Is dealer service trying a ripoff?

[atikovi]

I'm selling my 70,000 mile 2004 E500 and a buyer had me take the car to a dealer for a check out. Nothing major found but they wrote that it needs an oil change, coolant change, transmission fluid change and brake fluid change. First off, how do they know the oil is dirty when there isn't even a dipstick on this model? The FFS indicator shows the next service isn't due for almost 10,000 miles. Second, the owners manual says the car requires coolant changes only every 150,000 miles or 15 years. Third, doesn't the transmission in this car have lifetime fluid, or at least maybe to 100,000 but cetainly not at 70K. And lastly, I just changed the brake fluid two months ago. It looks like they couldn't find any REAL problems so they had to make up some service to get money.