Good evening! And welcome to Mercedes Forum
I my self am new to the forum and so far looks great! I can send you a Service Matrix I developed just for the Flex-plus service system you are referring to. This system was developed by MB on the introduction of the w211 body or better known as an E-320.
In 2003 and 2004 the E-320 was under factory paid maint program until 4 years or 50000 miles as of 05 MB dropped the plan and went to a fixed service plan. Your car actually can calculate a service schedule with a minimum of 10000 oil change, as of 2005 is fixed every 13000 no mater what. and just learned a few days ago 2009 will go to a fixed 10000. YES I Know! The flex and flex-plus service system has caused a lot of confusion with our customers.
I will send you the matrix in PDF and an explanation how to read it you will find it very simple upon its detail. I designed it for my Technicians and Support Staff. Forward your e-mail to
mbteck1@aol.com and I will send it to you.... and once again wlcome to Mercedes Forum!!
Best Regards
Perry