I have had this kinda knockingy clangy noise from under the car when going over small bumps in the road. I had it on the ramp at quick fit and they showed me what it was as apparantly its a common fault with A3s.
Theres like a bracket in the middle that holds the middle section up against the car and it has come away from the body so when it moves it hits the bracket and makes a noise.
I asked if anything can be done about this and they said nothing unless u want to change the whole middle section, even tho theres nothing wrong with ur pipes.
Is there really nothing i can do to resolve this as its annoying.
Advice would be much appreciated.