Notes on Active Body Control suspension - AH32.50-P-0001-01N

WARNING: This page does not describe the selected car, but rather 202 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz S65 AMG, and 2019 Mercedes-Benz SLC300. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 215, 216

MODEL 220 with CODE 487 (Active Body Control (ABC))

MODEL 221 with CODE 487 (Active Body Control (ABC))

MODEL 230 with CODE 487 (Active Body Control (ABC))

MODEL 231.### ## up to 021273 with CODE 487 (Active Body Control (ABC))

Fig 1: Identifying Active Body Control Suspension (Shown On Model 215)

Courtesy of MERCEDES-BENZ USA

Shown on model 215

Fig 2: Identifying Active Body Control Suspension Components (Shown On Model 230)

Courtesy of MERCEDES-BENZ USA

Shown on model 215 Shown on model 230

Always clean the area adjacent to the connections and hose fittings on any and all components being removed prior to starting repair work on ABC systems.
Use caution to ensure that residue and contaminants from repair operations, such as metal shavings, lint, etc., do not enter the ABC system through connections and hose fittings.
Use the bleed screw (56, 57) to drain the hydraulic fluid, then dispose of the fluid.

Carefully open bleed screws (56, 57) so that the hydraulic fluid can flow out slowly.

This helps to prevent the body from lowering too quickly.

Because even minute particles and traces of contaminants can lead to ABC failure, always pay scrupulous attention to cleanliness when adding hydraulic fluid!
When bleeding air from the ABC system, and whenever allowing the pump motor to run, always ensure that the fluid reservoir (2) contains an adequate supply of hydraulic fluid, and verify that the tandem pump/hydraulic pump (1) is not aspirating air.
Adding hydraulic fluid.

The funnel with filter must not be used with other service fluids. To help prevent damage due to dirt entering the ABC system, always store this filter-equipped funnel in a separate cabinet.

The ABC fluid-return circuit contains a distribution valve with a booster valve and a temperature sensor.
Before leaving the vehicle parked for extended periods, always bring the front road wheels to their straight-ahead position. Should the ABC system subsequently suffer an internal pressure loss, this precaution will protect vehicle bodywork against contact and possible damage stemming from contact with front wheels that are turned to an angle.