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

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.

RepairPal Verified
Average mileage: 124,333 (120,000–128,000)
4 model years affected: 2000, 2001, 2002, 2003
7 people reported this problem
The nation’s largest network of independent repair shops certified for expert training, quality work and fair pricing
problem details
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.
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.
2001 Mercedes-Benz ML55 AMG 125,000 mi,
AAM controller failed and remote lock system stopped working. Repair shop quoted $650 to repair.