MERCEDES S-class W140 / C140. ECU ENGINE CONTROL MODULE. Fits V8 or V12 cylinder engines only. 4.2, 5.0 V8. 7.1 , 7.3 M297 AMG V12. PLEASE NOTE : be sure that the part number is the same as the number you need. If it is different please see other items in our store. We have all types of this item. If you are unable to check and read your part number, contact your Main Dealer. They will help you and check the Part Number for you using the VIN. Engine ECU modules need to be adapted/programmed using diagnostic computer. All our items are in full working order; however all of them are used and may have storage marks. We have tried to show this in the pictures above. It is no problem to take and send extra pics if required.