Mercedes-Benz W170 Brake Booster - Used Original Parts

Diagnosis and Common Symptoms

From the M.S. Motor workshop, the primary failure of the W170 brake booster is an internal diaphragm rupture. This creates a significant vacuum leak, directly impacting both braking force and engine stability. The lack of vacuum assistance results in a dangerously hard brake pedal, requiring excessive physical effort to slow the vehicle.

Commonly, a distinct hissing sound will be audible from the driver's footwell, especially when the brake pedal is applied or released. This vacuum leak will often compromise the engine's air-fuel mixture, leading to a rough or surging idle, stalling, and may trigger the "Check Engine" light with lean mixture fault codes (e.g., P0171). On the instrument cluster, this fault can also illuminate the BAS/ESP warning lights, as the system detects a malfunction in the braking circuit.

Introduction

Restore the factory-spec braking power to your SLK-Class with a Genuine Mercedes-Benz component. This is not an aftermarket alternative; it is an original part salvaged and meticulously inspected. Each W170 brake booster undergoes a rigorous vacuum-hold test to confirm the integrity of its internal diaphragm, ensuring it performs precisely as the manufacturer intended.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: W170 SLK-Class (1996-2004) - Fits SLK200, SLK200 Kompressor, SLK230 Kompressor, SLK320.

• Part Name: Brake Booster / Brake Servo

• Condition: Genuine Used (Tested Working)

• Notes: We strongly advise inspecting the vacuum supply hose and the one-way check valve during installation. A cracked hose or faulty valve can present symptoms identical to a failed booster.