Model Series 167: Software For AIRMATIC Control Unit (LI32.22-P-073368)

Publication date: 2022-01-13
Reference number: LI32.22-P-073368

MODEL SERIES 167: SOFTWARE FOR AIRMATIC CONTROL UNIT

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI32.22-P-073368 Version 2, Date of Issue: January 13, 2022

MERCEDES-BENZ:	Model series 167 with code 489 (AIRMATIC) without 490 (Electrohydraulic suspension)
FUNCTION GROUP:	32.22 Air suspension
REASON FOR CHANGE:	Update to the GI, since software update is available

AIRMATIC fault message in instrument cluster.

An internal control unit fault led to the specified fault codes.

Replacement of CAIRS unit 51/8 does not remedy the problem.

Perform AIRMATIC software update on R24.

Symptom

Chassis/suspension/Suspension/Dampening/Suspension System Function/Absorber hardness selector not effective

Chassis/suspension/Suspension/Dampening/Suspension System Function/Indicator lamp is on

Chassis/suspension/Suspension/Dampening/AIRMATIC/Display message/Display Defective - Service Required

Chassis/suspension/Suspension/Dampening/AIRMATIC/Display message/Air Suspension - Service Required

Chassis/suspension/Suspension/Dampening/AIRMATIC/Indicator lamp/lit

Control unit	Fault code	Fault code description
N51/8 - Full air suspension (ABC)	C220C06	There is an internal fault in control unit
(CAIRS167) (GLE (167)) N51/8 - Full air suspension (ABC) (CAIRS167) (GLE (167))	C220C04	"Suspension". There is an algorithm fault. There is an internal fault in control unit "Suspension". There is an internal fault.