Don't pay attention to the maintenace guide and use the 5 year AF that is orange. I've used it with good results for many more than 5 years. If you buy MB AF you will get "hosed" via price as thay simply buy it from one of the many AF [Dupont etc .] companies and double the price. MB's are regular cars that used to have a reputation as "high" quality cars. They bought Chysler and are now working to design a lower quality car as their stock price reflects to down grading of the marquie.