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.Google+
Car Problem Reports
Mercedes-Benz ML55 AMG "All Activity Module" May Cause Multiple Electrical Malfunctions
Mercedes-Benz ML55 AMG Problem
Average Mileage: 124,333 mi (120,000 mi - 128,000 mi)
Visitor, 2001 Mercedes-Benz ML55 AMG, 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.
Visitor, 2000 Mercedes-Benz ML55 AMG, 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.
Visitor, 2001 Mercedes-Benz ML55 AMG, 125,000 mi
AAM controller failed and remote lock system stopped working. Repair shop quoted $650 to repair.