I have a few problems with the car, in that on changing gear I sometimes hear a squealing noise. Also when driving it judders, on acceleration.

On 2 occasions in the last month when turning on the ignition the car has shook violently, so I quickly turn off the engine.

Has anybody any ideas of what this could  be? It is due for its first service next month with less than 4000 miles on the clock!!!!!!!!