why does my scenic shake when driving between 45 and 60mph ?

i had a similar problem with my fiat at 60mph. tried inflating tyres correctly but it still happened. the problem was solved for me when i renewed my tyres (just remoulds but good enough). When you say you had the tyres re balanced is that the same as re-alignment?
sorry i can't be more helpful - try a local firm which specialises in replacing tyres

Brenda
April 2009