for dealer prices these aren't really out of line. keep in mind that any part with the three pointed star on the box is going to be more than the same part in a box without. i just looked up the flat rate times for the above jobs; pretty much accurate.

some of the jobs are a bit high even for the dealer but overall, that's the price one pays for owning one of these. flat rate time for changing plugs, (there's 12 of them at $18 a piece,) is three hours. the shop where i work, (an indy) would charge 3 hours x $135.

if one cannot afford to pay someone to fix their car, one either has to learn how to fix things themselves, or buy a Lexus.

owning a mercedes is not cheap and price shopping for a mechanic is asking for trouble. a good indy shop is going to be pricey because they pay their techs well and employ good techs. you can go to econo-lube-n-tune and pay less but then you're just asking for trouble.

my 2 cents