Signal Acquisition Control Module 1649005401 SAM Module Control Unit Replacement for Benz GL320 GL350 GL450 GL550 ML320 1Applicable Model: The signal acquisition control module is replacement for Benz GL320 GL350 GL450 GL550 ML320 ML350 ML450 ML500 ML550 ML63 R320 R350 R500 R63. 2OE 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. 3Convenient 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. 4Enhanced 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. 5Durable 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.