> Also does it have a volume? Things as loud as buggery.
Yes, but buried inside.
You need to remove the four screws from the corners of the plastic case, then remove the lid and extract the circuit board from the box.
At the heatsink end of the PCB, you should see two small black square parts with what looks like a white arrow in the centre. One is marked VolEng, I couldn't read what the other said.
These are rotary resistors and control the volume of the engine sounds (VolEng) and other sounds. With a small flat bladed screwdriver, you should be able to rotate the central white hub to adjust the volume of the sounds. The central section will only rotate for a certain arc - about 8 o'clock to 4 o'clock - not all the way round.
careful not to let any part of the PCB contact anything or it'll go really quiet really quick