I had a free trial map put on my car yesterday so was giving it quite a bit of grief last night, today i noticed a knocking noise from under the car in the middle towards the front (which i could slightly feel from under the pedals), it's when i go over larger bumps and speed bumps at 15 - 20mph + . At first i thought it was bushes at the front but driving up and down my drive i have noticed it knocks on what ever side i go over the bumps on.. then i thought it could be the exhaust so got under the car and gave it a good shake, but still nothing. Has anyone got any ideas of where i should look next ? Also, nearly forgot to add, my clutch slipped slightly this morning. Took it to a friends garage and he told me to put it in third with the handbrake on and see if i could pull off, which i could (with a lot of smoke). i dont know if thats the right thing to do but, now my clutch pedal has got alot lighter, still seems to work ok though. What could this be? Thanks, Lee. Its a amk s3 by the way.