Feature: 1. Fitment: Rear signal acquisition module is professionally manufactured, replacement for Benz GL ML R Class ML350 GL450 ML63 AMG. 2. OE Number: 1649005401, A1649005401 are the reference part numbers. Please double check the part number of your item to ensure perfect fit. 3. Function: SAM control module is used to collect most of the signals on the vehicle and help to maintain the normal operation of the car. 4. Sturdy Material: Signal acquisition module is made of ABS housing and aluminum contacts for long durability and good signal transmission. 5. Ideal Replacement: Rear SAM is designed to replace the damaged rear SAM control module of the original car without modification. Specification: Item Type: Rear SAM Signal Acquisition Module Material: ABS+aluminum OE: 1649005401, A1649005401 Fitment: Replacement for Benz GL320 164825 164822 Not for vehicles with (Code 848) 2007-2009 Replacement for Benz GL350 164.825 Not for vehicles with (Code 848) 2010-2012 Replacement for Benz GL450 164.871 Not for vehicles with (code 848) 2007-2012 Replacement for Benz GL550 164886 Not for vehicles with (Code 848) 2008-2012 Replacement for Benz ML320 164.125 164.122 Not for vehicles with (code 848) 2007-2009 Replacement for Benz ML350 164.186 from VIN A053008 from 05.10.2005; not for vehicles with (code 848) 2006-2006 Replacement for Benz ML350 164186 164125 Not for vehicles with (Code 848) 2007-2010 Replacement for Benz ML450 164.195 Not for vehicles with (code 848) 2010-2011 Replacement for Benz ML550 164.172 Not for vehicles with (Code 848) 2008-2011 Replacement for Benz ML63 AMG 164.177 from VIN A694290 from 01/11/2011 2010-2011 Replacement for Benz R350 251.157 251.125 251.165 251.124 251.156 From chassis number A125365 From 11 January 2011 2010-2012 . Package List: 1 x Rear SAM Signal Acquisition Module Note: 1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks