Hi, I've got a mercedes c200 2.0 auto on a [m] plate and have a couple of issues, it splutters when pulling away and is quite sluggish, it seems to be smoother from about 50mph, I was thinking fuel filter or plugs but I don't know where the fuel filter is?? and the kickdown doesn't work either and it seems to be quite lazy when it has to gear down, is there a trans fluid dipstick on these?? sorry if I sound a bit stupid but this is the first merc I've ever owned, thanks.