Air Suspension Control Unit, Basic Function - GF32.22-P-9890A

Model All (CAR) 

With Code 489 (AIRMATIC Dual Control/semi-active air suspension) 

Model All (CAR) 

With Code 490 (Electrohydraulic suspension) 

Overview 

This document contains information on:

• General 
• Function 

General 

The air suspension control unit is the central control unit for the functions of the suspension.

Function 

The air suspension control unit primarily intervenes in the following functions:

• Level control
• Wake-up mode
• Air suspension
• Electrohydraulic suspension
• Raise/lower rear end
• Active lean-over in bends
• Recovery mode
• Individual wheel control

To execute these functions, the air suspension control unit primarily processes the following input factors:

• Vehicle level
• Body acceleration
• Lateral acceleration
• Vehicle speed
• Ambient air temperature

The air suspension control unit processes these input factors and primarily transmits the following actuations:

• Air suspensions
• Damping valve unit
• Electrohydraulic controller unit

	Component descriptions
	Component description for adaptive damping system control unit	Model 223 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	GF32.32-P-1010A
		Model 297 with code 489 (AIRMATIC Dual Control/semi-active air suspension)	GF32.32-P-1010D
		Model 295 with code 489 (AIRMATIC Dual Control/semi-active air suspension)	GF32.32-P-1010E
		Model 296 with code 489 (AIRMATIC Dual Control/semi-active air suspension)	GF32.32-P-1010G