For Mercedes Benz A2189009203 ECU LED Headlight Control Module Ballast Items Description: Placement: Left side or Right side Compatible Part numbers: A2189009203 - A 218 900 92 03 - 2189009203 A1668203689 - A 166 820 36 89 - 1668203689 A2189009700 - A 218 900 97 00 - 2189009700 Mercedes Benz GL-Class X166 2012-2015 Mercedes Benz ML-Class W166 2011-2015 Mercedes Benz SL-Class R231 2013-2016 Mercedes Benz CLS-Class C218, X218 2011-2015 Package: 1 x Ballast Shipping Policy: Item will be shipped within 1-5 working days after full payment is received Economy Shipping: 15-50 business days Standard Shipping: 10-35 business days Expedited Shipping: 3-7 business days Note: Average delivery time for reference only, actual time varies for different countries and related to uncontrollable factors such as weather weather / custom and holidays. Terms of Sale: - 30 Days Free Return and Money Back - If you are not satisfied with your purchase, you can return the item with original packaging back to us for full refund, not any re-stock fee, the return cost should be paid by buyer. - If you receive any wrong items, or damage during the transportation or defect items, we will accept the return and pay the return freight, Please noted that the return cost should be prepaid by buyer, we will issue the refund of return cost to buyer after inspecting the faulty item. - Please kindly contact us before return, our representatives will send you the detailed return instruction. - The guarantee will be only for the cost of the item, we will not responsible for installation or other fees like labor expenses, towing expenses, additional repair expenses or other related expenses. Customer Service: Contact us if you have a complaint, or plan to leave us a negative or neutral feedback, please contact us and we will be glad to help solve the problem. We reply your message within 24 hours, thank you!