Feature: 1. Applicable Model: The signal acquisition control module is replacement for Benz GL320 GL350 GL450 GL550 ML320 ML350 ML450 ML500 ML550 ML63 R320 R350 R500 R63. 2. OE Number: The part numbers for reference are 1644404701, 1649005401, 1645457616, 1649025700, 1649007200, 1644404601, 1644424000, 1645456116, 1649022500, 1649005101, 164 900 54 01, 1649005401, A 164 900 54 01, A1649005401, 1649004500 1649004801, 1649006900, 1644401501, 1644402301, 1644403201, 1644404301, etc. 3. Convenient and Practical: The signal acquisition module control unit captures input signals from various switches, monitoring devices, alarm systems, and controls in the vehicle so that the vehicle receives the correct signals and operates as instructed. 4. Enhanced Performance: The signal acquisition SAM module sends signals to the vehicle's buttons when they are activated. When there is a problem with a device, it sends a warning message to the controller area network bus, ensuring accurate data acquisition, enabling smooth communication between various vehicle systems. 5. Durable Material: The signal acquisition SAM control module is made of durable and reliable material, high strength and wear resistant, ensuring long lasting use, also having simple installation. Specification: Item Type: Signal Acquisition Control ModuleOE Number: 1644404701, 1649005401, 1645457616, 1649025700, 1649007200, 1644404601, 1644424000, 1645456116, 1649022500, 1649005101, 164 900 54 01, 1649005401, A 164 900 54 01, A1649005401, 1649004500 1649004801, 1649006900, 1644401501, 1644402301, 1644403201, 1644404301, 1645401801, 1645401901, 1645409562, 1645409762, 1645409862, 164900480164, 164900510164, 164900480187, 164900510187, 164900480180, 164900510180, A1645408062, A1645407845, A1645402101, 1644403501, 591-53350, 1645400601, 1645457032, 1644422800 Fitment: Replacement for Benz GL320 2007-2009 Replacement for Benz GL350 2010-2012 Replacement for Benz GL450 2007-2012 Replacement for Benz GL550 2008-2012 Replacement for Benz ML320 2007-2009 Replacement for Benz ML350 2006-2011 Replacement for Benz ML450 2010-2011 Replacement for Benz ML500 2006-2007 Replacement for Benz ML550 2008-2011 Replacement for Benz ML63 AMG 2007-2011 Replacement for Benz R320 2007-2009 Replacement for Benz R350 2006-2013 Replacement for Benz R500 2006-2007 Replacement for Benz R63 AMG 2007. Package List: 1 x Signal Acquisition Control Module1 x User Manual Note: 1. Please double check the part number of your item, matching information is for reference only.2. The product needs to be coded using the installed diagnostic tool according to the prompted steps on the diagnostic instrument. If the original car has an error code, use the diagnostic tool to remove it when installing the product. If the fault code is cleared, it can be used normally. If the error code cannot be cleared, consult the manufacturer first.