I recently had my 2004 TDI Quattro at the body shop for some paint work.
I am sure that since I picked it up I can hear the waste gate much louder, it's almost like a petrol turbo with a dump valve!
Both wings and the front bumper were removed
Any ideas what might of happened a small pipe off maybe?
The only thing the painter remembers disturbing is a black box under the passengers wing with 2 pipes going to it.
The car is completely standard with 60k on the clock, and doesn't seem down on power.
Any ideas were to start looking?