OE SAM Signal Acquisition Control Module For Mercedes W164 W251 ML350 06-12 NEW. This unit will need to be coded with the installed diagnostic tool according to the. The prompt steps on the diagnostic instrument. If the original car has an error code, please use the diagnostic tool to. Eliminate it when installing the product. If the error code is cleared. After the elimination, it can be used normally. If the errcor code. The error code occurs because the switch of the trailer module is turned on. Please turn off the settings of the trailer module and it can be used. This product has a control module for trailers and tractors. Therefore, this product can be used for trailers and tractors. This unit must be programmed after installation. Please do not open the product without permission to avoid damaging the label. For MERCEDES 164 900 54 01, A 164 900 54 01,1649005401, A1649005401. For MERCEDES 164 900 51 01, A 164 900 51 01,1649005101, A1649005101. Will fit Following Models. Code 848: Electric windows. Your satisfaction is our top priority. We have always been committed to providing the best service and reliable products to every customer. However, accidents may occur at times, and we understand your concerns and setbacks. We will reply to you as soon as possible. Our goal is to provide first-class customer service, so we usually do our best to solve any problems! Please Note That This Service Is Not Trackable. Please Add Another 5-10 Days As a Delay. Please Note That Size and Color Representation Are Subject to Manufacturing Variance and May Not Be Exact. Also Note That Monitor Settings May Vary from Computer to Computer and May Distort Actual Colors. Your Satisfaction Is Important to Us and We Value Your Business. We Are in Shenzhen of Pearl River Delta Which Is Developed Place with Economy and Trade We Are a Profession Trade Company. Wholesale Price Could Be Offered If Large Quantity Needed. We Are off Work on Weekends or Public Holidays, Any Messages Received During This Period Will Be Replied on Next Monday Morning. If You Have Any Problems, We Are Very Glad to Help You. (Not Include Public Holiday).