Mercedes-Benz ML55 AMG Problem Report

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

(7 reports)

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.

AAM caused automatical central locking, remote locking, and front fog lights to stop working. Cost $700 to replace AAM and get new keys programmed. -
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. -
AAM controller failed and remote lock system stopped working. Repair shop quoted $650 to repair. -
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