Experiencing problems with your 2001 Mercedes Ml320 key fob can be frustrating, especially when multiple keys fail to function correctly. One owner of a 2001 ML320 encountered this exact issue and sought solutions after their keys began to behave erratically.
Initially, the owner had three keys for their 2001 Mercedes ML320, but only one operated with full functionality. Over time, the other keys became unreliable. Following the owner’s manual, they attempted to re-sync the keys by turning the ignition to position 2, removing the key, and pressing the unlock button five times while holding the lock button. While this process seemed to establish a temporary connection—the car would lock or unlock once—the key would then cease to function again. This issue persisted across all three keys for their 2001 Mercedes ML320.
Seeking professional help, the owner visited a dealership, hoping for a more permanent fix. However, the service manager suggested a costly solution: replacing the key for $375. This recommendation was particularly upsetting as the owner had already purchased a new key three years prior, highlighting concerns about the longevity and reliability of these Mercedes keys.
Driven to find a more cost-effective solution, the owner researched online and discovered that an AAM (All Activity Module) problem could be the underlying cause. Replacing the AAM, however, is also an expensive repair, estimated to be around $600. The question then arises: would replacing the AAM resolve the key issues and restore functionality to all three keys for the 2001 Mercedes ML320?
Before proceeding with such a significant expense, the owner understandably sought advice and confirmation. They inquired if anyone else had experienced similar key issues with their 2001 Mercedes ML320 and whether replacing the AAM was indeed a firm solution or if alternative, more affordable fixes existed. This situation highlights a common concern for 2001 Mercedes ML320 owners facing key malfunction and the desire for reliable and cost-effective repair options.
