Car Problem Reports

Mercedes-Benz ML55 AMG "All Activity Module" May Cause Multiple Electrical Malfunctions

Mercedes-Benz ML55 AMG Problem
7 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003

Average Mileage: 124,333 mi (120,000 mi - 128,000 mi)


Various electrical problem may develop due to a failed "all activity module". Our technicians tell us that proper diagnoses is required to be sure any electrical faults are being caused by the failed module.

  • Visitor, , 120,000 mi

    AAM caused automatical central locking, remote locking, and front fog lights to stop working. Cost $700 to replace AAM and get new keys programmed.

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  • Visitor, , 128,000 mi

    AAM has stopped allowing the key FOB to lock/unlock the doors, or set the alarm for the vehicle. This appears to be a COMMON issue with Mercedes Benz W-163 SUV vehicles.

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  • Visitor, , 125,000 mi

    AAM controller failed and remote lock system stopped working. Repair shop quoted $650 to repair.

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