Replacement for part numbers：
for  1649004101 164-540-44-01 164-440-38-01 164-540-14-01 164-540-25-01 A1645407662A1645456716 A1649025300 A1649003501

Fits for :
Fits for X164 2007-2012; GL320 GL350 GL420 GL450 GL500
Fits for W164 2005-2011; ML280 ML300 ML320 ML350 ML420 ML500 ML63AMG
Fits for W251 2006-2012; R280 R320 R350 R500 R63AMG


Note:
This 1649004101 Front Signal Acquisition Module is not original parts, the mention of brand names and any related model designation above is only for purposes of demonstrating compatibility.
NO installation instruction and recommend professional installation.