If you ordered the old part number you may get an old part, sometimes you are told the new relevant number. I am sure that the later cars were fitted with a part with different number. A very similar number but a different one. Mercedes altered the part number according to its revisions., I believe the numbers changed would be the 4th and 3rd from the end. I’ll check the part numbers for the 2004 and 2007 years and compare.