hi every one got a faulty ecu on my r129 3.2 -2001,got another ecu withsame part number but some of other numbers are different such as soft ware code .the chap doing it cant transfer all data off original to 2nd ecu,firstly do all numbers have to be the same,and does anyone know of a ecu for sale off a 2001 merc R129,theres plenty out there but all with slighly diff numbers thanks/