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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 124,333 (120,000–128,000)
4 model years affected: 2000, 2001, 2002, 2003
7 people reported this problem
Viewing 1 - 3 of 3 comments
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.