2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI32-22_P-47927-2 Date: 090917

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI32-22_P-47927-2 Date: 090917

Suspension - 'AIRMATIC' Service Required Displayed/DTC's

"AIRMATIC - SERVICE REQUIRED" IN DISPLAY

Topic Number LI32.22-P-047927

Version 2

Design Group 32.22 Air Suspension

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 144

Date 09-17-2009

Validity Model series 211 with SA code 489 (Air suspension)

Model series 211 wagon with steel suspension

Model series 164 with SA code 489 (Air suspension)

Model series 251 with SA code 489 (Air suspension)

Model series 251 with electronic rear axle level control

Model series 221 with SA code 489 (Air suspension)

Reason for change Note within remedy section removed

Reason for block

Complaint:

Display message: "AIRMATIC - Service Required".

The following fault codes are entered in the control unit and displayed in the quick test:

FC 5320 Drain valve: Open circuit or insufficient valve current in model series 211, 219.

FC 5260 Drain valve: Open circuit or insufficient valve current in model series 211.

FC 5250 Drain valve: Open circuit or insufficient valve current in model series 251, 164.

Cause:

Possible cause:

Defective connecting cables to drain valve at AIRMATIC compressor. This results in setting of the above fault codes.

Remedy:

Throughly examine electrical connecting cable of drain valve in area of compressor for chafe marks and discontinuities.

Especially check the cable in the connector by pulling it gently and carefully examine the cables under the black insulation tape for discontinuity by

pulling and flexing them. Repair defective cables if necessary

Symptoms

Control unit/Fault code

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 145

Parts

Work units

Validity

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 146