Well, when I replaced my battery on my 300E, my mechanic didn't charge me a cent for labor. It took him about 1.2 minutes to install. Not sure how different your car is in terms of onboard computers, but I think the dealer may have gouged you. I don't think the computer needs to be reset manually or anything. I would assume that when you hook up the new battery, the car computer will reboot itself automatically.
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired
"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon