Mercedes-Benz of Stevens Creek

Mercedes-Benz Master Cylinder And Parts

No matter which type of braking system is at work in your Mercedes-Benz vehicle, it depends on the master brake cylinder. What it does is simple.

How a Mercedes-Benz Master Brake Cylinder Works

First, you depress the brake pedal. That pedal pushes a piston through the master brake cylinder, which in turn forces brake fluid through brake lines and hoses to cylinders -- called slave cylinders, unfortunately -- at each wheel. Those cylinders drive pistons to force the friction material against the wheel hubs, which causes the wheels to stop rotating.

That friction material differs by braking system, though.

Disc Brakes

In this set-up, the brake calipers press brake pads against the brake rotors.

Drum Brakes

This type fastens the brake shoes to the brake drums to create the resistance needed to slow the wheels.

How to Spot A Faulty Master Cylinder

While your master cylinder is designed to last your car's full lifespan, it can go bad. If you don't keep the brake fluid reservoir filled, that's a sure way to experience issues. There are other ways it can fail, though, from fluid leaks to decayed seals and more. Signs of master brake cylinder trouble include:

  • Mushy-feeling brake pedal: If your brake pedal feels unusually soft underfoot, that's a sign that your master brake cylinder is having difficulty producing the hydraulic pressure needed for braking. The pedal sinking completely to the floor is a worst-case scenario.
  • Dirty-looking brake fluid: If your brake fluid looks exceptionally dark or dirty, the rubber seals on the master cylinder may have failed. That allows corrosion to set in, affecting the master cylinder, lines, and other components.
  • The "Check Engine" light comes on: While this is a generic warning that requires connecting a code reader to properly diagnose, it may come as a surprise that a faulty master cylinder can trigger this alert. That's because newer models come with sensors in the master cylinder. If they detect a problem, they can cause both the brake warning light and your engine lights to engage.
  • Buy Genuine Mercedes-Benz Master Cylinder Parts Online for Guaranteed Compatibility

    Your manufacturer makes the only master cylinders and parts that are designed specifically for your model. Find them in our online parts catalog, complete your order, and you'll have your issue resolved in no time. Too big a project for you to tackle? Take your Mercedes-Benz vehicle to your local dealership and let the expert mechanics there take care of it!

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    Color
    Condition
    MSRP
    Color
    Condition
    MSRP

    Brake Line

    $525.00
    Part Number: 199-420-22-26
    Mercedes-Benz Mercedes-Benz
    Positions: Right
    Replaces: 199-420-14-26
    Description: Right brake line.
    Fits:
    • Mercedes-Benz:
      • SLR McLaren
    Backordered

    Line

    $55.00
    Part Number: 123-420-61-28-64
    Mercedes-Benz Mercedes-Benz
    Positions: Right
    Other Names: Brake Line
    Replaces: 123-420-61-28, 124-420-91-28, 201-420-18-28, 202-420-15-28
    Description: From master cylinder to rear hydraulic unit. From hydraulic unit to left front wheel. Right. From front master cylinder to hydraulic...
    Notes: To be adapted during assemblyfrom ident no. To be adapted during assemblyonly used with anti-lock braking system.
    Fits:
    • Mercedes-Benz:
      • 190C,
      • 230,
      • 230SL,
      • 280,
      • 300SD,
      • 300SE,
      • 300SEL,
      • 380SE,
      • 400E,
      • 400SE,
      • 400SEL,
      • 500E,
      • 500SEC,
      • 500SEL,
      • 500SL,
      • 560SEC,
      • 560SEL,
      • 600SEL,
      • 600SL,
      • G55 AMG,
      • G550,
      • S420

    Reservoir Cap

    $15.00
    Part Number: 202-430-00-14-64
    Mercedes-Benz Mercedes-Benz
    Other Names: Brake Master Cylinder Reservoir Cap, Cap
    Replaces: 000-430-00-14, 000-430-75-14, 000-431-79-33, 000-431-91-33, 0004300014, 0004307514, 0004317933, 0004319133, 001-431-44-87, 0014314487, 202-430-00-14, 202-430-00-14-05, 211-430-00-14, 211-430-01-14-05, 211-430-02-14-05
    Description: Expansion tank. Brake fluid reservoir. Sedan,. Container. To expansion reservoir.
    Notes: Included with master cylinder. Included with reservoir assembly. As of code 807 up to a094927 also order cover above brake fluid reservoir.
    Fits:
    • Mercedes-Benz:
      • Sprinter 1500,
      • Sprinter 2500,
      • Sprinter 3500,
      • Sprinter 3500XD,
      • Sprinter 4500

    Brake Hose

    $25.00
    Part Number: 204-420-09-48-64
    Mercedes-Benz Mercedes-Benz
    Positions: Right, Front
    Replaces: 204-420-04-48, 204-420-09-48
    Description: Front left and right.
    Notes: No longer available.
    Fits:
    • Mercedes-Benz:
      • C300

    Vacuum Line

    $38.50
    Part Number: 204-430-39-29
    Mercedes-Benz Mercedes-Benz
    Description: Separation point to vacuum pump or tothe intake manifold.
    Fits:
    • Mercedes-Benz:
      • C300,
      • C350,
      • GLK350

    Vacuum Line

    $22.00
    Part Number: 204-430-57-29-64
    Mercedes-Benz Mercedes-Benz
    Replaces: 204-430-28-29, 204-430-57-29
    Description: Separation point to vacuum pump or tothe intake manifold.
    Fits:
    • Mercedes-Benz:
      • C250

    Brake Line

    $52.00
    Part Number: 205-420-06-00
    Mercedes-Benz Mercedes-Benz
    Positions: Rear
    Description: Rear master brake cylinder to hydraulic unit.
    Fits:
    • Mercedes-Benz:
      • C350e,
      • C400,
      • C43 AMG,
      • C450 AMG
    Backordered

    Expansion Reservoir

    $55.00
    Part Number: 205-430-00-02
    Mercedes-Benz Mercedes-Benz
    Description: Brake fluid.
    Fits:
    • Mercedes-Benz:
      • AMG GT 43,
      • AMG GT 53,
      • AMG GT 63,
      • AMG GT 63 S,
      • C350e,
      • C400,
      • C43 AMG,
      • C450 AMG,
      • C63 AMG,
      • C63 AMG S,
      • CLS450,
      • CLS53 AMG,
      • E300,
      • E350,
      • E400,
      • E43 AMG,
      • E450,
      • E53 AMG,
      • E63 AMG S,
      • GLC300,
      • GLC43 AMG,
      • GLC63 AMG,
      • GLC63 AMG S

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