ABC Accumulator

Shanghai Siken Industries Inc.

Web: www.siken-inc.com

The ABC accumulator (in the context of Mercedes-Benz vehicles) is a hydraulic pressure accumulator used in the Active Body Control (ABC) suspension system.

Function

It acts as a pressure damper/reservoir in the high-pressure hydraulic circuit that controls the ABC shock absorbers (struts).

• It smooths out pressure spikes and fluctuations caused by the ABC pump and the rapid adjustments of the active suspension.

• This helps maintain stable system pressure, reduces stress on components (pump, valves, lines), and contributes to the system’s ability to counteract body roll, pitch, and dive in real time.

Typical applications

Found on models such as:

• S-Class (W220)

• CL-Class (C215)

• SL-Class (R230)

Common OEM part number example: A2203270115 (and equivalents).