Mercedes-Benz SL400 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

(6)

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

(6)

Brake Master Cylinder Replacement Service

How much does a Brake Master Cylinder Replacement cost?

On average, the cost for a Mercedes-Benz SL400 Brake Master Cylinder Replacement is $457 with $296 for parts and $161 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2016 Mercedes-Benz SL400V6-3.0L TurboService typeBrake Master Cylinder ReplacementEstimate$787.22Shop/Dealer Price$964.91 - $1431.03
2015 Mercedes-Benz SL400V6-3.0L TurboService typeBrake Master Cylinder ReplacementEstimate$753.22Shop/Dealer Price$930.97 - $1397.13
Show example Mercedes-Benz SL400 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

(6)

Rating Summary
6
0
0
0
0
6
0
0
0
0

David

10 years of experience
170 reviews
David
10 years of experience
Mercedes-Benz SL400 V6-3.0L Turbo - Pre-purchase Car Inspection - Orlando, Florida
Pre-Purchase service - On time with appointment. Follow up call and report was generated immediately which is greatly appreciate. Many thanks!!

Rigoberto

11 years of experience
739 reviews
Rigoberto
11 years of experience
Mercedes-Benz C250 L4-1.8L Turbo - Brake Master Cylinder - Chicago, Illinois
Rigo is a maverick hands down. Don’t take your car for work elsewhere. Especially great at Mercedes—this guy knows his profession! I will be using him for everything related to my car going forward.

Patrick

33 years of experience
1393 reviews
Patrick
33 years of experience
Mercedes-Benz 240D L4-2.4L Diesel - Brake Master Cylinder - Austin, Texas
Perfect!

Rocco

22 years of experience
302 reviews
Rocco
22 years of experience
Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Brake Master Cylinder - Newport Beach, California
Rocco was fantastic!

Excellent Rating

(6)

Rating Summary
6
0
0
0
0
6
0
0
0
0
Number of Mercedes-Benz Brake Master Cylinder Replacement services completed
66+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
experts on our platform

Recent articles & questions

4 Essential Things to Know About Your Car’s Speedometer
The The speedometer on a car is located on the dashboard, and displays how fast the vehicle is going while it is in motion. Today, speedometers are electronic and come standard on all vehicles. Common Problems With Speedometers Speedometers can...
How to Register a Car in Louisiana
Moving Moving to a new area is a bit stressful due to all of the things that have to handled when settling in. If you are new to the state of Louisiana, then you will need to register your vehicle....
P0271 OBD-II Trouble Code: Cylinder 4 Injector Circuit High
P0271 P0271 code definition Cylinder 4 Injector Circuit High What the P0271 code means This diagnostic trouble code (DTC) (https://www.yourmechanic.com/article/what-is-the-on-board-diagnostics-obd-system) indicates that a reference voltage from the fuel injector associated with cylinder number 4 has gone higher than the range...

How do I jump start the battery in a 2012 Nissan Altima?

A dead battery is one of the worst nightmares for drivers. You turn the key (or press the start button in this case) and nothing happens. You’ll need to jump the battery off to get back on the road. Here’s...

Door lock won't open from inside

Hello. If the door will open from the outside and not the inside ,then most of the time the handle has broke or the cable from the handle to the latch mechanism is damaged. The door panel will need to...

Is it work the trouble and cost to repair my 2002 Honda Accord.

The best thing you can do is hire an experienced technician to inspect the vehicle and look for any signs of wear or damage from the use of the vehicle. You should check your maintenance schedule and perform the missed...

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