cylinder, all vehicle braking system components should be inspected to ensure maximum braking power is available.
  • The amount of friction material remaining on the brake pads and brake shoes should be verified.
  • Brake lines and flexible rubber hoses at each wheel position should be inspected for corrosion and deterioration.
  • The power brake booster should be evaluated to ensure that power assist is working properly.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(8)

Rating Summary
7
0
0
0
1
7
0
0
0
1

David

14 years of experience
463 reviews
David
14 years of experience
Mercedes-Benz CLS400 V6-3.0L Turbo - Brake Pads Replacement (Rear) - Marietta, Georgia
Always delivers!!!

David

14 years of experience
463 reviews
David
14 years of experience
Mercedes-Benz CLS400 V6-3.0L Turbo - Oil Change - Marietta, Georgia
Always deliver!

Tinashe

14 years of experience
781 reviews
Tinashe
14 years of experience
Mercedes-Benz CLS400 V6-3.0L Turbo - Oil Change - Marietta, Georgia
Delivers every time! I can always count on this guy.

Casey

20 years of experience
61 reviews
Casey
20 years of experience
Mercedes-Benz CLS400 V6-3.0L Turbo - Car Battery Replacement - Sugar Land, Texas
Casey was right on time and finished very quickly. Great experience!

Excellent Rating

(8)

Rating Summary
7
0
0
0
1
7
0
0
0
1
Number of Mercedes-Benz CLS400 services completed
88+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

B2106 OBD-II Trouble Code: Throttle Position Input Out of Range High
B2106 trouble code means there's a range issue with the throttle position input in a 4WD system, caused by a damaged circuit in the 4WD system.
The Guide to Right-of-Way Laws in Florida
Right-of-way Right-of-way law in Florida does not tell you whom has the right of way in any given traffic situation. It actually tells you who has to yield the right of way. Most intersections are marked, and this makes determining...
How Does a Heads-Up Display (HUD) Work?
Driver Driver safety has become paramount in recent years. There has been a strong emphasis on ensuring you as a driver can keep your eyes on the road as much as possible. Devices have been incorporated into vehicle controls for...

Car wont start - 2001 Nissan Sentra

Hello there, a variety of faults will cause your 2001 Nissan Sentra to overheat, be low on coolant, and now have starting trouble. The first problem is the vehicle being low on coolant (https://www.yourmechanic.com/services/top-off-coolant), either there is a leak in...

Issues going into reverse 2002 Ford Escape

Hi there - most likely your problem is internal to the transmission (https://www.yourmechanic.com/question/shifting-issues-from-drive-to-reverse-and-back-to-drive) itself. Check the fluid level of the transmission first - low fluid level can cause the problem you describe. If fluid level is adequate, the problem is...

limp mode

This problem may be a wire connection or TCM or PCM issue. The first thing that has to be done is to get communication with the TCM. The different computers communicate all to the engine computer and then to the...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com