so what kinda fluid did you wind up using? is that place a dealer? so did you wind up using MB Dexron III? like you said it's cheap insurance. i'm planning on switching everything, tranny and diff, to Swepco on my 300e-2.8. i hear a bit of a whine - not much but the fact that i hear something is unacceptable to me at this point with only 52k...