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The product is a genuine OEM Engine Control Module Unit (ECM) for a 07-12 Mercedes W221 S-Class, featuring a fast microprocessor for efficient operation. Made of aluminum, plastic, and steel, this ECM requires programming and comes with terminal pins for easy installation on the front of the vehicle. Manufactured in Germany by Mercedes-Benz, this ECM is a high-quality replacement part with the manufacturer part numbers A273 900 18 00 and A273 900 18 00.
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When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.