I have 2 problems that have appeared in the last couple of weeks on my 17' plate E220d. the first is a squealing noise when coasting or accelerating which stops as soon as I touch the brakes. It seems to be more left hand side and is very intermittent. It tends to start happening when the car has warmed up but can come and go as it pleases. The second is a judder under braking. It is not really noticeable under light braking but if I have to apply a bit more then it is very obvious. Any ideas and also if these would be warranty issues? I have had the car since May from a main dealer. The worry I have with warranty issues is this thing about if it's a new fault that's developed or something that was there when sold. I wouldn't care if the selling dealer was not a 2 + hour drive away.