For what ever reason Mercedes does not use the 5 year antifreeze. I don't know about the type of brake fluid that Acrua uses, but I have never heard of 5 year brake fluid. I just got into the habit of 3 year coolent changes and 2 year brake fluid changes. The coolent and brake fluid changes are similar to other makes of cars. I pull the drain plug on the engine to drain the coolent from the engine block.
Based on the recent maintenance you did, I recommend that the pollen filters (located behind the glove box) be replaced every 15K miles. I recently replace my pollen filters and at 15K miles they were dirty but not filthy dirty.
You can save more $ by ordering your parts through FastLane instead of the dealer.
Also Mercedes recommends replacing the fuel filter every 60K miles.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles