Mercedes-Benz W205 Airmatic Compressor Pump - Used Original Parts

Diagnosis and Common Symptoms

From the workshop floor, a failing Airmatic compressor on the W205 chassis presents a clear set of diagnostic flags. The primary complaint is a vehicle that fails to raise, often accompanied by the "Vehicle Rising" message displayed indefinitely on the instrument cluster. You may also observe the vehicle sagging at one or all corners, particularly after being parked overnight.

On the diagnostic side, connecting a capable scan tool like XENTRY will typically reveal fault codes stored in the Airmatic control unit (N51). Common codes include:

• 5508 / C155E00: The recovery time during filling of the central reservoir is too long. This points directly to a weak or inefficient compressor failing to build pressure within the specified timeframe.
• 5503 / C155664: The component A9/1 (AIRMATIC compressor) has a malfunction. The signal is not plausible.
• C15671C: Air Suspension Compressor Relay - Voltage out of range.

A physical inspection may reveal the compressor running continuously or making an excessive humming noise as it struggles to meet its pressure targets. This prolonged duty cycle leads to overheating and eventual catastrophic failure.

Introduction

This is a Genuine Mercedes-Benz Airmatic compressor, carefully extracted from a donor W205 vehicle. Before being approved for sale, each unit undergoes a comprehensive bench test to verify its pneumatic integrity, pressure output, and electrical function. We ensure you receive a component that has been proven to perform to factory specifications, eliminating the uncertainty of installing an untested part.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: W205 C-Class (2015-2021) - C180, C200, C250, C300, C400, C43 AMG equipped with Airmatic suspension (Option Code 483).

• Part Name: Airmatic Suspension Compressor Pump

• Condition: Genuine Used (Tested Working)

• Notes: It is critical to replace the Airmatic compressor relay and inspect the entire system for air leaks prior to installing this unit. Failure to address underlying system leaks is the primary cause of premature compressor failure.