An old friend of mine who used to get 250K+ miles out of every car he owned once told me "easy on the pedals" is the key to getting a long life out of a vehicle. Drive the way way you want, but you will wear out many other components besides your engine and transmission driving it hard no matter how often you change fluids. I floor my 300TD once every now and then cause im told it gets the carbon out of the turbocharger, but besides that i baby all my cars. My 300D was owned by a 81 yr old man before me who drove it lightly. If you were in the market for another used benz in a couple of years, would you want to buy it from someone who drove it lightly or someone who thrashed it all the time?