Mercedes-Benz W170 Brake Master Cylinder - Used Original Parts

Diagnosis and Common Symptoms

As the primary hydraulic component in your braking system, the master cylinder's integrity is non-negotiable. On the W170 SLK platform, failure is typically due to internal seal degradation over time. This allows hydraulic pressure to bypass the piston seals, resulting in a loss of braking force.

A key diagnostic indicator is a "sinking" brake pedal. When you hold firm pressure on the pedal at a stop, it will slowly creep towards the floor. This is a classic sign of internal bypassing and is distinct from the spongy feel of air in the lines. Visually, inspect the area where the cylinder meets the brake booster on the firewall for any signs of brake fluid leakage. While this component itself does not generate electronic fault codes, its failure will often trigger the red ( ! ) BRAKE warning light or a low fluid level indicator on the instrument cluster.

Introduction

Restore the confident and precise braking feel your SLK was engineered for with our Genuine Mercedes-Benz used brake master cylinders. Each unit is carefully salvaged from a W170 chassis and undergoes rigorous bench testing to validate its hydraulic pressure-holding capability. This ensures you receive a fully functional, original part that offers a direct-fit solution without the expense of a new component.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: W170 (SLK-Class 1996-2004). Suitable for SLK200, SLK230 Kompressor, SLK320, and SLK32 AMG. (Part number verification is recommended).

• Part Name: Brake Master Cylinder

• Condition: Genuine Used (Tested Working)

• Notes: Unit has been pressure-tested to confirm internal seals are holding correctly. We strongly advise a complete brake system flush with a new, approved DOT 4+ fluid during installation.