What comes after d service for a 2004 e-320 Mercedes?

A D service on a 2004 is just pretty much either a A or B service. Mercedes decided to add all these extra services on the new 2003 e-class, all it really did was cause confunsion. There are differant services for just the a/c filter, and lubing the sunroof. So just stick to A and B services and everything will get performed normally.